CN109879352A - A method of utilizing chicken manure charcoal Adsorption removal of Cadmium from wastewater - Google Patents
A method of utilizing chicken manure charcoal Adsorption removal of Cadmium from wastewater Download PDFInfo
- Publication number
- CN109879352A CN109879352A CN201910198669.9A CN201910198669A CN109879352A CN 109879352 A CN109879352 A CN 109879352A CN 201910198669 A CN201910198669 A CN 201910198669A CN 109879352 A CN109879352 A CN 109879352A
- Authority
- CN
- China
- Prior art keywords
- chicken manure
- cadmium
- wastewater
- manure charcoal
- charcoal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of methods using chicken manure charcoal Adsorption removal of Cadmium from wastewater, comprising: after chicken manure charcoal is ground and is sieved, mixes with the waste water containing cadmium ion, adjusts pH value, adsorbed；Wherein, the chicken manure charcoal is that chicken manure is obtained through high temperature pyrolysis under anaerobic.The present invention first simply pre-processes chicken manure, and then chicken manure charcoal can be obtained in pyrolysis under anaerobic.Method of the invention has simple process, the advantages such as raw material sources are extensive, low in cost, highly-safe, sharp useless environmental protection.For chicken manure charcoal produced by the present invention for removing removal of Cadmium from wastewater, compared with other adsorbent materials, chicken manure charcoal is good to the adsorption effect of removal of Cadmium from wastewater, within the room temperature short time, that is, can reach adsorption equilibrium.
Description
Technical field
The invention belongs to technical field of waste water processing, and in particular to a kind of to utilize cadmium in chicken manure charcoal Adsorption waste water
The method of ion.
Background technique
Cadmium (Cd) is a kind of heavy metal with high biological toxicity, is the major pollutants in environment, it can eat
It is accumulated in object chain, human health is damaged, such as exposure will lead to hypertension, anaemia, sclerotin and kidney injury for a long time.It grinds
Study carefully and show that cadmium has the characteristics that difficult to degrade, toxicity is big, easily accumulation, ecological environment and organism can be caused to seriously endanger.Cause
This, it is vital that heavy metal cadmium ion Cd (II) is removed from waste water.In recent years, the removal of cadmium is by more and more
Concern.
Treatment for cow manure is always one of the technical problem that modern poultry not can effectively solve, becomes puzzlement cultivation for a long time
A big thorny problem.For the feed of chicken intake there is no digesting and assimilating completely, there are about the nutrients of 40%-70% to be discharged body
Outside.Although chicken manure nutrient in all fowl and animal excrements be it is highest, chicken manure is not processed or decomposed and is applied directly to
On crop, then there is very big harm and hidden danger: directly applying in the soil, ferment under suitable conditions and generate a large amount of heat
Amount, burns crop root.Chicken manure brings disease hidden danger to crop per se with a large amount of germs simultaneously.Chicken manure is serious pollution
Source becomes burden and negative value in some farms, but by the processing reasonable utilization of science, and can turn waste into wealth, and generation can
The economic benefit of sight can be improved the ability of farm's struggle for existence and sustainable development in culture efficiency increasingly low today.
Therefore, how chicken manure progress harmless treatment to be particularly important.
Currently, the working process mode of chicken manure is multifarious, varied, respectively there is superiority and inferiority, but processing technique is not also so far
Perfection to the greatest extent.
Summary of the invention
It is a primary object of the present invention to provide a kind of side using chicken manure charcoal Adsorption removal of Cadmium from wastewater
Method, the technical problem to be solved is that can prevent and eliminate fecal pollution and go by carrying out recycling treatment to chicken manure
Except removal of Cadmium from wastewater, achieve the purpose that " circular economy, turns waste into wealth at the energy saving, treatment of wastes with processes of wastes against one another ".
The object of the invention to solve the technical problems adopts the following technical solutions to realize.It proposes according to the present invention
A kind of method using chicken manure charcoal Adsorption removal of Cadmium from wastewater, comprising: after chicken manure charcoal is ground and is sieved,
It is mixed with the waste water containing cadmium ion, adjusts pH value, adsorbed；Wherein, the chicken manure charcoal be chicken manure under anaerobic
It is obtained through high temperature pyrolysis.
The object of the invention to solve the technical problems also can be used following technical measures and further realize.
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein containing cadmium described
In the waste water of ion, the mass concentration of cadmium ion is 5-200mg/L, back-ground electolyte NaNO3。
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein the chicken manure is raw
The preparation method of object charcoal includes:
Chicken manure is pre-processed, the pretreatment includes removal of impurities, natural air drying, crushing, sieving and drying；
In N2Under protection, the pretreated chicken manure is pyrolyzed, chicken manure charcoal is obtained.
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein the drying
Temperature is 100-150 DEG C.
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein the pyrolysis
Initial temperature is 60 DEG C, heating-up time 1h.
