CN107285451A - It is a kind of for active filter of water treatment plant's catalysis oxidation demanganization and preparation method thereof - Google Patents
It is a kind of for active filter of water treatment plant's catalysis oxidation demanganization and preparation method thereof Download PDFInfo
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- CN107285451A CN107285451A CN201710201214.9A CN201710201214A CN107285451A CN 107285451 A CN107285451 A CN 107285451A CN 201710201214 A CN201710201214 A CN 201710201214A CN 107285451 A CN107285451 A CN 107285451A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/206—Manganese or manganese compounds
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Abstract
The invention belongs to drinking water treatment technology field, specifically provide a kind of for active filter of water treatment plant's catalysis oxidation demanganization and preparation method thereof, then this method utilizes KMnO by the way that rubble sand is etched respectively under acid and alkalescence condition4By divalence Mn under the reaction condition of normal temperature2+It is oxidized to hydrated manganese oxide carried on quartz sand filter media.The oxide particle size that the preparation method is obtained is very thin, and colloidal state is presented, is easy to be attached to the quartz sand surface etched by soda acid under weak basic condition；This method normal-temperature operation, its surface hydroxyl enriches, and catalytic activity is good, Mn average to water inlet2+Concentration is in 0.56mg/L source water, and manganese average removal rate is up to 90.4%.The present invention prepares the active filter film with manganese catalysis oxidation ability, and preparation method is fairly simple, operation is easy, gained filtrate is to Mn2+The activity of catalysis oxidation is preferably.
Description
Technical field
Removed the present invention relates to drinking water treatment technology field, more particularly to one kind for water treatment plant's catalysis oxidation
Active filter of manganese and preparation method thereof.
Background technology
At present, there is manganese concentration over-standard phenomenon in many local underground water and the surface water, though manganese is needed by human micro
Element, but manganese can excessively cause a series of problem among production and domestic water：There is offending color in water, produces different
Taste, spot is formed on sanitary ware, clothing and industrial products；A series of diseases can be produced by drinking high manganese containing water for a long time, existing
Epidemiology report thinks that manganese can have damaging effect to nerve；Manganese can cause the deposit in water distribution system to be accumulated, its concentration
In more than 0.20mg/l, manganese often forms one layer of attachment on water pipe, causes pipe network to block.
Solubilised state Mn in water2+Removal technology it is very many, such as air oxidation, it is oxidizing (chlorine, chlorine dioxide, ozone,
Potassium permanganate etc.), alkalization method demanganization, film analysis (ion exchange, counter-infiltration), bioanalysis etc..Air oxidation process is due to O2Oxidation
Ability is weak, therefore efficiency is too low, therefore simple at present seldom with air oxidation application；Alkalization method demanganization needs to arrive the pH value regulation of water
Strong basicity, is adjusted back again after processing；It is oxidizing to need additionally to put into a large amount of oxidants, reaction speed quickly, but high expensive；
Film analysis method cost is high and operation maintenance management is complicated；Biological law technology is not adequate mature and stable.Current catalysis oxidation demanganization and
Bioanalysis demanganization is applied in many water factories using underground water as water source in the northern area of China.
MnO2There is catalysis oxidation Mn under certain condition2+Ability, Mn2+MnO can be formed after being oxidized again2, so
MnO2Regenerated, the oxidation demanganization ability with continuous-stable.Contain substantial amounts of MnO in natural manganese sand2, containing MnO2Amount is larger
Natural manganese sand can be catalyzed Mn2+Oxidation, but the high natural manganese sand filtrate price containing manganese is more expensive than common quartz sand a lot,
This its application in engineering of limit value to a certain degree.Current domestic many underground water demanganization process are using aeration catalytic oxidation
Method, that is, first pass through aeration and be oxygenated into water, made in water with the Mn of solubilised state2+Removed in subsequent touch oxidation filter tank, and
Its mechanism removed is exactly the MnO to be formed2There is self-catalysis ability.
In air oxidation process, it has been found that as the formation activity MnO on carrier2During filter membranous layer, the filter membrane is to Mn2+Have compared with
Fast catalysis oxidation ability, accordingly even when the oxygen in air can also rapidly and efficiently aoxidize Mn2+, and this exactly grows shape on filter membrane
Into with high oxide (the mainly MnO of manganese2Or Mn3O4Or the composite oxides of a variety of Mn oxides).This active filter film
Presence greatly accelerate Mn2+Oxidation, it might even be possible to realize Quick Oxidation in neutral conditions, and during oxidant is exactly air
Oxygen, this active filter film is referred to as " manganese matter active filter film ".Generally, this manganese matter active filter film maturity period needs tens of days,
During filter membrane is ripe, the Process for Effluent of common quartz sand filter media typically can not be up to standard.
