CN111266084A - Porous aquatic plant-based biomass charcoal material and application thereof - Google Patents
Porous aquatic plant-based biomass charcoal material and application thereof Download PDFInfo
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- CN111266084A CN111266084A CN202010019083.4A CN202010019083A CN111266084A CN 111266084 A CN111266084 A CN 111266084A CN 202010019083 A CN202010019083 A CN 202010019083A CN 111266084 A CN111266084 A CN 111266084A
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- biomass charcoal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
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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
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Abstract
The invention discloses a porous aquatic plant-based biomass charcoal material and application thereof, wherein the charcoal material is prepared by cleaning, drying and grinding aquatic plants into powder; and (3) performing high-temperature treatment at 450 ℃ for 1-5 h, soaking the obtained biomass charcoal in a metal salt solution, standing for 24h, filtering, drying the obtained solid, and performing high-temperature treatment at 500 ℃ for 1-5 h to obtain the porous aquatic plant-based biomass charcoal material. The biomass charcoal material prepared by the invention has high-efficiency adsorption performance, and the surface-modified metal oxide can accelerate the photodegradation of the dye and improve the biodegradability of the printing and dyeing wastewater while adsorbing the dye in the printing and dyeing wastewater. The printing and dyeing wastewater after the biomass charcoal adsorption treatment is subjected to a biological treatment technology to reduce pollutants with high biochemical degree, and finally the effluent is discharged into an aquatic plant planting area to continue to plant aquatic plants so as to obtain a biomass charcoal source.
Description
Technical Field
The invention belongs to the technical field of application of biomass charcoal materials, and relates to a porous aquatic plant-based biomass charcoal material and application thereof.
Background
Pollution of dye in printing and dyeing wastewater to environment: the dye in the wastewater can absorb light, reduce the transparency of the water body, consume a large amount of oxygen in the water body, cause oxygen deficiency of the water body, influence the growth of aquatic organisms and microorganisms, damage the self-purification of the water body and easily cause visual pollution.
At present, the most main methods for adsorbing and decoloring dyes in printing and dyeing wastewater at home and abroad mainly comprise the following 5 methods: attapulgite adsorption method, activated carbon adsorption method, coal and cinder adsorption method, air flotation adsorption method and ion exchange method.
The currently used adsorbent materials mainly include activated carbon, biomass charcoal, activated alumina and the like, wherein the price of the adsorbing material such as alumina is more expensive than that of biomass charcoal, and the adsorbing material is not suitable for large-scale treatment of printing and dyeing wastewater, so that an adsorbent which is low in price, high in adsorption efficiency and large in adsorption capacity is urgently sought.
Disclosure of Invention
In order to overcome the defects of high price and the like of the current commercial adsorbent, the invention aims to provide the application of the porous eichhornia crassipes-based biomass charcoal material in the treatment of dye in printing and dyeing wastewater.
In one aspect, the invention provides a porous aquatic plant-based biomass charcoal material and a preparation method thereof, wherein the preparation method comprises the following steps:
a) biomass pretreatment
Cleaning the collected aquatic plants with ethanol and water respectively, putting the aquatic plants into an oven at 50-80 ℃ for drying, and then grinding the aquatic plants into powder to obtain dry pretreated aquatic plant powder;
b) preparation of porous aquatic plant-based biomass charcoal material
(1) Placing the pretreated aquatic plant powder in a muffle furnace to be treated at the high temperature of 450 ℃ for 1-5 h, washing the aquatic plant powder with distilled water, and drying the aquatic plant powder in a drying oven at the temperature of 50-80 ℃ to obtain aquatic plant-based biomass charcoal;
(2) adding 1-5 g of aquatic plant-based biomass charcoal into every 100 ml of metal salt solution, soaking the aquatic plant-based biomass charcoal in the metal salt solution, standing for 24 hours, separating the aquatic plant-based biomass charcoal from the metal salt solution, drying the aquatic plant-based biomass charcoal in an air-blast drying oven at 85 ℃ for 1 hour, and finally placing the aquatic plant-based biomass charcoal in a muffle furnace for high-temperature treatment at 500 ℃ for 1-5 hours to obtain the porous aquatic plant-based biomass charcoal material.