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein the pyrolysis
Temperature is 200-800 DEG C, and the time of the pyrolysis is 1-3h.
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein the absorption
Temperature is 15-35 DEG C, and the time of the absorption is 0-24h.
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein the pH value is
4.5-6.5。
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein the pH value is used
0.1mol/L HNO3Or 0.1mol/L NaOH is adjusted.
Preferably, the method above-mentioned using chicken manure charcoal Adsorption removal of Cadmium from wastewater, wherein according to formula (1) into
Row calculates, and obtains the adsorption capacity of cadmium ion,
In formula (1), QeIt (mg/g) is the adsorption capacity of cadmium ion, CoIt (mg/L) is the initial concentration of removal of Cadmium from wastewater, Ce
It (mg/L) is the equilibrium concentration of removal of Cadmium from wastewater, V (L) is the volume of the waste water containing cadmium ion；M (g) is chicken manure charcoal
Quality.
By above-mentioned technical proposal, the invention proposes a kind of using chicken manure charcoal Adsorption removal of Cadmium from wastewater
Method at least has the advantage that
1, the present invention utilizes chicken manure charcoal Adsorption removal of Cadmium from wastewater, at 200 DEG C, 400 DEG C, 600 DEG C and 800 DEG C
It is lower be pyrolyzed obtained chicken manure charcoal to the maximum adsorption capacity of Cd (II) be respectively 45.500mg/g, 49.1667mg/g,
52.015mg/g and 49.335mg/g, it is seen then that the chicken manure charcoal being pyrolyzed at 600 DEG C to the adsorption capacity of Cd (II) most
By force.Compared with other adsorbent materials, chicken manure charcoal is good to the adsorption effect of removal of Cadmium from wastewater, within the room temperature short time, i.e.,
It can reach adsorption equilibrium.While efficiently using chicken manure waste, processing heavy metal in waste water Cd (II) pollution is proposed
The pollution administration new approaches of " treatment of wastes with processes of wastes against one another " have the function that the useless environmental protection of benefit well.
2, the present invention pre-processes chicken manure, and the pretreatment includes removal of impurities, natural air drying, crushing, sieving and drying；
In N2Under protection, pretreated chicken manure is pyrolyzed, obtains chicken manure charcoal.The present invention first carries out chicken manure simple pre-
Processing, then chicken manure charcoal can be obtained in pyrolysis under anaerobic.With the raising of pyrolysis temperature, the pH of chicken manure charcoal
Value gradually increases, and yield gradually decreases, and ash content gradually increases, and when pyrolysis temperature is 800 DEG C, yield is minimum, compared with 200 DEG C of phases
Than, yield reduces 49.13%, and at a temperature of this, ash content highest is 64.63%.The preparation method has simple process, former
Expect the advantages such as from a wealth of sources, low in cost, highly-safe, sharp useless environmental protection.
3, the present invention can prevent and eliminate fecal pollution by carrying out recycling treatment to chicken manure and remove waste water
Middle cadmium ion, compared with other adsorbent materials, chicken manure charcoal is good to the adsorption effect of removal of Cadmium from wastewater, in the room temperature short time
It is interior, that is, it can reach adsorption equilibrium, while also achieving the purpose that " circular economy, turns waste into wealth at the energy saving, treatment of wastes with processes of wastes against one another ".
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the yield figure of chicken manure charcoal of the present invention；
Fig. 2 is the bio-available Zn concentration figure of chicken manure charcoal of the present invention；
Fig. 3 is hot weight-differential heat simultaneous thermal analysis (TG-DTA) figure of chicken manure charcoal of the present invention；
Fig. 4 is the XRD analysis figure of chicken manure charcoal of the present invention；
Fig. 5 is the FTIR spectrogram of chicken manure charcoal of the present invention；
Fig. 6 is the dynamics simulation curve graph of chicken manure charcoal Cd (II) of the present invention；
Fig. 7 is chicken manure charcoal of the present invention in 15 DEG C of isothermal simulation drawings to Cd (II) absorption；
Fig. 8 is chicken manure charcoal of the present invention in 25 DEG C of isothermal simulation drawings to Cd (II) absorption；
Fig. 9 is chicken manure charcoal of the present invention in 35 DEG C of isothermal simulation drawings to Cd (II) absorption；
Figure 10 is chicken manure charcoal of the present invention to the FTIR spectrogram after Cd (II) absorption；
Figure 11 is chicken manure charcoal of the present invention to the Raman spectrogram before the absorption of Cd (II)；
Figure 12 is chicken manure charcoal of the present invention to the Raman spectrogram after the absorption of Cd (II)；
Figure 13 is chicken manure charcoal of the present invention to the solid-state nuclear magnetic resonance figure before the absorption of Cd (II)；
Figure 14 is chicken manure charcoal of the present invention to the solid-state nuclear magnetic resonance figure after the absorption of Cd (II).
