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Method for preparing heavy metal ion absorbent

A technology of heavy metal ions and adsorbents, which is applied in the fields of chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of complex synthesis of adsorbents, unsatisfactory effects, and difficulty in popularization and use. , to achieve the effect of easy promotion and use, wide practicability and good use effect

Inactive Publication Date: 2012-10-24
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, rice husks are used to adsorb and remove copper ions and lead ions in wastewater, but the effect is not very satisfactory. The removal rate of mercury ions is only about 80%, and rice husks are easily decomposed by microorganisms in nature, and the adsorbed heavy metal ions are also will be released into the environment
In addition, there is also a method of using chitosan oligo / polysaccharide series derivatives to adsorb lead ions. Although the effect of this method is better, the synthesis of this kind of adsorbent is relatively complicated, the cost is high, and it is not easy to popularize and use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Pulverize Lingwu non-caking coal with a low degree of metamorphism to below 180 mesh, mix evenly according to the dry basis mass ratio of low metamorphic degree coal and urban sludge at a ratio of 3:7, and use a carbonization furnace at 900°C Heated and carbonized for 40 minutes to obtain a carbonized solid product. When the temperature of the carbonized solid product dropped to room temperature, it was crushed to a size below 100 mesh to obtain a heavy metal ion adsorbent product.

Embodiment 2

[0008] Example 2: Pulverize Lingwu non-caking coal with a low degree of metamorphism to below 180 mesh, mix evenly according to the ratio of dry basis mass ratio of low metamorphic degree coal to urban sludge of 2:8, and use a carbonization furnace at 800°C Heating and carbonizing in medium temperature for 30 minutes to obtain a carbonized solid product, and when the temperature of the carbonized solid product drops to room temperature, crush it to below 100 mesh to obtain a heavy metal ion adsorbent product.

Embodiment 3

[0009] Embodiment 3: Pulverize Huangxian lignite with low degree of metamorphism to below 180 mesh, mix evenly according to the ratio of dry basis mass ratio of coal with low metamorphism degree to urban sludge of 1:9, and heat in a carbonization furnace at 700°C Carbonize for 20 minutes to obtain a carbonized solid product. When the temperature of the carbonized solid product drops to room temperature, crush it to below 100 mesh to obtain a heavy metal ion adsorbent product.

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PUM

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Abstract

The invention discloses a method for preparing a heavy metal ion absorbent, which comprises: uniformly mixing sludge from urban sewage treatment plants and low-metamorphic coal; carbonizing the mixture at high temperature; and grinding to obtain an absorbent product. The absorbent is a cheap absorbent material having a good treatment effect on sewage containing heavy metal ions such as lead; and the process is simple, the cost is low, the use effect is desirable, and the promotion and use are easy.

Description

technical field [0001] The invention relates to a method for preparing an adsorbent, in particular to a method for preparing an adsorbent suitable for the treatment of sewage containing heavy metal ions. Background technique [0002] Heavy metal wastewater is a difficult problem in my country's industrial sewage treatment, which has caused serious environmental pollution. Farmland in many places is irrigated with water exceeding the standard of heavy metals, resulting in the production of food polluted by heavy metals and making it inedible. Adsorption is an effective method for treating wastewater containing heavy metal ions. At present, rice husks are used to adsorb and remove copper ions and lead ions in wastewater, but the effect is not very satisfactory. The removal rate of mercury ions is only about 80%, and rice husks are easily decomposed by microorganisms in nature, and the adsorbed heavy metal ions are also will be released into the environment. In addition, ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62
Inventor 张双全刘汉湖张双圣罗鹏
Owner CHINA UNIV OF MINING & TECH