Preferably, the aquatic plant is Eichhornia crassipes.
Preferably, the metal salt solution is one of manganese chloride, ferric chloride and copper chloride solution, preferably manganese chloride solution.
The invention also provides application of the porous aquatic plant-based biomass charcoal material in dye decoloration treatment of printing and dyeing wastewater.
The printing and dyeing wastewater comprises acidic printing and dyeing wastewater and alkaline printing and dyeing wastewater, wherein the acidic printing and dyeing wastewater can be acidic red B and acidic fruit green, and the alkaline printing and dyeing wastewater can be alkaline pinkish green and alkaline fuchsin.
The invention also provides an internal circulation method of the aquatic plant in the dye for treating the printing and dyeing wastewater, the printing and dyeing wastewater after the biomass charcoal adsorption treatment is subjected to a biological treatment technology to reduce pollutants with high biochemical degree, finally, the effluent is discharged into the aquatic plant planting area to continue to plant the aquatic plant so as to obtain a biomass charcoal source, and the effluent is discharged after being purified by the aquatic plant for a period of time in the planting area. Thereby forming the internal circulation application of the aquatic plants in the dye for treating the printing and dyeing wastewater.
Compared with the prior art, the invention has the beneficial effects that:
(1) the raw materials of the invention are aquatic plants, the raw materials have wide sources, and the cheap material for adsorbing the dye in the printing and dyeing wastewater is prepared.
(2) The adsorbing material prepared by the invention has high-efficiency adsorption performance, and the photodegradation phenomenon of dye in printing and dyeing wastewater is accelerated in the adsorption process.
(3) And discharging the discharged water into an aquatic plant planting area to continuously plant aquatic plants so as to obtain a biomass charcoal source, thereby forming internal circulation application of the aquatic plants in treating the dye in the printing and dyeing wastewater.
(4) The porous aquatic plant matrix biomass material prepared by the metal salt activation modification disclosed by the invention has the advantages of controllable preparation process, adjustable components and no pollution to the environment.
Drawings
FIG. 1 is a scanning electron microscope image of activated and modified Eichhornia crassipes-based biomass charcoal.
FIG. 2 is a scanning electron microscope image of the activated and modified porous eichhornia crassipes-based biomass charcoal material.
Fig. 3 is an internal circulation flow chart of the activated and modified porous eichhornia crassipes-based biomass charcoal material.
Detailed Description
The present invention will be described in detail below with reference to examples to facilitate the understanding of the present invention by those skilled in the art, but the present invention is not limited to the following examples.
The following examples use green, non-polluting waste Eichhornia crassipes as the raw material. The material has simple preparation process and no secondary pollutant. The application of the invention mainly aims at the adsorption performance test of the printing and dyeing wastewater of the acid dye and the basic dye, and the prepared adsorption material has the advantages of excellent adsorption performance, low cost and simple preparation process, and conforms to the aim of green chemistry.
In the previous research, the adsorption performance is mainly controlled by the pore diameter of the biomass charcoal, but the invention finds in experiments that the biomass charcoal added with the metal salt has enhanced capability of treating the dye in the printing and dyeing wastewater under the illumination condition, because the biomass charcoal subjected to surface modification of the metal oxide accelerates the photodegradation of the dye in the printing and dyeing wastewater.
