CN108905979A - A kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage - Google Patents

A kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage Download PDF

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Publication number
CN108905979A
CN108905979A CN201810706607.XA CN201810706607A CN108905979A CN 108905979 A CN108905979 A CN 108905979A CN 201810706607 A CN201810706607 A CN 201810706607A CN 108905979 A CN108905979 A CN 108905979A
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charcoal
pine needle
chestnut shell
preparation
heavy metal
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祁芳
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Anhui Yu Rui Environmental Protection Construction Co Ltd
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Anhui Yu Rui Environmental Protection Construction Co Ltd
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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
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • 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
    • 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
    • C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
    • 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
    • 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
    • B01J2220/485—Plants or land vegetals, e.g. cereals, wheat, corn, rice, sphagnum, peat moss
    • 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
    • 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

Abstract

The invention discloses a kind of preparation methods of the composite reactive charcoal of adsorbable heavy metal ions in sewage, the modified orange peel biological adsorption agent of saponification is uniformly mixed with gained pine needle base Carbon Materials, extruding rice husk, Chestnut shell active carbon material and green peel of walnut charcoal, obtains composite reactive charcoal.Using pine needle as carbon source, it is carbonized after alkali process, it is successfully prepared with flourishing cellular structure and nitrogen content pine needle base Carbon Materials abundant, by flourishing cellular structure and nitrogenous functional group abundant, prepared pine needle base Carbon Materials show good absorption property to metal ion, and pine needle base Carbon Materials have good repeat performance.Using chestnut shell as raw material, using ZnCl2Activation method prepares active carbon, and Chestnut shell active carbon is a kind of with more mushy unformed Carbon Materials；Using biological waste orange peel as raw material, through ethyl alcohol, naoh treatment, modified orange peel biological adsorption agent is obtained.

Description

A kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage
Technical field
The invention belongs to field of sewage treatment, and in particular to a kind of composite reactive of adsorbable heavy metal ions in sewage is raw The preparation method of object charcoal.
Background technique
The rapid development of modern industry produces a large amount of heavy metal-containing waste waters, and heavy metal is very harmful to ecological environment A class of pollutant, because its enter environment after cannot be biodegradable, often participate in food chain circulation and finally in organism Interior accumulation destroys organism normal physiological metabolic activity, is detrimental to health.How to eliminate the harm of heavy metal and effectively returns Receiving precious metal is the outstanding problem that current environmental protection work faces.With the intensification of economic globalization and the height of Chinese society Speed development, the pollution of heavy metal ion have become the trump card for threatening human life and health.With the high speed development of industry, ring Border pollution is also increasingly severe, and heavy metal ion is to cause the main source of environmental pollution.
Carbon Materials are a kind of excellent materials for adsorbing heavy metal ion, wherein nitrogenous Carbon Materials adsorption capacity is more efficient, It is the hot spot studied and applied instantly.Pine needle is from a wealth of sources, while itself nitrogen and pore canal system rich in.In order to more Good develops and utilizes agriculture and forestry organic waste material chestnut shell, promotes energy-saving and emission-reduction, has been directed to both at home and abroad to the research of chestnut shell Chestnut shell is used for sewage treatment, but chestnut shell is directly used in heavy metal ion adsorbed, adsorbance is relatively low, needs further It improves.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of compound work of adsorbable heavy metal ions in sewage is provided Property charcoal preparation method, according to this method prepare the adsorbable heavy metal ions in sewage of composite reactive charcoal, to more The absorption property of heavy metal species ion is excellent, removal rate is high.