Jilin university Zhang Fengjun et al. provides the preparation method that a kind of potassium permanganate is modified demanganization filtrate before this, is to utilize
High-temperature calcination potassium permanganate, potassium permanganate is decomposed to form manganese dioxide, and such a method can be caused due to preparation process high-temperature calcination
Manganese dioxide surface is dried out, and have impact on its catalytic activity.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of for water treatment plant's catalysis oxidation demanganization
Active filter and preparation method thereof, to solve, the existing contact oxidation filter for manganese removal maturity period is long and manganese sand is expensive scarce
Fall into.
The present invention is achieved by the following technical solutions：
The invention provides a kind of preparation method of the active filter for water treatment plant's catalysis oxidation demanganization, including following step
Suddenly：Using quartz sand as raw material, it is that acid modification agent carries out acid etching first with HCl, recycles NaOH to enter for basic modifier
Row alkaline etch, then uses MnSO4Quartz sand after solution dipping acid alkaline etching, adds the KMnO of equivalent4, adjust pH=
7.5, carry out load hydration MnO2Processing, now, quartz sand surface formation have manganese matter active filter film, finally, after overlay film
Quartz sand washes clean, after drying or calcining, obtains the active material, specifically includes following steps：
(1) it is that 7.3%HCl dippings carry out acid etching for 48 hours with mass ratio by quartz sand, takes out, drain liquid；
(2) after the quartz sand after step (1) processing is washed for several times with mass ratio for 1% NaOH solution, mass ratio is used
Impregnated 24 hours for 4% NaOH solution, then take out quartz sand, distilled water washing, after draining or drying, be placed into Muffle furnace
It is interior, calcine 2 hours for 600 DEG C in air atmosphere, natural cooling；
(3) quartz sand after step (2) processing is submerged in MnSO4In solution, 2h is impregnated；
(4) in the MnSO of step (3)4The KMnO of equivalent is added in solution4Solution, regulation pH is 7.5, stirring reaction
After 0.5h, reaction solution is discarded, the quartz sand of overlay film is obtained；
(5) the overlay film reaction of repeat step (3)-(4), to increase water and manganese dioxide load amount；
(6) by after the quartz sand washing of step (5) overlay film, dry naturally or by calcining, obtain active filter.
Further, the particle diameter of the quartz sand is d10=0.9-1.2mm.
Further, the MnSO4The concentration of solution is 0.15mol/L, KMnO4The concentration of solution is 0.100-
0.101mol/L, the MnSO4The addition volume of solution is equal to MnSO4The volume of solution, potassium permanganate and manganese sulfate equivalent are anti-
Should, medicament prepares cost low without waste.
Further, in the dipping process of the step 3, continue to be stirred with 30rpm speed.
Further, the washing step of the step 5 is：First wash with mass ratio for 1% NaOH solution, then with steaming
Distilled water is washed.
Present invention also offers a kind of active filter for water treatment plant's catalysis oxidation demanganization, the active filter is to utilize
What the above method was prepared.
Present invention also offers application of the above-mentioned active filter in sewage disposal process.
The present invention principle be：The present invention, using quartz sand as raw material, is that acid modification agent carries out acid etching using HCl,
It is that basic modifier carries out alkaline etch using NaOH, then utilizes KMnO4It is quick using potassium permanganate close under neutral pH
With the Mn dissolved in water2+Reaction, by divalence Mn2+It is oxidized to hydration Mn oxide (MnO2·H2O), and acid is discharged：2KMnO4+
3Mn2++2H2O=5MnO2+2K++4H+, the manganese dioxide newly formed exists with hydrated form, and granularity is very thin, and colloidal attitude is presented,
Quartz sand surface is liable to stick to, manganese matter active filter film is formed.
The present invention has advantages below compared with prior art：It is used for water treatment plant's catalysis oxidation demanganization the invention provides one kind
Active filter and preparation method thereof, this method utilizes Gao Meng by the way that quartz sand is etched respectively under acid and alkalescence condition
The Mn of sour potassium quickly with being dissolved in water2+Reaction generation water and Mn oxide, and quartz sand surface is attached to, being formed, there is manganese matter to live
The active filter of property filter membrane.The present invention is operated at normal temperatures, and preparation method is simple, preparing speed, fast, raw material are easy to get.Prepared
Cheng Zhong, potassium permanganate reacts with manganese sulfate equivalent, and medicament prepares cost low without waste.The active filter prepared is kept
The abundant hydroxyl on manganese dioxide surface, maintains high catalytic activity, with the active filter film filtrate obtained by longtime running
Compared to similar catalytic activity, better catalytic activity.
