CN115445573A - Iron-aluminum modification method for kitchen waste biochar - Google Patents
Iron-aluminum modification method for kitchen waste biochar Download PDFInfo
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- CN115445573A CN115445573A CN202211170326.XA CN202211170326A CN115445573A CN 115445573 A CN115445573 A CN 115445573A CN 202211170326 A CN202211170326 A CN 202211170326A CN 115445573 A CN115445573 A CN 115445573A
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- biochar
- kitchen waste
- treatment
- iron
- pyrolysis
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 37
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 title description 9
- 238000002715 modification method Methods 0.000 title description 2
- -1 iron ions Chemical class 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000197 pyrolysis Methods 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 239000010842 industrial wastewater Substances 0.000 claims description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000008235 industrial water Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000013068 control sample Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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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
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- 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
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- 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
- C02F2101/36—Organic compounds containing halogen
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
- C02F2101/40—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Treatment By Sorption (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a kitchen cabinetThe method for preparing biochar from wastes comprises adding iron ions Fe into liquid kitchen wastes 3+ And aluminum ion Al 3+ Treating, after the treatment is finished, concentrating to ensure that the water content of the treated kitchen waste is not higher than 10%, and then performing pyrolysis treatment on the concentrated solution under the protection of nitrogen; cooling and crushing the pyrolysis product to prepare the biochar. The invention also provides application of the prepared biochar in wastewater treatment. The biochar prepared from the kitchen waste provided by the invention can obviously improve the sewage treatment capability of the kitchen waste.
Description
Technical Field
The invention belongs to the technical field of kitchen waste treatment, and particularly relates to a method for preparing biochar from kitchen waste, wherein the prepared biochar is suitable for treating industrial water.
Technical Field
1.5 million tons of kitchen waste is estimated to be generated in China every year, the economic value generated by the traditional kitchen waste resource utilization modes such as feed, fertilizer and energy utilization is less than the treatment cost of the kitchen waste, and the purpose of high-value utilization of resources cannot be realized; resulting in huge environmental pollution and resource waste.
Research has proved that the biochar prepared from the kitchen waste has certain pore structure and certain adsorption capacity, but has low adsorption efficiency on anionic pollutants and organic matters because of negative charge in water. This limits the application of biochar prepared based on kitchen waste in sewage treatment. Therefore, a method for improving the sewage treatment capacity of the kitchen waste based biochar is urgently needed.
Disclosure of Invention
The invention aims to provide a method for preparing biochar from kitchen waste, and the prepared biochar is suitable for treating industrial water, so that the defects of the prior art are overcome.
The invention firstly provides a biochar prepared from kitchen waste, which is prepared by adding iron ions Fe into liquid kitchen waste 3+ And aluminum ion Al 3+ After the treatment is finished, the water content of the kitchen waste is enabled to be not higher than 10% through vacuum drying treatment, and then the dried kitchen waste is subjected to pyrolysis treatment under the condition of nitrogen protection; cooling and crushing the pyrolysis product to prepare the biochar;
the iron ion Fe 3+ And aluminum ion Al 3+ The addition concentration of (A) is 0.1-1.0M, 0.25-0.75M; preferably 0.5-0.6M, 0.4-0.5M;
the addition of iron ions and aluminum ions is realized by adding ferric chloride and aluminum chloride;
the pyrolysis is carried out at 270-600 ℃ for 1-1.5 hours, wherein the temperature is preferably 300-330 ℃;
the invention also provides the application of the prepared biochar in wastewater treatment;
in another aspect, the invention also provides a method for treating industrial wastewater, which uses the biochar to carry out adsorption treatment.
The biochar prepared from the kitchen waste provided by the invention can obviously improve the sewage treatment capability of the kitchen waste.
Drawings
FIG. 1: photo picture of the prepared biochar.