The present invention is achieved by the following technical solutions：
A kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage, which is characterized in that including as follows Step：
（1）The preparation of pine needle base Carbon Materials：
The pine needle of pre-treatment is placed in corundum crucible, is put into retort, N is passed through2Charing process is carried out, with temperature control instrument control Heating rate processed is 2 DEG C/min, and heat preservation 1-2h is stopped at 495-505 DEG C, and heat preservation 1-2h is stopped at 595-605 DEG C, It after stopping heat preservation 1-2h at 695-705 DEG C, is cooled to room temperature in furnace, taking-up is ground into powder, and is washed with distilled water to Property, in 115-120 DEG C of dry 7-8h, obtain pine needle base Carbon Materials；
（2）The preparation of extruding rice husk：
It being crushed after 10-20 parts of rice husks are cleared up, 3-5% carbonate is added and helps swelling agent, control feeding temperature is 80-110 DEG C, Drop temperature is 250-300 DEG C, and adjustment moisture content of the raw material is 20-30%, pH 7-8, passes through electromagnetic induction heating extruding, screening Obtain extruding rice husk；
（3）The preparation of Chestnut shell active carbon：
To ZnCl2Solid-liquid ratio 1 is pressed in solution:6 are added pretreated chestnut shell, stir 5-10min, after impregnating 7-8h, are put into 1-2h is dried in 70-73 DEG C of baking oven, is placed in crucible, is put into electric tube furnace, in a nitrogen atmosphere, is carbonized in 600-605 DEG C Activation 2-3h obtains active carbon, takes out after cooling, grinds, boils 30-35min with hydrochloric acid, and being washed to pH with distillation is neutral, drying Obtain Chestnut shell active carbon material；
（4）The preparation of composite reactive charcoal：
10-20 parts of orange peels are cleaned with tap water and distilled water, drying to constant weight at 70-73 DEG C, it crushed 40 meshes, 1: 5-6 is added after dehydrated alcohol and sodium hydroxide solution impregnate 16-20h, is washed to neutrality, centrifugal filtration, after drying and grinding, crosses 40 Mesh obtains the modified orange peel biological adsorption agent of saponification；
By its with（1）Middle gained pine needle base Carbon Materials,（2）Middle gained extruding rice husk,（3）Middle gained chestnut shell absorbent charcoal material with And green peel of walnut charcoal is uniformly mixed, and obtains composite reactive charcoal.
Further, step（1）The pre-treatment of middle pine needle：10-20 parts of pine needles are washed with distilled water completely, in 98-102 Uniform particle is screened out after dry, pulverize in DEG C baking oven, according to mass ratio 1:2 and potassium hydroxide solid be uniformly mixed, be added Distilled water immersion 23-25h is dry.
Further, step（3）The pretreatment of middle chestnut shell：By the preferably fresh chestnut shell natural wind of 10-20 parts of conditions It is dry, the dust and impurity on surface is washed with water, is put into 90-93 DEG C of baking oven and dries moisture, 20 mesh are crushed in crusher It is spare；
ZnCl2The mass concentration of solution is 30%, concentration of hydrochloric acid 1mol/L.
Further, step（4）Middle green peel of walnut charcoal：10-20 parts of green peel of walnut are cleaned with ultrapure water to without miscellaneous Matter is placed in ventilation shady place natural air drying, crushed 20 meshes, be placed in Muffle furnace, under limited oxygen condition, in 495-505 DEG C It is pyrolyzed 5-6h, cooled to room temperature, taking-up sieves with 100 mesh sieve, and green peel of walnut charcoal is made；
The concentration of sodium hydroxide solution is 0.4mol/L.
The present invention has the following advantages that compared with prior art：
（1）It using pine needle as carbon source, carbonizes, is successfully prepared with flourishing cellular structure and abundant nitrogenous after alkali process Pine needle base Carbon Materials are measured, by flourishing cellular structure and nitrogenous functional group abundant, prepared pine needle base Carbon Materials are to gold Belong to ion and show good absorption property, especially to Zn2+、Pb2+、Cd2+、Cu2+The absorption property of four heavy metal species ions Excellent, pine needle base Carbon Materials have good repeat performance.
