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Preparation method of biomass adsorbent for treating wastewater containing metal ions

A biomass adsorbent and metal ion technology, which is applied in water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex process, large investment and high processing cost, and achieves low cost and easy availability of materials. Inexpensive, the effect of increasing adsorption capacity

Inactive Publication Date: 2019-08-02
安徽工大化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of preparation method of the biomass adsorbent that is used to process the wastewater containing metal ions, for the problems of complex process, large investment and high processing cost in the treatment of wastewater containing zinc, cobalt and nickel at present, the present invention operates Low cost, simple operation, stable operation, can remove a large amount of metal ions, advanced treatment of metal ion wastewater, can realize the advanced treatment and standard discharge of metal ion-containing wastewater in the chemical industry at low cost

Method used

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  • Preparation method of biomass adsorbent for treating wastewater containing metal ions
  • Preparation method of biomass adsorbent for treating wastewater containing metal ions
  • Preparation method of biomass adsorbent for treating wastewater containing metal ions

Examples

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Embodiment 1

[0037] A preparation method for a biomass adsorbent for treating wastewater containing metal ions, comprising the following steps:

[0038] (1) Wash the fresh walnut green peel with distilled water, then pulverize the washed walnut green peel with a pulverizer, and dry the crushed walnut green peel mud at 90°C for 2 hours, which is convenient for long-term storage and use;

[0039] (2) Mix the dry walnut green peel mud and ammonium oxalate according to the mass ratio of 7:3, fully pulverize and mix again, so that the ammonium oxalate and walnut peel are evenly mixed;

[0040](3) Under a nitrogen atmosphere, add the above-mentioned mixture of walnut green skin mud and ammonium oxalate into a pyrolysis reactor for pyrolysis and carbonization, and heat up to 530°C at a heating rate of 10°C / min, every time the temperature rises by 50°C and keeps for 10 minutes. , and keep warm for 6 hours to prepare the required biomass adsorbent for treating wastewater containing metal ions.

[...

Embodiment 2

[0049] A preparation method for a biomass adsorbent for treating wastewater containing metal ions, comprising the following steps:

[0050] (1) Wash the fresh walnut green peel with distilled water, then pulverize the washed walnut green peel with a pulverizer, and dry the crushed walnut green peel mud at 90°C for 2 hours, which is convenient for long-term storage and use;

[0051] (2) Mix the dry walnut green peel mud and ammonium oxalate according to the mass ratio of 7:3, fully pulverize and mix again, so that the ammonium oxalate and walnut peel are evenly mixed;

[0052] (3) Under a nitrogen atmosphere, add the above-mentioned walnut green skin mud and ammonium oxalate mixture into the pyrolysis reactor, and raise the temperature to 500° C. at a heating rate of 10° C. / min, and keep it warm for 10 minutes every 50° C., and keep it warm for 6 hours. , to prepare the required biomass adsorbent for treating wastewater containing metal ions.

Embodiment 3

[0054] A preparation method for a biomass adsorbent for treating wastewater containing metal ions, comprising the following steps:

[0055] (1) Wash the fresh walnut green peel with distilled water, then pulverize the washed walnut green peel with a pulverizer, and dry the crushed walnut green peel mud at 90°C for 2 hours, which is convenient for long-term storage and use;

[0056] (2) Mix the dry walnut green peel mud and ammonium oxalate according to the mass ratio of 7:3, fully pulverize and mix again, so that the ammonium oxalate and walnut peel are evenly mixed;

[0057] (3) Under a nitrogen atmosphere, add the above-mentioned walnut green skin mud and ammonium oxalate mixture into the pyrolysis reactor, and raise the temperature to 550°C at a heating rate of 10°C / min, and keep warm for 10 minutes every 50°C, and keep the temperature for 6h , to prepare the required biomass adsorbent for treating wastewater containing metal ions.

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Abstract

The invention discloses a preparation method of a biomass adsorbent for treating wastewater containing metal ions, and belongs to the technical field of wastewater treatment. The method comprises thefollowing steps: cleaning walnut green husks with distilled water for several times to remove impurities on the surfaces of the walnut green husks, crushing the walnut green husks with a crusher, anddrying to constant weight for later use; mixing the walnut husks with ammonium oxalate in proportion, crushing again, and uniformly stirring; and finally, pyrolyzing and carbonizing under the nitrogenprotection condition. The obtained adsorbent has many gaps and a great many of oxygen-containing functional groups and nitrogen-containing functional groups, and has strong chemical adsorption capacity on the metal ions. The preparation method has the advantages of low running cost, simplicity in operation and stable running, a purpose of efficiently removing the metal ions is achieved, and advanced treatment and standard emission of the wastewater containing the metal ions in the chemical industry can be realized at low cost.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a preparation method of a biomass adsorbent for treating wastewater containing metal ions. Background technique [0002] In industrial production and life, a lot of wastewater containing metal ions will be produced. Most of the metal ions are harmful to the human body or the ecological environment, and heavy metal ions cannot be decomposed and will accumulate in the body of organisms. . So how to remove metal ions in the water environment is a topic worth studying. At present, there are many methods for the removal of metal ions, such as chemical precipitation, ion exchange, adsorption, membrane separation, and electrochemical methods. [0003] Chemical precipitation is generally suitable for treating wastewater containing high concentrations of heavy metal ions and is ineffective when metal concentrations are low. Moreover, the chemical precipitation method is un...

Claims

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Application Information

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IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/20
CPCB01J20/20C02F1/283B01J2220/485C02F2101/20
Inventor 余谟鑫张晨王晓婷万超许立信张贺新李英杰
Owner 安徽工大化工科技有限公司
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