Example 1
a) Pre-treating water hyacinth:
cleaning the collected water hyacinth with ethanol and water respectively, putting the water hyacinth into an oven at 80 ℃ for drying, and then grinding the water hyacinth into powder to obtain dried pretreated water hyacinth powder;
b) preparing a porous eichhornia crassipes-based biomass charcoal material:
(1) placing the pretreated eichhornia crassipes powder in a muffle furnace for high-temperature treatment at 450 ℃ for 1-5 h, washing with distilled water, and drying in an oven at 50-80 ℃ to obtain eichhornia crassipes-based biomass charcoal, wherein a scanning electron microscope image of the eichhornia crassipes-based biomass charcoal is shown in figure 1;
(2) adding 1-4 g of eichhornia crassipes base biomass charcoal into each 100 ml of metal salt solvent, and soaking the eichhornia crassipes base biomass charcoal in V(Water)：V(Metal salt)In the solution with the ratio of 50:1, after standing the mixed sample for 24 hours, separating the eichhornia crassipes-based biomass charcoal from the solution. The eichhornia crassipes-based biomass charcoal is placed into an air-blast drying oven to be dried for 1h at 85 ℃, the dried sample is placed into a muffle furnace again to be subjected to high-temperature treatment for 1-5 h at 500 ℃, and the porous eichhornia crassipes-based biomass charcoal material is obtained, and a scanning electron microscope picture of the material is shown in figure 2.
c) Porous eichhornia crassipes-based biomass charcoal material for accelerating photodegradation of dye in printing and dyeing wastewater
When the printing and dyeing wastewater is adsorbed, 20ml of wastewater stock solution is placed in a beaker, and is stood in the sun for 40min, and then the wastewater is found to be degraded by natural light under the illumination condition by 0.2 mg/L. Secondly, adopting unmodified biomass charcoal to adsorb the biomass charcoal, putting 20ml of wastewater stock solution into a beaker, then putting 0.05g of unmodified biomass charcoal, namely common biomass charcoal, adsorbing for 40min under the natural illumination condition, performing suction filtration and separation on dye wastewater and the biomass charcoal after adsorption is finished, putting the suction-filtered wastewater into an ultraviolet spectrophotometer to measure the absorbance of the wastewater, and measuring the absorbance value to be 0.038, wherein the residual concentration Ce of the dye in the wastewater is 0.754mg/L, and the formula q is shown in the specificatione=
The equilibrium adsorption amount was calculated to be 3.655mg/g, and the adsorption amount of the biomass charcoal itself to the dye in the printing and dyeing wastewater was calculated to be 9.246 mg/L. Thirdly, 20ml of wastewater stock solution is put into a beaker, 0.05g of modified biomass charcoal, namely the porous eichhornia crassipes-based biomass charcoal material prepared by the invention, is added, and the mixture is naturally treatedAdsorbing for 40min under illumination, filtering and separating the dye wastewater from the carbon material, placing the filtered wastewater into an ultraviolet spectrophotometer to measure the absorbance, and obtaining the absorbance value of 0.025 and the residual concentration Ce of the dye in the wastewater of 0.289mg/L according to the formula qe=
The equilibrium adsorption amount is calculated to be 3.8844mg/g, and the adsorption amount of the carbon material to the dye wastewater is 9.711 mg/L. The experimental data of comparing the photodegradation rate of the dye with the adsorption amount of unmodified biomass carbon and the adsorption amount of the modified biomass carbon show that the biomass carbon material prepared by the invention can accelerate the photodegradation of printing and dyeing wastewater under the illumination condition.
d) Cyclic regeneration and utilization of water hyacinth
The carbon material prepared by the method is put into printing and dyeing wastewater in proportion under the illumination condition, pollutants with high biochemical degree are reduced by a biological treatment technology, the effluent is poured into a self-made water hyacinth planting tank after the treatment, the water hyacinth is continuously planted, observation shows that a large amount of water hyacinth grows and plants after one week, and when the wastewater is taken out and the residual concentration of the wastewater is measured again, the ultraviolet absorbance is only 0.0011, and the corresponding residual concentration of the dye is 0.1907 mg/L. Therefore, the treated wastewater is discharged into a planting area, on one hand, the water hyacinth grows, and on the other hand, the water hyacinth further treats the dye in the printing and dyeing wastewater.