（2）Using the natural rice husk of agricultural wastes as raw material, puffing and modifying is carried out to it, prepares a kind of new adsorbent- Extruding rice husk adsorbing material, using extruding rice husk adsorbing material as absorption column packing, to Cu2+、Pb2+、Zn2+、Cr3+、 Cd2+And Ag+The absorption property of six heavy metal species ions is excellent；Carboxyl and hydroxyl and heavy metal ion on extruding rice husk occur Ion-exchange reactions leads to the absorption of heavy metal ion；The aobvious alkalinity of extruding rice husk itself, carries out alkali precipitation to heavy metal ion； A large amount of active group and macromolecular structure are conducive to be complexed or chelate heavy metal ion；Natural rice husk after the swelling exposure More active sites, increase the touch opportunity with heavy metal ion, are conducive to the absorption of heavy metal ion；Extruding rice husk Short texture, specific surface area increase, and are conducive to the absorption of heavy metal ion.
（3）Using chestnut shell as raw material, using ZnCl2Activation method prepares active carbon, Chestnut shell active carbon be it is a kind of have compared with Mushy unformed Carbon Materials, to heavy metal ion Cu2+And Cd2+Static Adsorptive capacity it is excellent；
Using biological waste orange peel as raw material, through ethyl alcohol, naoh treatment, modified orange peel biological adsorption agent, counterweight are obtained Metal ion Cu2+、Pb2+、Cd2+、Zn2+And Ni2+Absorption property it is excellent；
Green peel of walnut charcoal is made in agriculture and forestry organic waste material green peel of walnut using 500 DEG C of limit oxygen cracking process, green peel of walnut is through carbonizing Pb is adsorbed in functional group rich in afterwards2+、Cu2+Dominant mechanism be cation-π and ion exchange, to Pb2+、Cu2+ Absorption property it is excellent；
By pine needle base Carbon Materials and extruding rice husk, Chestnut shell active carbon, it is saponified modified orange peel biological adsorption agent and green peel of walnut Charcoal is uniformly mixed, and obtains composite reactive charcoal, excellent to the absorption property of contents of many kinds of heavy metal ion, removal rate is high.
Specific embodiment
Embodiment 1
A kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage, which is characterized in that including as follows Step：
（1）The preparation of pine needle base Carbon Materials：
The pine needle of pre-treatment is placed in corundum crucible, is put into retort, N is passed through2Charing process is carried out, with temperature control instrument control Heating rate processed is 2 DEG C/min, and heat preservation 1h is stopped at 495-505 DEG C, heat preservation 1h is stopped at 595-605 DEG C, in 695-705 DEG C when stop heat preservation 1h after, be cooled to room temperature in furnace, taking-up is ground into powder, and neutrality is washed with distilled water to, in 115- 120 DEG C of dry 7h, obtain pine needle base Carbon Materials；
（2）The preparation of extruding rice husk：
It is crushed after 10 parts of rice husks are cleared up, 3% carbonate is added and helps swelling agent, control feeding temperature is 80-110 DEG C, out material temperature Degree is 250-300 DEG C, and adjustment moisture content of the raw material is 20%, pH 7 by electromagnetic induction heating extruding sieves to obtain extruding rice husk；
（3）The preparation of Chestnut shell active carbon：
To ZnCl2Solid-liquid ratio 1 is pressed in solution:6 are added pretreated chestnut shell, stir 5min, after impregnating 7h, are put into 70-73 1h is dried in DEG C baking oven, is placed in crucible, is put into electric tube furnace, in a nitrogen atmosphere, obtained in 600-605 DEG C of carbonization-activation 2h Active carbon takes out after cooling, grinds, boils 30min with hydrochloric acid, and being washed to pH with distillation is neutrality, dries to obtain chestnut shell activity Carbon Materials；
（4）The preparation of composite reactive charcoal：
10 parts of orange peels are cleaned with tap water and distilled water, drying to constant weight at 70-73 DEG C, it crushed 40 meshes, 1:5 add Enter after dehydrated alcohol and sodium hydroxide solution impregnate 16h, be washed to neutrality, centrifugal filtration after drying and grinding, is crossed 40 meshes, obtained The orange peel biological adsorption agent modified to saponification；
By its with（1）Middle gained pine needle base Carbon Materials,（2）Middle gained extruding rice husk,（3）Middle gained chestnut shell absorbent charcoal material with And green peel of walnut charcoal is uniformly mixed, and obtains composite reactive charcoal.