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, to a kind of side using chicken manure charcoal Adsorption removal of Cadmium from wastewater proposed according to the present invention
Method, specific embodiment, structure, feature and its effect, detailed description is as follows.In the following description, a different " implementation
What example " or " embodiment " referred to is not necessarily the same embodiment.In addition, special characteristic, structure or spy in one or more embodiments
Point can be combined by any suitable form.
One embodiment of the present of invention proposes a kind of method using chicken manure charcoal Adsorption removal of Cadmium from wastewater,
Include: after chicken manure charcoal is ground and is sieved, to be mixed with the waste water containing cadmium ion, adjusts pH value, adsorbed；Wherein, institute
Stating chicken manure charcoal is that chicken manure is obtained through high temperature pyrolysis under anaerobic.
The present invention utilizes chicken manure charcoal Adsorption removal of Cadmium from wastewater, compared with other adsorbent materials, chicken manure biology
Charcoal is good to the adsorption effect of removal of Cadmium from wastewater, within the room temperature short time, that is, can reach adsorption equilibrium.It is useless in effective use chicken manure
While gurry, processing heavy metal in waste water Cd (II) pollution proposes the pollution administration new approaches of " treatment of wastes with processes of wastes against one another ", well
Have the function that the useless environmental protection of benefit.
Further, the grinding, which refers to, is crushed chicken manure charcoal and is sieved with 100 mesh sieve using high speed Universal pulverizer.
Further, suction of the chicken manure charcoal of different pyrolysis temperatures to heavy metal Cd (II) is measured using batch experiment method
Attached effect.
Further, front and back is mixed with chicken manure charcoal, the temperature of the waste water containing cadmium ion is maintained at 25 DEG C or so.
Preferably, the mass concentration of cadmium ion is 5-200mg/L, preferably in the waste water containing cadmium ion
200mg/L, back-ground electolyte NaNO3。
Preferably, the preparation method of the chicken manure charcoal the following steps are included:
(1) chicken manure is pre-processed, the pretreatment includes removal of impurities, natural air drying, crushing, sieving and drying；
(2) in N2Under protection, the pretreated chicken manure is pyrolyzed, chicken manure charcoal is obtained.
In above-mentioned steps (1), natural air drying refers to fresh chicken manure is collected after, natural air drying；Removal of impurities refers to removal
The impurity such as stone, feather in chicken manure；Sieving is to remove smashed coarse granule, is conducive to the pyrolysis in later period, makes its pyrolysis
More sufficiently.
In above-mentioned steps (2), in N2Under protection, the chicken manure that step (1) obtains is put in Muffle furnace and is pyrolyzed, heat
60 DEG C are cooled to after the completion of solution hereinafter, taking out black solid product obtained, the black solid product being prepared is
Chicken manure charcoal (Biochar, abbreviation BC).
The biological carbon surface prepared using chicken manure as raw material have the duct of comparison rule, similar honeycomb micropore, distribution compared with
The features such as uniform.
The present invention first simply pre-processes chicken manure, and then chicken manure charcoal can be obtained in pyrolysis under anaerobic
Adsorbent material, the preparation method have simple process, and raw material sources are extensive, low in cost, highly-safe, sharp useless environmental protection etc. is excellent
Gesture.
Ash content is the part lost after high temperature sintering under aerobic conditions, and more salt ion is contained in ash content, can with again
Displacement reaction occurs for metal ion to be removed, and therefore, in aerobic conditions preparation process, the grey branch of charcoal is by high
Warm calcination and be lost, content of ashes is smaller, and absorption property also can decrease.Therefore, the method for the present invention is protected in nitrogen
It is carbonized under shield, the biggish ash content of holding of meeting as much as possible makes it have preferable absorption property.
The method of the present invention carries out recycling treatment to chicken manure, prevents and eliminate fecal pollution, and makes full use of chicken manure biological
Matter, being pyrolyzed is charcoal, under anaerobic by a kind of high rich in pore structure, phosphorus content of converting formation
Solid matter is pyrolyzed institute because having the physicochemical properties such as flourishing pore structure, exhibiting high surface charge and surface functional group abundant
The charcoal obtained is a kind of solid matter of height aromatization, and short texture is porous, large specific surface area, and there are also hydroxyl, carbonyls etc.
There is preferable adsorptivity in functional group to metal ion, organic matter, nitrogen, phosphorus etc., and is considered as a kind of good adsorption material
Material.And the features such as yield, physical structure and surface chemical structure of biomass carbon are mainly influenced by cracking temperature, and heat is improved
Cracking temperature, yield, the element ratios such as nitrogen hydrogen reduce, but can promote the aromatisation of biomass carbon, increase specific surface area, improve
Its adsorption capacity, enhancing surface hydrophobic etc..
Preferably, the temperature of the drying is 100-150 DEG C, more preferable 120 DEG C.
Preferably, the initial temperature of the pyrolysis is 60 DEG C, heating-up time 1h.
