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Efficient hexavalent chromium removal agent and preparation method thereof

A technology of hexavalent chromium and remover, which is applied in the field of water treatment, can solve problems such as difficult hexavalent chromium treatment, complicated operation, and lack of pertinence, and achieve the effects of improving water quality safety, good ecological safety, and avoiding the impact of impurities

Inactive Publication Date: 2018-07-20
JILIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three researches have just started. Although they often have the characteristics of high removal efficiency, their high cost and slow speed limit their widespread use.
[0008] Existing remediation technologies often have one or several shortcomings such as high cost, complicated operation, difficulty in preservation, slow treatment effect, lack of pertinence, and secondary pollution, making it difficult to effectively treat hexavalent chromium in water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A high-efficiency hexavalent chromium remover, the raw materials are composed of the following proportions by weight: 20 parts of sponge iron with a particle diameter of 1-3 mm, 3 parts of copper sulfate of 0.1-0.5 mm, and 4 parts of oxalic acid of 0.1-0.5 mm.

[0043] At 20°C, the action time is 10min, and the removal rate of 10mg / L hexavalent chromium solution is 56.3%.

Embodiment 2

[0045] A high-efficiency hexavalent chromium remover, the raw materials are composed of the following proportions by weight: 20 parts of sponge iron with a particle diameter of 1-3 mm, 3 parts of copper sulfate of 0.1-0.5 mm, and 1 part of oxalic acid of 0.1-0.5 mm.

[0046] At 20°C, the action time is 10min, and the removal rate of 10mg / L hexavalent chromium solution is 61.6%.

Embodiment 3

[0048] A high-efficiency hexavalent chromium remover, the raw materials are composed of the following proportions by weight: 20 parts of sponge iron with a particle diameter of 1-3 mm, 3 parts of copper sulfate of 0.1-0.5 mm, and 2 parts of oxalic acid of 0.1-0.5 mm.

[0049] At 20°C, the action time is 10min, and the removal rate of 10mg / L hexavalent chromium solution is 50.8%.

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Abstract

The invention relates to the field of water treatment, in particular to an efficient hexavalent chromium removal agent. The efficient hexavalent chromium removal agent is prepared from the following raw material composition ingredients in proportion by weight: 20 parts of sponge iron with the particle diameter being 1 to 3mm, 3 to 12 parts of copper sulfate with the particle diameter being 0.1 to0.5mm and 1 to 4 parts of oxalic acid with the particle diameter being 0.3 to 0.8mm. In addition, the invention also provides a preparation method of the efficient hexavalent chromium removal agent. The removal agent has the advantages that the price is low; the acquisition is easy; the preparation method is simple; the ecological safety is high; the service life is long, and the like. An important effect can be achieved in the restoration process of hexavalent chromium polluted factory waste water, river, lake and underground water.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a high-efficiency hexavalent chromium remover and a preparation method thereof. Background technique [0002] Chromium is an important strategic resource. Chromium salt series products are used as the basic raw materials of chemical industry-light industry-advanced alloy materials, and are widely used, involving 15% of the national economy. On the one hand, the development and utilization of a large amount of chromium has improved the living standards of the people, and on the other hand, it has also caused a large amount of chromium slag and waste gas containing chromium. Since 1958, China has accumulated and landfilled more than 6 million tons of highly toxic chromium slag, and an annual increase of 600,000 tons. The treatment of chromium slag is considered to be a long-standing problem in the chromium salt industry, and it is also a worldwide environmental protection problem. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/62C02F101/22
CPCC02F1/00C02F1/62C02F2101/22
Inventor 董维红朱贵麟姜伟男宋俊德鲁景峰李永强王岩
Owner JILIN UNIV
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