Further, step（1）The pre-treatment of middle pine needle：10 parts of pine needles are washed with distilled water completely, at 98-102 DEG C Uniform particle is screened out after dry, pulverize in baking oven, according to mass ratio 1:2 and potassium hydroxide solid be uniformly mixed, be added steam Distilled water impregnates 23h, dry.
Further, step（3）The pretreatment of middle chestnut shell：By the preferably fresh chestnut shell natural air drying of 10 parts of conditions, The dust and impurity on surface is washed with water, is put into 90-93 DEG C of baking oven and dries moisture, it is standby that 20 mesh are crushed in crusher With；
ZnCl2The mass concentration of solution is 30%, concentration of hydrochloric acid 1mol/L.
Further, step（4）Middle green peel of walnut charcoal：10 parts of green peel of walnut are cleaned with ultrapure water to free from admixture, It is placed in ventilation shady place natural air drying, 20 meshes is crushed, is placed in Muffle furnace, under limited oxygen condition, is pyrolyzed in 495-505 DEG C 5h, cooled to room temperature, taking-up sieve with 100 mesh sieve, and green peel of walnut charcoal is made；
The concentration of sodium hydroxide solution is 0.4mol/L.
Embodiment 2
A kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage, which is characterized in that including as follows Step：
（1）The preparation of pine needle base Carbon Materials：
The pine needle of pre-treatment is placed in corundum crucible, is put into retort, N is passed through2Charing process is carried out, with temperature control instrument control Heating rate processed is 2 DEG C/min, and heat preservation 2h is stopped at 495-505 DEG C, heat preservation 2h is stopped at 595-605 DEG C, in 695-705 DEG C when stop heat preservation 2h after, be cooled to room temperature in furnace, taking-up is ground into powder, and neutrality is washed with distilled water to, in 115- 120 DEG C of dry 8h, obtain pine needle base Carbon Materials；
（2）The preparation of extruding rice husk：
It is crushed after 20 parts of rice husks are cleared up, 5% carbonate is added and helps swelling agent, control feeding temperature is 80-110 DEG C, out material temperature Degree is 250-300 DEG C, and adjustment moisture content of the raw material is 30%, pH 8 by electromagnetic induction heating extruding sieves to obtain extruding rice husk；
（3）The preparation of Chestnut shell active carbon：
To ZnCl2Solid-liquid ratio 1 is pressed in solution:6 are added pretreated chestnut shell, stir 10min, after impregnating 8h, are put into 70-73 2h is dried in DEG C baking oven, is placed in crucible, is put into electric tube furnace, in a nitrogen atmosphere, obtained in 600-605 DEG C of carbonization-activation 3h Active carbon takes out after cooling, grinds, boils 35min with hydrochloric acid, and being washed to pH with distillation is neutrality, dries to obtain chestnut shell activity Carbon Materials；
（4）The preparation of composite reactive charcoal：
20 parts of orange peels are cleaned with tap water and distilled water, drying to constant weight at 70-73 DEG C, it crushed 40 meshes, 1:6 add Enter after dehydrated alcohol and sodium hydroxide solution impregnate 20h, be washed to neutrality, centrifugal filtration after drying and grinding, is crossed 40 meshes, obtained The orange peel biological adsorption agent modified to saponification；
By its with（1）Middle gained pine needle base Carbon Materials,（2）Middle gained extruding rice husk,（3）Middle gained chestnut shell absorbent charcoal material with And green peel of walnut charcoal is uniformly mixed, and obtains composite reactive charcoal.