Brief description of the drawings
Fig. 1 is cylindrical reactor effluent quality data under the conditions of nature dries；
Fig. 2 is cylindrical reactor effluent quality data under 600 DEG C of calcination conditions；
Fig. 3 is an adsorpting data figure of manganese load quartz sand filter media under different calcining heats；
Fig. 4 is the X ray diffracting data of manganese load quartz sand filter media under different calcining heats；
Fig. 5 is quartz sand (B) after former quartz sand (A), soda acid etching and loads quartz sand filter media (C) after manganese dioxide
SEM pictures.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementations
Example.
Embodiment 1
Present embodiments provide it is a kind of for active filter of water treatment plant's catalysis oxidation demanganization and preparation method thereof, including with
Lower step：
(1) acid etching：Using particle diameter as d10=0.9-1.2mm rubble sand is raw material, is with mass ratio by quartz sand
7.3%HCl, which impregnates, carries out acid etching for 48 hours, takes out, drains liquid；
(2) alkaline etch：After quartz sand after step (1) processing is washed for several times with mass ratio for 1% NaOH solution,
Impregnated 24 hours for 4% NaOH solution with mass ratio, then take out quartz sand, distill water washing, after draining or drying, placed
Into Muffle furnace, calcine 2 hours for 600 DEG C in air atmosphere, natural cooling；
(3) quartz sand after step (2) processing is submerged in the MnSO that concentration is 0.15mol/L4In solution, 2h is impregnated,
In dipping process, persistently it is slowly stirred；
(4) in the MnSO of step (3)4The KMnO that isometric concentration is 0.100-0.101mol/L is added in solution4It is molten
Liquid, is adjusted after pH to 7.5, stirring reaction 0.5h for 10% NaOH with mass ratio, discards reaction solution, obtain the quartz of overlay film
Sand；
(5) overlay film of repeat step (3)-(4) reacts 2 times；
(6) quartz sand of step (5) overlay film first wash with mass ratio for 1% NaOH solution, then with distilling water washing,
Finally dry naturally, obtain active filter.
Embodiment 2
Present embodiments provide it is a kind of for active filter of water treatment plant's catalysis oxidation demanganization and preparation method thereof, including with
Lower step：
(1) quartz sand 5kg is taken to be put in Plastic Drum, its d10=0.9-1.2mm, quartz sand is impregnated with 7.3%HCl solution
48 hours, HCl solution was just fallen into oblivion after quartz sand, acidity etching, takes out quartz sand, drains liquid.
(2) it is that 1%NaOH solution is washed for several times with mass ratio by the quartz sand after step (1) processing, then uses mass ratio
Impregnated 24 hours for 4% NaOH solution, NaOH solution just falls into oblivion quartz sand, after dipping terminates, distillation water washing for several times, dry
It is dry, then calcined 2 hours at 600 DEG C, natural cooling.
(3) it is accurate to add the MnSO that concentration is 0.15mol/L4Solution 1325ml floods quartz sand, impregnates 2 hours, dipping
Shi Chixu is slowly stirred with 30rpm speed.
(4) the quantitative accurate KMnO for adding concentration for 0.100mol/L4Solution (being equal to chemical equivalent) 1325ml, uses quality
It is 7.5 or so than the NaOH solution regulation pH for 10%, is slowly stirred after 0.5h, discards reaction solution, obtain the quartz sand of overlay film.
(5) overlay film of repeat step (3)-(4) reacts 2 times.
(6) quartz sand of overlay film is first washed with mass ratio for 1% NaOH solution, then with water washing is distilled, certainly finally
So dry, obtain active filter.
Demanganization performance detection：
Source water is passed through into 20min aeration removing irons, then coagulation, 1h precipitations, common 0.55mm quartz sand filtrations by simulation
After processing, into a diameter of 50mm, a height of 1.2m reactor, the interior activity filter prepared filled with the above method of reactor
Material, packed height is 1.0m.Water inlet Mn2+Concentration (mean concentration 0.561mg/L) between 0.39~0.87mg/L, flow is
20L/h, continuous operation 45 days is rinsed once for every 5 days.Daily test water outlet Mn2+Concentration once, as a result as shown in figure 1, numerical value exists
Between 0.01~0.12mg/L outside [monitoring limit value is 0.01mg/L], depolarization respective time, water outlet manganese concentration almost all is up to standard,
Average demanganization rate reaches 90.4% during monitoring.