Preferably, the temperature of the pyrolysis is 200-800 DEG C, the time of the pyrolysis is 1-3h.
Further preferably, the temperature of the pyrolysis is 200 DEG C, 400 DEG C, 600 DEG C or 800 DEG C, it is furthermore preferred that the pyrolysis
Temperature be 600 DEG C, time of the pyrolysis is 2h.
Preferably, the temperature of the absorption is 15-35 DEG C, more preferable 35 DEG C；The time of the absorption is 0-24h, more
It is preferred that 12h.
Preferably, the pH value is 4.5-6.5.It is furthermore preferred that the pH value is 4.5.
Preferably, pH value 0.1mol/L HNO3Or 0.1mol/L NaOH is adjusted.
After Cd (II) in chicken manure charcoal absorption waste water, filters, calculate, the chicken manure charcoal can be obtained to cadmium ion
Adsorption capacity.
Preferably, being calculated according to formula (1), the adsorption capacity of cadmium ion is obtained,
In formula (1), QeIt (mg/g) is the adsorption capacity of cadmium ion, CoIt (mg/L) is the initial concentration of removal of Cadmium from wastewater, Ce
It (mg/L) is the equilibrium concentration of removal of Cadmium from wastewater, V (L) is the volume of the waste water containing cadmium ion；M (g) is chicken manure charcoal
Quality.
Adsorption dynamics adsorption kinetics balance result of the Cd (II) on chicken manure charcoal meets quasi- second order dynamic model.200 DEG C,
The chicken manure charcoal being pyrolyzed at 400 DEG C, 600 DEG C and 800 DEG C is respectively 45.500mg/ to the maximum adsorption capacity of Cd (II)
G, 49.1667mg/g, 52.015mg/g and 49.335mg/g have above-mentioned data as it can be seen that the chicken manure being pyrolyzed at 600 DEG C is raw
Object charcoal is most strong to the adsorption capacity of Cd (II).The chicken manure charcoal being pyrolyzed at 600 DEG C to the adsorption capacity of Cd (II) most
Strong reason is that 800 DEG C are mainly made of aromatic carbon, shows the raising of pyrolysis temperature, charcoal weightlessness is more serious.
Adsorption isotherm is studies have shown that the balance result of chicken manure charcoal absorption Cd (II) meets Langmuir model.
Initial pH value is to Cd (II) influence adsorbed studies have shown that being pyrolyzed to obtain at 200 DEG C, 400 DEG C, 600 DEG C and 800 DEG C
The preferable ph for four kinds of chicken manure charcoals absorption Cd (II) arrived is 4.5-7.5, the absorption when pH value is 4.5, to Cd (II)
It is most advantageous.
The present invention can prevent and eliminate fecal pollution by carrying out recycling treatment to chicken manure and remove in waste water
Cadmium ion achievees the purpose that " circular economy, turns waste into wealth at the energy saving, treatment of wastes with processes of wastes against one another ".
Below in conjunction with specific embodiment, the invention will be further described, but is not to be construed as protecting model to the present invention
The limitation enclosed, some nonessential improvement that person skilled in art makes the present invention according to the content of aforementioned present invention and
Adjustment, still falls within protection scope of the present invention.
Embodiment 1
Present embodiments provide a kind of preparation method of chicken manure charcoal comprising following steps:
(1) after fresh chicken manure being removed impurity, natural air drying at room ventilation crosses 40 meshes；
(2) substance that step (1) obtains is put in corundum crucible, and placed it in Muffle furnace, in N2Under protection into
Row pyrolysis processing, pyrolysis temperature are respectively 200,400,600 and 800 DEG C, pyrolysis time 2h, and initial temperature is 60 DEG C, are risen
The warm time is 1h；
(3) after the completion of antipyretic, 60 DEG C is cooled to hereinafter, be drawn off, obtains black solid product, the black solid product
For chicken manure charcoal (BC)；
(4) after the chicken manure charcoal for obtaining step (3) is collected, fine gtinding is carried out in universal high speed disintegrator, and
It sieves with 100 mesh sieve, stores.The basic element of the chicken manure charcoal obtained under different temperatures forms, and is shown in Table 1.
The basic element of 1 chicken manure charcoal of table forms
Note: BC200, BC400, BC600, BC800 respectively represent 200 DEG C of preparation temperature, 400 DEG C, 600 DEG C, 800 DEG C of chicken
Excrement charcoal.
As shown in Table 1, the pH of chicken manure charcoal of the present invention, yield, ash content and element composition are advised with the variation of pyrolysis temperature
Rule.With the raising of pyrolysis temperature, the pH value of chicken manure charcoal is gradually increased, and yield gradually decreases, and ash content gradually increases, and works as heat
When solution temperature is 800 DEG C, yield is minimum, compares compared with 200 DEG C, and yield reduces 49.13%, and at a temperature of this, ash content highest is
64.63%.Carbon highest at 200 DEG C, it is minimum at 400 DEG C, then gradually increase again.