Further, step（1）The pre-treatment of middle pine needle：20 parts of pine needles are washed with distilled water completely, at 98-102 DEG C Uniform particle is screened out after dry, pulverize in baking oven, according to mass ratio 1:2 and potassium hydroxide solid be uniformly mixed, be added steam Distilled water impregnates 25h, dry.
Further, step（3）The pretreatment of middle chestnut shell：By the preferably fresh chestnut shell natural air drying of 20 parts of conditions, The dust and impurity on surface is washed with water, is put into 90-93 DEG C of baking oven and dries moisture, it is standby that 20 mesh are crushed in crusher With；
ZnCl2The mass concentration of solution is 30%, concentration of hydrochloric acid 1mol/L.
Further, step（4）Middle green peel of walnut charcoal：20 parts of green peel of walnut are cleaned with ultrapure water to free from admixture, It is placed in ventilation shady place natural air drying, 20 meshes is crushed, is placed in Muffle furnace, under limited oxygen condition, is pyrolyzed in 495-505 DEG C 6h, cooled to room temperature, taking-up sieve with 100 mesh sieve, and green peel of walnut charcoal is made；
The concentration of sodium hydroxide solution is 0.4mol/L.
According to composite reactive charcoal prepared by the method for the present invention, the heavy metal ion that can be used in absorption effluent, especially It is to Cr3+、Zn2+、Pb2+、Cd2+、Cu2+、Ni2+、Ag+The absorption property of heavy metal ion is excellent, and removal rate is high.

Claims (4)

1. a kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage, which is characterized in that including such as Lower step：
（1）The preparation of pine needle base Carbon Materials：
The pine needle of pre-treatment is placed in corundum crucible, is put into retort, N is passed through2Charing process is carried out, with temperature control instrument control Heating rate processed is 2 DEG C/min, and heat preservation 1-2h is stopped at 495-505 DEG C, and heat preservation 1-2h is stopped at 595-605 DEG C, It after stopping heat preservation 1-2h at 695-705 DEG C, is cooled to room temperature in furnace, taking-up is ground into powder, and is washed with distilled water to Property, in 115-120 DEG C of dry 7-8h, obtain pine needle base Carbon Materials；
（2）The preparation of extruding rice husk：
It being crushed after 10-20 parts of rice husks are cleared up, 3-5% carbonate is added and helps swelling agent, control feeding temperature is 80-110 DEG C, Drop temperature is 250-300 DEG C, and adjustment moisture content of the raw material is 20-30%, pH 7-8, passes through electromagnetic induction heating extruding, screening Obtain extruding rice husk；
（3）The preparation of Chestnut shell active carbon：
To ZnCl2Solid-liquid ratio 1 is pressed in solution:6 are added pretreated chestnut shell, stir 5-10min, after impregnating 7-8h, are put into 1-2h is dried in 70-73 DEG C of baking oven, is placed in crucible, is put into electric tube furnace, in a nitrogen atmosphere, is carbonized in 600-605 DEG C Activation 2-3h obtains active carbon, takes out after cooling, grinds, boils 30-35min with hydrochloric acid, and being washed to pH with distillation is neutral, drying Obtain Chestnut shell active carbon material；
（4）The preparation of composite reactive charcoal：
10-20 parts of orange peels are cleaned with tap water and distilled water, drying to constant weight at 70-73 DEG C, it crushed 40 meshes, 1: 5-6 is added after dehydrated alcohol and sodium hydroxide solution impregnate 16-20h, is washed to neutrality, centrifugal filtration, after drying and grinding, crosses 40 Mesh obtains the modified orange peel biological adsorption agent of saponification；
By its with（1）Middle gained pine needle base Carbon Materials,（2）Middle gained extruding rice husk,（3）Middle gained chestnut shell absorbent charcoal material with And green peel of walnut charcoal is uniformly mixed, and obtains composite reactive charcoal.