Detailed description of the preferred embodiments
The invention provides an effective way for preparing biochar from kitchen waste, thereby effectively improving the resource value of the biochar. The produced biochar can be widely used for treating wastewater and waste gas and preparing substances such as chemical reagents, super capacitors, food additives and the like.
The kitchen waste provided by the invention is used for preparing the biochar, the initial water content of the kitchen waste exceeds 70%, and the kitchen waste is basically in a liquid or slurry state; then adding iron ions and aluminum ions into the kitchen waste, uniformly mixing, performing vacuum drying treatment to ensure that the water content of the kitchen waste is not higher than 10%, and performing pyrolysis treatment under the protection of nitrogen; cooling and crushing the pyrolysis product to prepare the biochar; wherein the concentration of the added iron ion and aluminum ion is 0.1-1.0M and 0.25-0.75M respectively
In one embodiment of the present invention, the iron ion and the aluminum ion are preferably added at concentrations of 0.5 to 0.6M, 0.4 to 0.5M;
the pyrolysis treatment is carried out at a temperature of from 270 ℃ to 600 ℃, preferably from 300 ℃ to 330 ℃.
The biochar provided by the invention can be used for treating industrial wastewater.
The present invention will be described in detail below with reference to examples and the accompanying drawings.
Example 1: production method of iron-aluminum modified kitchen-based biochar
The kitchen waste is taken from a canteen of Ministry of science and technology, and has water content of about 75%, and is crushed, and an aqueous solution containing ferric chloride and aluminum chloride is added into the crushed kitchen waste, wherein the ferric ion Fe 3+ And aluminum ion Al 3+ The concentration is 0.5-0.6M and 0.4-0.5M respectively, and the mixture is stirred evenly; and then the liquid or pasty substance is dried in vacuum to obtain a fine granular kitchen waste treatment product, wherein the water content of the treatment product is 5-8%.
The dried treated product was placed in a pyrolysis furnace and nitrogen was charged to exclude oxygen. The pyrolysis furnace is heated at a rate of 10 ℃/min, the pyrolysis temperature is maintained at 300-330 ℃, and the pyrolysis reaction is carried out at the temperature for 1-1.5 hours. And after the reaction is finished, naturally cooling to room temperature. And (3) taking the pyrolysis product biochar, and crushing to 60 meshes to obtain the iron-aluminum modified kitchen-based biochar (figure 1).
And preparing a control sample, namely preparing the common kitchen-based biochar serving as the control sample by the same steps except that the ferric chloride and the aluminum chloride are not added.
Example 2: evaluation of capability of iron-aluminum modified kitchen-based biochar in treating industrial wastewater
The iodine adsorption value, methylene blue adsorption value and chromium (Cr) adsorption value of the iron-aluminum modified kitchen-based biochar and the common kitchen-based biochar are tested by adopting the test method listed in LY/T3279-2021 activated carbon technical index and test method for industrial water treatment 6 + ) Four indexes of removal force and Chemical Oxygen Demand (COD) removal rate are measured,and whether the prepared biochar meets the technical requirements of the activated carbon for industrial water treatment is evaluated according to the technical requirements of the standard. The iron-aluminum modified kitchen waste biochar and the unmodified kitchen waste biochar are independently prepared for three times, the indexes are respectively measured, the three times of arithmetic mean values are taken, and the experimental results are shown in table 1.
Table 1: influence table of iron-aluminum modification on capability of preparing biochar from kitchen wastes to treat industrial wastewater
The results in table 1 show that the iron-aluminum modified biochar prepared by the invention can improve the capability of the biochar prepared from kitchen wastes in treating industrial wastewater, and the prepared modified biochar meets the requirements of high-grade products.
Claims (9)
1. The biochar is characterized in that iron ions Fe are added into liquid kitchen waste 3+ And aluminum ion Al 3+ Carrying out treatment; after the treatment is finished, concentrating to ensure that the water content of the treated kitchen waste is not higher than 10%, and then carrying out pyrolysis treatment on the concentrated solution under the protection of nitrogen; cooling the pyrolysis product and crushing to prepare the biochar.
