Analcime/chitosan composite material and preparation method thereof and application of composite material as heavy metal adsorption material

A composite material, analcite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of not realizing solid waste resource utilization, limited adsorption efficiency, long adsorption time, etc. Achieve high-efficiency adsorption and enrichment, easy operation, and large specific surface area.

Inactive Publication Date: 2020-09-29
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of this method is very low and will not cause secondary pollution. However, this method uses natural zeolite as a modified material, and does not realize the resource utilization of solid waste. When the removal rate of ammonia nitrogen reaches 90.8%, it needs to be adsorbed for 15 hours. Longer, limited adsorption efficiency

Method used

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  • Analcime/chitosan composite material and preparation method thereof and application of composite material as heavy metal adsorption material
  • Analcime/chitosan composite material and preparation method thereof and application of composite material as heavy metal adsorption material
  • Analcime/chitosan composite material and preparation method thereof and application of composite material as heavy metal adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0055] (1) Take 100.0g of raw material electrolytic manganese slag, wash it and dry it at 105°C, grind it into fine particles and pass it through a 200-mesh sieve, take the sieved components and continue drying;

[0056] (2) Take 40.0g of dried electrolytic manganese slag powder, add 60mL of deionized water and 11mL of hydrogen peroxide solution and stir at 90°C for continuous reaction for 2h, 80mL of distilled water and 30g of oxalic acid dihydrate are stirred at room temperature for 24h. Centrifuge until the supernatant has no obvious green color, dry the solid product, mix the impurity-removed manganese slag and sodium carbonate according to the molar ratio of sodium to silicon at 2:1, put it into a muffle furnace and control the temperature at 800°C for calcination for 2 hours, then take it out , ground into powder after cooling to room temperature;

[0057] (3) Take 10.0 g of pretreated electrolytic manganese slag and add 80.0 mL of 2.0 mol / L NaOH solution, and add NaOH a...

Embodiment 2

[0070] (1) Take 100.0g of raw material electrolytic manganese slag, wash it and dry it at 105°C, grind it into fine particles and pass it through a 200-mesh sieve, take the sieved components and continue drying;

[0071] (2) Take 40.0g of dried electrolytic manganese slag powder, add 60mL deionized water and 15mL hydrogen peroxide solution (90°C, 2h), 80mL distilled water and 35g dihydrate oxalic acid (24h), centrifuge until the supernatant has no obvious green color, and the solid The product is dried, and the manganese slag after impurity removal is mixed with sodium carbonate according to the sodium-silicon molar ratio of 2:1, sent to a muffle furnace at a controlled temperature of 850°C for calcination for 2.5 hours, then taken out, cooled to room temperature, and ground into powder;

[0072] (3) Take 10.0 g of pretreated electrolytic manganese slag and add 80.0 mL of 2.0 mol / L NaOH solution, and add NaOH with Si:Al=4:1 2 SiO 3 9H 2 O to obtain a mixed solution (pH = 10,...

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Abstract

The invention discloses an analcime/chitosan composite material and a preparation method thereof, and application of the analcime/chitosan composite material as a heavy metal adsorption material. Thepreparation method of the analcime/chitosan composite material comprises the following steps: firstly, preparing analcime by taking electrolytic manganese slag as a raw material; then, modifying the surface of analcime with chitosan so as to obtain the analcime/chitosan composite material which has uniform particles and is rich in micropores and mesopores. By adding the analcime/chitosan compositematerial into heavy metal wastewater, the purpose of quickly and efficiently adsorbing and enriching heavy metals can be achieved, the synthesis condition of the analcime/chitosan composite materialis simple, operation is convenient, and a new thought is provided for a resource utilization technology of solid wastes while the problem of electrolytic manganese residue pollution is solved.

Description

technical field [0001] The present invention relates to a heavy metal adsorption material, in particular to an analcite / chitosan composite material which has a good adsorption and enrichment effect on heavy metal ions, and also relates to the preparation of analcime / chitosan with high added value by using electrolytic manganese slag The method for the composite material and the application of the analzem / chitosan composite material in the treatment of heavy metal wastewater belong to the technical field of heavy metal adsorption material preparation. Background technique [0002] Electrolytic manganese slag refers to the acidic leaching slag produced by electrolytic production of manganese dioxide when sulfuric acid solution is added to manganese carbonate ore powder during the development of manganese ore. Today, the grade of manganese ore in my country is less than 15.3%, which is at a relatively low level. In 2017, China's manganese slag discharge amounted to more than 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/165B01J20/24B01J2220/4887C02F1/286C02F2101/20
Inventor 侯浩波李徐立曾越周旻冯露李诗瑶张雪梅宁希翼叶凡汪懿
Owner WUHAN UNIV
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