As shown in Figs. 1-5, the yield figure of chicken manure charcoal respectively of the present invention, bio-available Zn concentration figure, hot weight-differential heat are synchronous
Heat analysis (TG-DTA) figure and XRD analysis figure.
From fig. 1, it can be seen that the yield of chicken manure charcoal significantly reduces (P < 0.05) with the raising of pyrolysis temperature, with BC200
It compares, reduces 22.99%, 45.00% and 49.13% respectively.The yield highest of BC200, illustrates the biology of low temperature pyrogenation
The loss amount of charcoal is minimum.
As can be seen from Figure 2, by after chicken manure high temperature pyrolysis, heavy metal available state is reduced in chicken manure charcoal, and temperature is higher, weight
Metal bio-available Zn concentration is lower, and 600 DEG C of heavy metal bio-available Zn concentration is than the heavy metal bio-available Zn concentration drop in jungle fowl excrement (CK)
It is about 2-37 times low.
As can be seen from Figure 3, there is the weight loss of 38.58% inorganic residues.The burning weight loss loss process point of biomass
For three phases.First stage is room temperature to 200 DEG C, weightless 5.694%, on DTA figure corresponding to peak value be 84.8
℃.Second loss stage within the scope of 200-350 DEG C, at this time weightlessness 21.125%, at this time on DTA figure corresponding to peak value
It is 301.9 DEG C.Within the scope of 350-600 DEG C, weightless 5.291%, on DTA figure corresponding to peak value be 456.5 DEG C.
As can be seen from Figure 4, observe that main component is CaCO in XRD spectrum3And SiO2, KCl and other elements content compared with
It is few.Salt ion (Ca, Si, K etc.) content is more in the charcoal of high temperature preparation simultaneously, cation exchange capacity (CEC) with higher, so as to
Content of beary metal is reduced by ion exchange.
As can be seen from Figure 5, in charcoal using infrared spectroscopy to hydroxyl (- OH), carboxyl (- COOH), carbonyl (- C=O)
In the presence of being confirmed.With the raising of pyrolysis temperature, chicken manure charcoal absorption peak relative intensity is weaker, and individual peak disappears
It loses.Simultaneously organic compound being raised through decomposition and volatilize with pyrolysis temperature, eventually lead to disappearing for hydroxyl and alkane group
It loses.
Heavy metal adsorption experiment is carried out with the chicken manure charcoal of the obtained different pyrolysis temperatures of embodiment 1.
Carried out three batches of adsorption experiments using chicken manure charcoal to study: respectively adsorption dynamics adsorption kinetics research, different quality are dense
The absorption research of the lead solution of degree and pH influence research.By comparing the absorption effect under different adsorption times, pH and adsorption temp
Fruit, to filter out to heavy metal Pb2+The biomass carbon of the best preparation temperature of absorption.
Embodiment 2
As shown in Fig. 6-14, the present embodiment carries out weight with the chicken manure charcoal of the obtained different pyrolysis temperatures of embodiment 1
Metal adsorption experiment.
Carried out three batches of adsorption experiments using chicken manure charcoal to study: respectively adsorption dynamics adsorption kinetics research, isothermal adsorption are ground
Study carefully influences to study with pH.By comparing the adsorption effect under different adsorption times, pH and adsorption temp, to filter out to a huge sum of money
Belong to the biomass carbon of the best preparation temperature of Cd (II) absorption.
1, adsorption dynamics adsorption kinetics research: the chicken manure charcoal of 4g difference pyrolysis temperature is weighed respectively in 1L beaker, is added
1000mL 200mol·L-1Cd (II), with the NaNO of 0.01mol/L3As back-ground electolyte, with the HNO of 0.1mol/L3With
NaOH adjusts Cd (II) pH value of solution to 5.0；Respectively at sampling in the stipulated time, and measure Cd in filtrate (II) concentration.
The result shows that obtained chicken manure charcoal is maximum to the adsorbance of Cd (II) when pyrolysis temperature is 600 DEG C, remaining according to
Secondary is 800 DEG C > 400 DEG C > 200 DEG C.The chicken manure charcoal of different pyrolysis temperatures is shown in Table 2 to the equilibrium adsorption capacity of Cd (II).
Equilibrium adsorption capacity of the chicken manure charcoal of the different pyrolysis temperatures of table 2 to Cd (II)
| Processing | Equilibrium adsorption capacity Qe(mg/g) |
| BC200-Cd | 45.5000 |
| BC400-Cd | 49.1667 |
| BC600-Cd | 52.0150 |
| BC800-Cd | 49.3350 |
Note: BC200-Cd, BC400-Cd, BC600-Cd, BC800-Cd respectively represent 200 DEG C after absorption Cd (II), 400
DEG C, 600 DEG C, 800 DEG C of chicken manure charcoal.