The method is mainly applied to the decoloration treatment of dye in the printing and dyeing wastewater, the printing and dyeing wastewater after the biomass charcoal adsorption treatment is subjected to a biological treatment technology to reduce pollutants with high biochemical degree, finally the effluent is discharged into the aquatic plant cultivation area to continue cultivating the aquatic plants so as to obtain a biomass charcoal source, and the effluent is discharged after being purified by the aquatic plants for a period of time in the cultivation area. Thereby forming an internal loop as shown in fig. 3.
Claims (9)
1. A preparation method of a porous aquatic plant-based biomass charcoal material is characterized by comprising the following steps:
a) aquatic plant pretreatment
Cleaning aquatic plants with ethanol and water respectively, drying at 50-80 ℃, and grinding into powder to obtain dried pretreated aquatic plant powder;
b) preparation of porous aquatic plant-based biomass charcoal material
(1) Placing the pretreated aquatic plant powder at 450 ℃ for high-temperature treatment for 1-5 h, then washing with distilled water, and placing at 50-80 ℃ for drying to obtain the aquatic plant-based biomass charcoal;
(2) adding 1-5 g of aquatic plant-based biomass charcoal into every 100 ml of metal salt solution, soaking the biomass charcoal in the metal salt solution, standing for 24 hours, filtering and separating, drying the obtained solid at 85 ℃ for 1 hour after separation, and then treating at 500 ℃ for 1-5 hours to obtain the carbon material.
2. The method of claim 1, wherein the aquatic plant is Eichhornia crassipes.
3. The method of claim 1, wherein the metal salt solution is one of a manganese chloride, ferric chloride, and cupric chloride solution.
4. The method of claim 1, wherein the metal salt solution is a manganese chloride solution.
5. A porous aquatic plant-based biomass char material prepared by the method of any one of claims 1 to 4.
6. The use of the porous aquatic plant-based biomass charcoal material prepared by the method according to any one of claims 1 to 4 in the decolorization treatment of printing and dyeing wastewater.
7. The use of claim 6, wherein the printing waste water comprises acidic printing waste water and alkaline printing waste water.
8. The use of claim 6, wherein the acidic waste printing water comprises acidic red B and acidic fruit green, and the alkaline waste printing water comprises alkaline pinkish green and alkaline magenta.
9. The internal circulation method of the porous aquatic plant-based biomass charcoal material prepared by the method according to any one of claims 1 to 4, wherein the printing and dyeing wastewater subjected to biomass charcoal adsorption treatment is subjected to biological treatment technology to reduce pollutants with high biochemical degree, finally the effluent is discharged into the aquatic plant planting area to continue planting the aquatic plants so as to obtain a biomass charcoal source, and the effluent is purified by the aquatic plants in the planting area for a period of time and then discharged, so that the internal circulation application of the aquatic plants in the printing and dyeing wastewater treatment dye is formed.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701566A (en) * | 2020-06-30 | 2020-09-25 | 广东工业大学 | Adsorbent and preparation method and application thereof |
| CN112108111A (en) * | 2020-08-13 | 2020-12-22 | 常熟理工学院 | Porous maple sphere-based biomass charcoal material and application thereof |
| WO2023071355A1 (en) * | 2021-10-26 | 2023-05-04 | 广东邦普循环科技有限公司 | Wastewater adsorbent, and preparation method therefor and use thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780952A (en) * | 2010-03-26 | 2010-07-21 | 上海交通大学 | Method for preparing loading functional oxide porous carbon |