After the reaction time of one and a half months, the work of the catalytic performance, as a result the present embodiment of active filter is detected again
Property filtrate catalytic performance there is no significant change, illustrate media performance relatively stablize, self-assembling formation is aoxidized by manganese while also illustrate that
Active filter film process is slower, otherwise for the relatively low filter membrane of activity, should be observed by the reaction time of one and a half months
Activity is dramatically increased.
Embodiment 3
Present embodiments provide it is a kind of for active filter of water treatment plant's catalysis oxidation demanganization and preparation method thereof, including with
Lower step：
(1) quartz sand 5kg is taken to be put in Plastic Drum, its d10=0.9-1.2mm, quartz sand is impregnated with 7.3%HCl solution
48 hours, HCl solution was just fallen into oblivion after quartz sand, acidity etching, takes out quartz sand, drains liquid；
(2) it is that 1%NaOH solution is washed for several times with mass ratio by the quartz sand after step (1) processing, then uses mass ratio
Impregnated 24 hours for 4% NaOH solution, NaOH solution just falls into oblivion quartz sand, after dipping terminates, distillation water washing for several times, dry
It is dry, then calcined 2 hours at 600 DEG C, natural cooling.
(3) it is accurate to add the MnSO that concentration is 0.15mol/L4Solution 1325ml floods quartz sand, impregnates 2 hours, dipping
Shi Chixu is slowly stirred with 30rpm speed.
(4) the quantitative accurate KMnO for adding concentration for 0.101mol/L4(a little higher than chemical equivalent, concentration exceedes to be changed solution
Metering 1%) 1325ml is learned, the NaOH solution for being 10% with mass ratio regulation pH is 7.5 or so, is slowly stirred after 0.5h, discards
Reaction solution, obtains the quartz sand of overlay film.
(5) overlay film of repeat step (3)-(4) reacts 2 times；
(6) quartz sand of overlay film is first washed with mass ratio for 1% NaOH solution, then with water washing is distilled, certainly finally
After so drying, 1h is calcined at 600 DEG C, active filter is obtained.
Demanganization performance detection：
Source water passes through 20min aeration removing irons, then coagulation by simulation, 1h precipitations, at common 0.55mm quartz sand filtrations
After reason, into a diameter of 50mm, a height of 1.2m reactor, the interior activity filter prepared filled with the above method of reactor
Material, packed height is 1.0m.Water inlet Mn2+In 0.39~0.87mg/L, (mean concentration 0.561mg/L's concentration originates with embodiment 2
It is identical), continuous operation 45 days is rinsed once for every 5 days.Daily test water outlet Mn2+Concentration once, as a result as shown in Fig. 2 numerical value exists
Between 0.17~0.47mg/L, average value 0.269mg/L, average removal rate only 52.5%, water outlet manganese concentration can not be up to standard, says
Bright calcining can significantly reduce the catalytic performance of active filter film.
After the reaction time of one and a half months, the catalytic performance of active filter is detected again, as a result for the present embodiment
Active filter catalytic performance slightly some improve, it may be possible to the filter membrane part newly formed covers former filter membrane, and the filter newly formed
Film activity is higher than former filter membrane.
Embodiment 4
Present embodiments provide it is a kind of for active filter of water treatment plant's catalysis oxidation demanganization and preparation method thereof, including with
Lower step：
(1) quartz sand 0.500kg is taken to be put in 500ml beakers, its d10=0.9-1.2mm, by quartz sand 7.3%HCl
Solution impregnates 48 hours, and HCl solution is just fallen into oblivion after quartz sand, acidity etching, takes out quartz sand, drains liquid；
(2) it is that 1%NaOH solution is washed for several times with mass ratio by the quartz sand after step (1) processing, then uses mass ratio
Impregnated 24 hours for 4% NaOH solution, NaOH solution just falls into oblivion quartz sand, after dipping terminates, distillation water washing for several times, dry
It is dry, then calcined 2 hours at 600 DEG C, natural cooling.
(3) it is accurate to add the MnSO that concentration is 0.15mol/L4Solution 150ml floods quartz sand, impregnates 2 hours, during dipping
Continue to be slowly stirred with 30rpm speed.