As shown in Table 2, adsorption dynamics adsorption kinetics balance result of the Cd (II) on chicken manure charcoal meets quasi- second-order kinetics mould
Type.The maximum adsorption capacity of BC200, BC400, BC600 and BC800 are respectively 45.500mg/g, 49.1667mg/g,
52.015mg/g and 49.335mg/g.Obtained chicken manure charcoal is to the adsorbance highest of Cd (II) when pyrolysis temperature is 600 DEG C,
Reach 52.0150mg/g, remaining is followed successively by 800 DEG C > 400 DEG C > 200 DEG C.Illustrate in four kinds of different pyrolysis temperatures, BC600
To Cd2+Adsorption capacity it is best.
As can be seen from Figure 6, chicken manure charcoal is to heavy metal Cd2+Repair mechanisms may be due to chicken manure charcoal surface group
With heavy metal Cd2+Reaction forms the complex compound combined.
2, isothermal adsorption is studied: the chicken manure charcoal of 0.1g difference pyrolysis temperature is weighed in 50ml polypropylene centrifuge tube,
Cd (II) solution of 25mL different quality concentration, such as above-mentioned adjusting pH to 5.0 is added, shakes under conditions of 15,25,35 DEG C
12h is swung, after filtering, supernatant is taken, carries out Cd (II) concentration mensuration.
The result shows that chicken manure charcoal increases the adsorbance of Cd (II) with the raising of adsorption temp and mass concentration,
It is followed successively by 35 DEG C > 25 DEG C > 15 DEG C.
3, pH influences research: weighing 0.1g chicken manure charcoal in 50ml polypropylene centrifuge tube, it is different initial that 25ml is added
Cd (II) solution of pH value, with the NaNO of 0.01mol/L3As back-ground electolyte, 12h is vibrated under the conditions of 25 DEG C, after filtering
Supernatant is taken to carry out Cd (II) concentration mensuration.
Initial pH value is to Cd (II) influence adsorbed studies have shown that the optimum pH of four kinds of chicken manure charcoal absorption Cd (II)
For 4.5-7.5.It is most advantageous to the absorption of Cd (II) when pH value is 4.5.When initial pH value is 4.5, chicken manure charcoal is to Cd
(II) adsorbance is maximum, and with the increase of initial pH, after level off to balance.
From Figure 11 and Figure 12 it is found that by charcoal to the Raman spectrogram before and after the absorption of Cd (II) it is found that the G of BC600
The enhanced strength of peak intensity ratio BC800, this may be since more Cd (II) is reacted with the crystal of carbon-based material.The peak D
Intensity be lower than the peak G intensity, show that the crystal defect in material is extremely low.
From Figure 13 and Figure 14 it is found that by charcoal to the solid-state nuclear magnetic resonance figure before and after the absorption of Cd (II) it is found that 800 DEG C
It is mainly made of aromatic carbon, shows the raising of pyrolysis temperature, charcoal weightlessness is more serious.Individual peak intensities after adsorbing Cd (II)
Increase, this may be caused by being chemically reacted as cadmium and carboxyl or carboxymethyl.
In conclusion by research chicken manure charcoal to heavy metal Cd2+Repair mechanisms, it is available to draw a conclusion:
(1) in four kinds of different pyrolysis temperatures of chicken manure charcoal, BC600 is to Cd2+Adsorption capacity it is best.
(2)Cd2+Adsorption dynamics adsorption kinetics balance result on chicken manure charcoal meets quasi- second order dynamic model, BC
200, the maximum adsorption capacity of BC400, BC600 and BC800 be respectively 45.500mg/g, 49.1667mg/g, 52.015mg/g and
49.335mg/g。
(3) adsorption isotherm is studies have shown that chicken manure charcoal adsorbs Cd2+Balance result meet Langmuir model.
(4) initial pH value is to Cd2+The influence of absorption is studies have shown that four kinds of chicken manure charcoals adsorb Cd2+Optimum pH be
4.5-7.5.When pH value is 4.5, to Cd2+Absorption it is most advantageous.
By comparing the adsorption effect under different adsorption times, pH and adsorption temp it is found that being adsorbed to heavy metal Cd (II)
Optimal chicken manure charcoal pyrolysis temperature be 600 DEG C, pH value 4.5, adsorption temp be 35 DEG C.
Pyrolysis temperature has significant impact to the property of chicken manure charcoal.After chicken manure high temperature pyrolysis, chicken manure charcoal
Middle heavy metal available state reduces, and temperature is higher, and heavy metal bio-available Zn concentration is lower.The yield of chicken manure charcoal is with pyrolysis temperature
Increase and reduce, opposite rule is presented in ash content.Chicken manure charcoal surface roughness after high temperature pyrolysis increases, porosity,
Salt ion increases.
The embodiment of the present invention also compares adsorption effect of the different adsorbent materials to heavy metal Cd (II), is shown in Table 3.