2. Biochar according to claim 1, characterized in that said iron ion Fe 3+ And aluminum ion Al 3+ The addition concentrations of (A) and (B) are respectively 0.1-1.0M and 0.25-0.75M.
3. Biochar as claimed in claim 1, wherein said iron ion is Fe 3+ And aluminum ion Al 3+ The addition concentrations of (A) and (B) are respectively 0.5-0.6M and 0.4-0.5M.
4. Biochar according to claim 1, characterized in that said iron ion Fe 3+ And aluminum ion Al 3+ Is provided by ferric chloride and aluminum chloride.
5. The biochar as claimed in claim 1, wherein the concentration enables the water content of the treated kitchen waste to be 5% -8%.
6. Biochar as claimed in claim 1, wherein said pyrolysis is carried out at 270 ℃ to 600 ℃ for 1 to 1.5 hours.
7. The biochar of claim 1, wherein the temperature of pyrolysis is 300-330 ℃.
8. Use of biochar according to claim 1 for treating wastewater.
9. A method for treating industrial wastewater, characterized in that the method comprises using the biochar of claim 1 for adsorption treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211170326.XA CN115445573A (en) | 2022-09-22 | 2022-09-22 | Iron-aluminum modification method for kitchen waste biochar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211170326.XA CN115445573A (en) | 2022-09-22 | 2022-09-22 | Iron-aluminum modification method for kitchen waste biochar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115445573A true CN115445573A (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211170326.XA Pending CN115445573A (en) | 2022-09-22 | 2022-09-22 | Iron-aluminum modification method for kitchen waste biochar |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084126A (en) * | 2014-07-09 | 2014-10-08 | 福建工程学院 | Preparation method of biomass-based ferroaluminium complex spherical carbon |
| CN104888705A (en) * | 2015-05-21 | 2015-09-09 | 桂林理工大学 | Preparation method of magnetic ferric oxide/bagasse active carbon |
| CN106753466A (en) * | 2016-12-21 | 2017-05-31 | 福建师范大学 | A kind of preparation method of the sludge base charcoal for mixing kitchen garbage |
| CN111266086A (en) * | 2020-01-22 | 2020-06-12 | 青岛农业大学 | Method for preparing magnetic biochar from kitchen waste |
| CN114405471A (en) * | 2022-01-27 | 2022-04-29 | 东南大学 | Aluminum-iron bimetal modified biochar phosphorus removal material and preparation method thereof |
| CN114540036A (en) * | 2021-12-02 | 2022-05-27 | 上海市环境工程设计科学研究院有限公司 | Organic biochar for repairing soil-underground water aniline pollution and repairing method |
-
2022
- 2022-09-22 CN CN202211170326.XA patent/CN115445573A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084126A (en) * | 2014-07-09 | 2014-10-08 | 福建工程学院 | Preparation method of biomass-based ferroaluminium complex spherical carbon |
| CN104888705A (en) * | 2015-05-21 | 2015-09-09 | 桂林理工大学 | Preparation method of magnetic ferric oxide/bagasse active carbon |
| CN106753466A (en) * | 2016-12-21 | 2017-05-31 | 福建师范大学 | A kind of preparation method of the sludge base charcoal for mixing kitchen garbage |
| CN111266086A (en) * | 2020-01-22 | 2020-06-12 | 青岛农业大学 | Method for preparing magnetic biochar from kitchen waste |
| CN114540036A (en) * | 2021-12-02 | 2022-05-27 | 上海市环境工程设计科学研究院有限公司 | Organic biochar for repairing soil-underground water aniline pollution and repairing method |
| CN114405471A (en) * | 2022-01-27 | 2022-04-29 | 东南大学 | Aluminum-iron bimetal modified biochar phosphorus removal material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| SAYED Q. HASHIMI等: "Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology", WATER, no. 14, 31 August 2022 (2022-08-31), pages 1 - 18 * |
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