(4) the quantitative accurate KMnO for adding concentration for 0.100mol/L4Solution 150ml, with the NaOH that mass ratio is 10%
Solution regulation pH is 7.5 or so, is slowly stirred after 0.5h, discards reaction solution, obtains the quartz sand of overlay film.
(5) overlay film of repeat step (3)-(4) reacts 2 times；
(6) quartz sand of overlay film first wash for several times with mass ratio for 1% NaOH solution, then with distilling water washing number
It is secondary, obtain wet feed.
Test example 1：Calcine the influence to active filter demanganization ability：
The wet feed that embodiment 4 is obtained is divided into 4 parts, handles in accordance with the following steps respectively：A. dry naturally；B. at 300 DEG C
Lower calcining 1 hour；C. calcined 1 hour at 450 DEG C；D. calcined 1 hour at 600 DEG C.
Four 1L beakers are taken, above-mentioned each 2.00g of A, B, C, D sample is separately added into, distilled water 990ml (reaction volumes are added
For 1L), it is 1.500g/L manganese sulfate solution 10.00ml then to add concentration, and 5.4mg/L is reached equivalent to manganese ion concentration in water
(approximation), stirs test manganese concentration after 24h, natural sedimentation 1h in six coagulation agitators, meanwhile, only to pass through step
(1)-(2) quartz sand after soda acid etching processing is negative control (roughing sand).
As a result as shown in figure 3, it can be seen from the figure that, only by a soda acid handle and without overload MnO2The quartz sand of processing
Only extremely slight absorption manganese ability (clearance about 2% can be neglected), and load the quartz sand tool of hydrated manganese dioxide
There is obvious absorption manganese ability, and calcining heat increase can also reduce it to Mn2+Adsorption capacity.Naturally the removal of sample manganese is dried
Rate calcines the sample of 1 hour up to 88% at 600 DEG C, manganese clearance is less than 10%.
Test example 2：Calcine the influence characterized to filtrate
With test example 1, the wet feed that embodiment 4 is obtained is divided into 4 parts, handled in accordance with the following steps respectively：A. dry naturally；
B. calcined 1 hour at 300 DEG C；C. calcined 1 hour at 450 DEG C；D. calcined 1 hour at 600 DEG C.
The thing phase of above-mentioned four kinds of materials is determined using D/max-rA types X-ray diffractometer (RIGAKU, JAPAN), sample is obtained
The XRD spectra (X-ray diffractogram) of product.The θ of scanning range 2 is from 10 ° to 70 °, range 1000cps, Cu target x-ray source, graphite list
Color device light splitting, λ=0.154187nm.
As a result as shown in figure 4, from fig. 4, it can be seen that the XRD of several filtrates is almost without difference.Dioxy is hydrated with nascent state
Change manganese and be mainly that amorphous article is mutually different, filtrate is the manganese dioxide of crystal habit, and whether calcine not and have an impact thing phase
Composition, illustrates that calcining causes the reduction of manganese dioxide absorption property to be not as caused by thing phase change, and is probably surface hydroxyl
Caused by the reduction of quantity, calcining is general to also result in the reduction of BET areas, should also be the main original for causing absorption property to reduce
Therefore one.
Test example 3：The phenetic analysis of quartz sand under the different disposal stage
Using JSM-7500F types SEM (JEOL, Japan), to the original quartz in the processing procedure of embodiment 4
The pattern of the quartz sand filter media (wet feed) after quartz sand and load manganese dioxide after sand, soda acid etching carries out sampling analysis, sample
Product are observed after directly carrying out metal spraying pretreatment in the case of undried, the SEM pictures of collection sample.
As a result as shown in figure 5, as seen from Figure 5, compared with roughing sand, soda acid is etched to be influenceed not on the surface topography of quartz sand
Substantially, but after overlay film reacts granularity very thin surface coating is formd, this layer is hydrated manganese dioxide, quartz sand
Pattern originally is completely covered, and a thick layer of activated manganese dioxide layer is covered equivalent in quartz sand surface, but above
Also there are some irregular particles.
Be above a kind of detailed embodiment of the invention and specific operating process, be using technical solution of the present invention before
Put and implemented, but protection scope of the present invention is not limited to the above embodiments.
Claims (8)
1. the preparation method of a kind of active filter for water treatment plant's catalysis oxidation demanganization, it is characterised in that comprise the following steps：
Step one：It is that acid modification agent carries out acid etching using HCl using quartz sand as raw material；
Step 2：It is that basic modifier carries out alkaline etch using NaOH；
Step 3：Use MnSO4Quartz sand after solution dipping acid alkaline etching；
Step 4：Add the KMnO of equivalent4, pH=7.5 is adjusted, load hydration MnO is carried out2Processing；
Step 5：After washing, dry or calcine naturally, obtain the active material.