Adsorption effect of the different adsorbent materials of table 3 to heavy metal Cd (II)
| Prepare material | Heavy metal | Adsorbance (mg/g) |
| Peat moss | Cd(Ⅱ) | 39.8 |
| Screwbean mesquite shell | Cd(Ⅱ) | 38.3 |
| Screwbean mesquite shell | Cd(Ⅱ) | 29.9 |
| Cow dung | Cd(Ⅱ) | 31.9 |
| H2SO4Modified meerschaum | Cd(Ⅱ) | 27.5 |
| Sulfhydryl modified rice straw charcoal | Cd(Ⅱ) | 35.1 |
| Rice straw | Cd(Ⅱ) | 13.9 |
| Wheat straw | Cd(Ⅱ) | 15.7 |
| Broomcorn straw | Cd(Ⅱ) | 13.32 |
| Peanut shell | Cd(Ⅱ) | 6 |
| Dento liva | Cd(Ⅱ) | 11.72 |
| Mangosteen shell | Cd(Ⅱ) | 3.15 |
| Rapeseed | Cd(Ⅱ) | 5.60 |
| Palm petiole | Cd(Ⅱ) | 10.8 |
As shown in Table 3, it was found that, chicken manure charcoal of the invention is higher than other adsorption materials to the adsorbance of Cd (II)
Material, it is seen then that the absorption property of chicken manure charcoal of the invention is better than other adsorbent materials.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, this hair is still fallen within
In the range of bright technical solution.
Claims (10)
1. a kind of method using chicken manure charcoal Adsorption removal of Cadmium from wastewater characterized by comprising by chicken manure biology
It after charcoal grinds and is sieved, is mixed with the waste water containing cadmium ion, adjusts pH value, adsorbed；Wherein, the chicken manure charcoal is chicken
Excrement is obtained through high temperature pyrolysis under anaerobic.
2. the method according to claim 1 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
In the waste water containing cadmium ion, the mass concentration of cadmium ion is 5-200mg/L, back-ground electolyte NaNO3。
3. the method according to claim 1 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
The preparation method of the chicken manure charcoal includes:
Chicken manure is pre-processed, the pretreatment includes removal of impurities, natural air drying, crushing, sieving and drying；
In N2Under protection, the pretreated chicken manure is pyrolyzed, chicken manure charcoal is obtained.
4. the method according to claim 3 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
The temperature of the drying is 100-150 DEG C.
5. the method according to claim 3 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
The initial temperature of the pyrolysis is 60 DEG C, heating-up time 1h.
6. the method according to claim 3 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
The temperature of the pyrolysis is 200-800 DEG C, and the time of the pyrolysis is 1-3h.
7. the method according to claim 1 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
The temperature of the absorption is 15-35 DEG C, and the time of the absorption is 0-24h.
8. the method according to claim 1 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
The pH value is 4.5-6.5.
9. the method according to claim 1 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, which is characterized in that
PH value 0.1mol/L HNO3Or 0.1mol/L NaOH is adjusted.
10. the method according to claim 1 using chicken manure charcoal Adsorption removal of Cadmium from wastewater, feature exist
In, it is calculated according to formula (1), obtains the adsorption capacity of cadmium ion,
In formula (1), QeIt (mg/g) is the adsorption capacity of cadmium ion, CoIt (mg/L) is the initial concentration of removal of Cadmium from wastewater, Ce(mg/
It L is) equilibrium concentration of removal of Cadmium from wastewater, V (L) is the volume of the waste water containing cadmium ion；M (g) is the quality of chicken manure charcoal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910198669.9A CN109879352A (en) | 2019-03-15 | 2019-03-15 | A method of utilizing chicken manure charcoal Adsorption removal of Cadmium from wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910198669.9A CN109879352A (en) | 2019-03-15 | 2019-03-15 | A method of utilizing chicken manure charcoal Adsorption removal of Cadmium from wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109879352A true CN109879352A (en) | 2019-06-14 |
Family
ID=66932573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910198669.9A Pending CN109879352A (en) | 2019-03-15 | 2019-03-15 | A method of utilizing chicken manure charcoal Adsorption removal of Cadmium from wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109879352A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564433A (en) * | 2019-09-19 | 2019-12-13 | 昆明理工大学 | Super-enriched plant-based biochar and preparation method and application thereof |
| CN111218286A (en) * | 2020-01-17 | 2020-06-02 | 上海理工大学 | Pigeon manure-based biochar material and preparation method and application thereof |
| CN111771445A (en) * | 2020-06-24 | 2020-10-16 | 四川华地康生态农业有限公司 | Soil improvement and fertility activation method |
| CN112547006A (en) * | 2019-09-10 | 2021-03-26 | 中国农业大学 | Sheep manure biochar and application thereof in heavy metal adsorption |
| CN112744928A (en) * | 2020-12-18 | 2021-05-04 | 江苏江达生态环境科技有限公司 | Microbial agent for purifying water body |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7794601B1 (en) * | 2004-04-07 | 2010-09-14 | The United States Of America, As Represented By The Secretary Of Agriculture | Pyrolytic products from poultry manure |