| CN103801262A (en) * | 2014-03-13 | 2014-05-21 | 南京大学 | Method for removing lead in polluted water by using aquatic plant biochar |
| CN105148842A (en) * | 2015-09-07 | 2015-12-16 | 河北师范大学 | Preparing method of manganese oxide-charcoal composite adsorbent |
| CN107983300A (en) * | 2016-10-27 | 2018-05-04 | 湖南大学 | Biological carbon composite of manganese dioxide modification and its preparation method and application |
| CN108160060A (en) * | 2017-10-27 | 2018-06-15 | 石狮纳通新材料科技有限公司 | A kind of preparation method and application of oyster shell powder cupric oxide nano composite material |
| CN109179554A (en) * | 2018-10-10 | 2019-01-11 | 湖南大学 | Utilize the method for fortimicin in manganese dioxide load biological carbon materials removal water body |
| CN109499530A (en) * | 2018-11-21 | 2019-03-22 | 常熟理工学院 | A kind of preparation method and applications of biomass active carbon nanometer composite material |
| CN110052232A (en) * | 2019-03-21 | 2019-07-26 | 常州大学 | A kind of high absorption property nanometer Cu2O ultrasonic wave added preparation method |
| CN110433789A (en) * | 2019-07-31 | 2019-11-12 | 武汉理工大学 | A method of photocatalysis biology carbon composite is prepared using Eichhornia crassipes accumulation nano zine oxide |
-
2020
- 2020-01-08 CN CN202010019083.4A patent/CN111266084A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780952A (en) * | 2010-03-26 | 2010-07-21 | 上海交通大学 | Method for preparing loading functional oxide porous carbon |
| CN103801262A (en) * | 2014-03-13 | 2014-05-21 | 南京大学 | Method for removing lead in polluted water by using aquatic plant biochar |
| CN105148842A (en) * | 2015-09-07 | 2015-12-16 | 河北师范大学 | Preparing method of manganese oxide-charcoal composite adsorbent |
| CN107983300A (en) * | 2016-10-27 | 2018-05-04 | 湖南大学 | Biological carbon composite of manganese dioxide modification and its preparation method and application |
| CN108160060A (en) * | 2017-10-27 | 2018-06-15 | 石狮纳通新材料科技有限公司 | A kind of preparation method and application of oyster shell powder cupric oxide nano composite material |
| CN109179554A (en) * | 2018-10-10 | 2019-01-11 | 湖南大学 | Utilize the method for fortimicin in manganese dioxide load biological carbon materials removal water body |
| CN109499530A (en) * | 2018-11-21 | 2019-03-22 | 常熟理工学院 | A kind of preparation method and applications of biomass active carbon nanometer composite material |
| CN110052232A (en) * | 2019-03-21 | 2019-07-26 | 常州大学 | A kind of high absorption property nanometer Cu2O ultrasonic wave added preparation method |
| CN110433789A (en) * | 2019-07-31 | 2019-11-12 | 武汉理工大学 | A method of photocatalysis biology carbon composite is prepared using Eichhornia crassipes accumulation nano zine oxide |
Non-Patent Citations (2)
| Title |
|---|
| SHARF ILAHI SIDDIQUI ET.AL: "Nigella sativa seed based nanocomposite-MnO2/BC: An antibacterial material for photocatalytic degradation, and adsorptive removal of dye from water", 《ENVIRONMENTAL RESEARCH》 * |
| 左卫元等: "生物炭/锰氧化物复合材料对苯甲酸的吸附研究", 《无机盐工业》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701566A (en) * | 2020-06-30 | 2020-09-25 | 广东工业大学 | Adsorbent and preparation method and application thereof |
| CN111701566B (en) * | 2020-06-30 | 2022-07-12 | 广东工业大学 | Adsorbent and preparation method and application thereof |
| CN112108111A (en) * | 2020-08-13 | 2020-12-22 | 常熟理工学院 | Porous maple sphere-based biomass charcoal material and application thereof |
| WO2023071355A1 (en) * | 2021-10-26 | 2023-05-04 | 广东邦普循环科技有限公司 | Wastewater adsorbent, and preparation method therefor and use thereof |
| GB2622157A (en) * | 2021-10-26 | 2024-03-06 | Guangdong Brunp Recycling Technology Co Ltd | Wastewater adsorbent, and preparation method therefor and use thereof |
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Application publication date: 20200612 |