2. a kind of preparation method of active filter for water treatment plant's catalysis oxidation demanganization according to claim 1, it is special
Levy and be, comprise the following steps：
(1) it is that 7.3%HCl dippings carry out acid etching for 48 hours with mass ratio by quartz sand, takes out, drain liquid；
(2) it is 4% with mass ratio after the quartz sand after step (1) processing is washed for several times with mass ratio for 1% NaOH solution
NaOH solution impregnate 24 hours and carry out alkaline etch, then take out quartz sand, distill water washing, after draining or dry, placement
Into Muffle furnace, in air atmosphere 600 DEG C calcining 2 hours after, natural cooling；
(3) quartz sand after step (2) processing is submerged in MnSO4In solution, 2h is impregnated；
(4) in the MnSO of step (3)4The KMnO of equivalent is added in solution4Solution, regulation pH is 7.5, after stirring reaction 0.5h,
Reaction solution is discarded, the quartz sand of overlay film is obtained；
(5) the overlay film reaction of repeat step (3)-(4), to increase hydrated manganese dioxide load capacity；
(6) by after the quartz sand washing of step (5) overlay film, dry naturally, obtain active filter.
3. a kind of preparation method of active filter for water treatment plant's catalysis oxidation demanganization according to claim 1, it is special
Levy and be, the particle diameter of the quartz sand is d10=0.9-1.2mm.
4. a kind of preparation method of active filter for water treatment plant's catalysis oxidation demanganization according to claim 1, it is special
Levy and be, the MnSO4The concentration of solution is 0.15mol/L, KMnO4The concentration of solution is 0.100-0.101mol/L, described
MnSO4The addition volume of solution is equal to MnSO4The volume of solution.
5. a kind of preparation method of active filter for water treatment plant's catalysis oxidation demanganization according to claim 1, it is special
Levy and be, in the dipping process of the step 3, continue to be stirred with 30rpm speed.
6. a kind of preparation method of active filter for water treatment plant's catalysis oxidation demanganization according to claim 1, it is special
Levy and be, the washing step of the step 5 is：First wash with mass ratio for 1% NaOH solution, then with distilling water washing.
7. a kind of active filter for water treatment plant's catalysis oxidation demanganization, it is characterised in that the active filter is utilized as weighed
Profit requires what 1-6 either method was prepared.
8. a kind of application of active filter as claimed in claim 7 in sewage disposal process.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110697786A (en) * | 2019-11-01 | 2020-01-17 | 四川中哲新材料科技有限公司 | Preparation method of mangano-manganic oxide |
| CN114163025A (en) * | 2021-12-11 | 2022-03-11 | 北京工业大学 | Enhanced starting method of gravity type ultrafiltration demanganization process based on potassium permanganate pre-oxidation |
| CN114275819A (en) * | 2021-12-16 | 2022-04-05 | 湖南化工研究院有限公司 | Efficient recovery method of active manganese dioxide |
| CN114560517A (en) * | 2022-03-08 | 2022-05-31 | 西安工程大学 | Rapid starting method for realizing filter tank for synchronously removing ammonia nitrogen and manganese in water by catalysis |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110697786A (en) * | 2019-11-01 | 2020-01-17 | 四川中哲新材料科技有限公司 | Preparation method of mangano-manganic oxide |
| CN114163025A (en) * | 2021-12-11 | 2022-03-11 | 北京工业大学 | Enhanced starting method of gravity type ultrafiltration demanganization process based on potassium permanganate pre-oxidation |
| CN114163025B (en) * | 2021-12-11 | 2023-09-26 | 北京工业大学 | Enhanced starting method of gravity type ultrafiltration demanganization process based on potassium permanganate pre-oxidation |
| CN114275819A (en) * | 2021-12-16 | 2022-04-05 | 湖南化工研究院有限公司 | Efficient recovery method of active manganese dioxide |
| CN114275819B (en) * | 2021-12-16 | 2024-03-01 | 湖南化工研究院有限公司 | Efficient recovery method of active manganese dioxide |
| CN114560517A (en) * | 2022-03-08 | 2022-05-31 | 西安工程大学 | Rapid starting method for realizing filter tank for synchronously removing ammonia nitrogen and manganese in water by catalysis |
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