| CN105921110A (en) * | 2016-06-02 | 2016-09-07 | 环境保护部华南环境科学研究所 | Preparation method and application of cow dung biological carbon |
| CN108144581A (en) * | 2017-12-27 | 2018-06-12 | 湖南大学 | Alkali modification pig manure charcoal and its preparation method and application |
-
2019
- 2019-03-15 CN CN201910198669.9A patent/CN109879352A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7794601B1 (en) * | 2004-04-07 | 2010-09-14 | The United States Of America, As Represented By The Secretary Of Agriculture | Pyrolytic products from poultry manure |
| CN105921110A (en) * | 2016-06-02 | 2016-09-07 | 环境保护部华南环境科学研究所 | Preparation method and application of cow dung biological carbon |
| CN108144581A (en) * | 2017-12-27 | 2018-06-12 | 湖南大学 | Alkali modification pig manure charcoal and its preparation method and application |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112547006A (en) * | 2019-09-10 | 2021-03-26 | 中国农业大学 | Sheep manure biochar and application thereof in heavy metal adsorption |
| CN110564433A (en) * | 2019-09-19 | 2019-12-13 | 昆明理工大学 | Super-enriched plant-based biochar and preparation method and application thereof |
| CN111218286A (en) * | 2020-01-17 | 2020-06-02 | 上海理工大学 | Pigeon manure-based biochar material and preparation method and application thereof |
| CN111771445A (en) * | 2020-06-24 | 2020-10-16 | 四川华地康生态农业有限公司 | Soil improvement and fertility activation method |
| CN112744928A (en) * | 2020-12-18 | 2021-05-04 | 江苏江达生态环境科技有限公司 | Microbial agent for purifying water body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109879352A (en) | A method of utilizing chicken manure charcoal Adsorption removal of Cadmium from wastewater | |
| CN107983300B (en) | The charcoal composite material and preparation method and application of manganese dioxide modification | |
| CN110270310B (en) | Preparation method and application of magnesium-rich biochar for synchronously and efficiently recovering nitrogen and phosphorus nutrients in waste liquid of farm | |
| CN109926021A (en) | A kind of preparation method and applications of ball milling modification chicken manure charcoal | |
| CN105797693A (en) | Magnetic chaff charcoal for removing lead and cadmium in water and preparation and application method thereof | |
| CN110586036A (en) | Preparation method of composite modified biochar | |
| US20210213415A1 (en) | Preparation method of la(oh)3 nanorod/walnut shell biochar composite material | |
| CN110227416A (en) | A kind of preparation and its application in fluoroquinolone antibiotics removal in water of iron zinc and phosphoric acid modification sludge organism charcoal | |
| CN107213870A (en) | One kind carries magnesium charcoal and its preparation method and application | |
| CN111659351B (en) | Modified biological carbon capable of simultaneously releasing silicon and adsorbing heavy metals efficiently and preparation method thereof | |
| CN105170091A (en) | Preparation method of iron-modified reed biological carbon, and application of iron-modified reed biological carbon in treatment of phosphorus wastewater | |
| CN110142032B (en) | Chitosan biochar composite material and preparation method and application thereof | |
| CN106000334A (en) | Modified reed biomass charcoal and preparing method and application thereof | |
| CN108144581A (en) | Alkali modification pig manure charcoal and its preparation method and application | |
| CN110918055A (en) | Composite material for efficiently removing phosphorus in wastewater, preparation method and application thereof | |
| CN107362773A (en) | It is a kind of efficiently to remove heavy metal lead and cadmium mushroom bacteria residue charcoal adsorbent and preparation method thereof | |
| CN105598158B (en) | A kind of phosphorus base biological carbon materials and its preparation and application | |
| CN109225135A (en) | A kind of modification biological charcoal adsorbent material and preparation method thereof with to Pb in water body2+Removal application | |
| CN110423621A (en) | A kind of biomass composite, preparation method and its application | |
| CN105776796A (en) | Method of reducing heavy metal bio-availability through pig manure pyrolysis and biochar application of pig manure | |
| Hamzah et al. | Extraction of hydroxyapatite from fish scales and its integration with rice husk for ammonia removal in aquaculture wastewater | |
| CN112980446B (en) | Preparation process and application of iron modified eggshell biochar capable of synchronously immobilizing cadmium and arsenic | |
| CN109678626A (en) | The soil conditioner and the preparation method and application thereof repaired for mercury pollution farmland | |
| CN109719123A (en) | A method of rice enrichment inorganic mercury and methyl mercury are reduced using sodium selenite modification biological charcoal | |
| CN108079949A (en) | The method that lead in water body is removed using magnetic pig manure charcoal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190614 |
|
| RJ01 | Rejection of invention patent application after publication |