2. a kind of preparation side of the composite reactive charcoal of adsorbable heavy metal ions in sewage according to claim 1 Method, which is characterized in that step（1）The pre-treatment of middle pine needle：
10-20 parts of pine needles are washed with distilled water completely, uniform is screened out after dry, pulverize in 98-102 DEG C of baking oven Grain, according to mass ratio 1:2 and potassium hydroxide solid be uniformly mixed, distilled water immersion 23-25h is added, it is dry.
3. a kind of preparation side of the composite reactive charcoal of adsorbable heavy metal ions in sewage according to claim 1 Method, which is characterized in that step（3）The pretreatment of middle chestnut shell：
By the preferably fresh chestnut shell natural air drying of 10-20 parts of conditions, the dust and impurity on surface is washed with water, is put into 90-93 DEG C baking oven in dry moisture, it is spare that 20 mesh are crushed in crusher；
ZnCl2The mass concentration of solution is 30%, concentration of hydrochloric acid 1mol/L.
4. a kind of preparation side of the composite reactive charcoal of adsorbable heavy metal ions in sewage according to claim 1 Method, which is characterized in that step（4）Middle green peel of walnut charcoal：
10-20 parts of green peel of walnut are cleaned with ultrapure water to free from admixture, ventilation shady place natural air drying is placed in, crushed 20 mesh Sieve, is placed in Muffle furnace, under limited oxygen condition, in 495-505 DEG C of pyrolysis 5-6h, cooled to room temperature took out 100 mesh Green peel of walnut charcoal is made in sieve；
The concentration of sodium hydroxide solution is 0.4mol/L.
CN201810706607.XA 2018-07-02 2018-07-02 A kind of preparation method of the composite reactive charcoal of adsorbable heavy metal ions in sewage Withdrawn CN108905979A (en)

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CN109395696B (en) * 2018-12-22 2021-04-30 陕西师范大学 Easily-cleaned reusable sludge activated carbon adsorbent and preparation method thereof
CN109395696A (en) * 2018-12-22 2019-03-01 陕西师范大学 A kind of reusable sludge activity carbon adsorbent of easy-clear and preparation method thereof
CN110075800A (en) * 2019-05-07 2019-08-02 安徽工大化工科技有限公司 A kind of biomass adsorbent
CN110075798A (en) * 2019-05-07 2019-08-02 安徽工大化工科技有限公司 It is a kind of for handling the preparation method of the biomass adsorbent of metal ion waste water
CN111468078A (en) * 2020-04-16 2020-07-31 郑州航空工业管理学院 Reed stem biochar composite material and application thereof in remediation of cadmium-polluted soil
CN111468078B (en) * 2020-04-16 2023-04-25 郑州航空工业管理学院 Reed stalk biochar composite material and application thereof in repairing cadmium-polluted soil
CN111334382A (en) * 2020-04-17 2020-06-26 江西理工大学 Heavy metal cleaning soap based on spores and preparation method thereof
CN112547015A (en) * 2020-12-07 2021-03-26 西安工业大学 Preparation method and application of PEI modified biochar
CN114047240A (en) * 2021-11-10 2022-02-15 江西农业大学 Electrochemical sensor for detecting copper ions with high sensitivity and application thereof
CN114047240B (en) * 2021-11-10 2022-12-13 江西农业大学 Application of high-sensitivity electrochemical sensor in copper ion detection
CN114832776A (en) * 2022-05-10 2022-08-02 昆明理工大学 Acidized puffed active biochar adsorbing material as well as preparation method and application thereof
CN115501857A (en) * 2022-09-29 2022-12-23 中建八局发展建设有限公司 Biochar capable of removing high-nitrogen functional groups and preparation method thereof
CN117138749A (en) * 2023-07-11 2023-12-01 常州大学 Method for preparing nitrogen-rich biochar by using melamine impregnated paper waste and application of nitrogen-rich biochar in adsorbing Cr (VI) in water
CN117138749B (en) * 2023-07-11 2024-04-16 常州大学 Method for preparing nitrogen-rich biochar by using melamine impregnated paper waste and application of nitrogen-rich biochar in adsorbing Cr (VI) in water

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Application publication date: 20181130