Heavy metal chelating agent for waste incineration fly ashes and preparation method for heavy metal chelating agent

A heavy metal chelating agent and waste incineration fly ash technology, which is applied in the protection device against harmful chemicals, etc., can solve the problems of increased landfill volume, high leaching concentration, high energy consumption, etc., and achieve low cost of use and acid resistance Strong, low dosage effect
CN106955451AInactive Publication Date: 2017-07-18湖南云平环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖南云平环保科技有限公司
Publication Date
2017-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a heavy metal chelating agent for waste incineration fly ashes. The heavy metal chelating agent for the waste incineration fly ashes comprises a compound chelating agent and a sodium hydroxide solution mixed with a weight ratio being 1:2-3, wherein the compound chelating agent comprises, by weight percentage, 60-90% of an organic chelating agent, and 10-40% of an inorganic chelating agent, the organic chelating agent is dithiocarbamates and is one or more selected from zinc diethyl dithiocarbamate, zinc dimethyl dithiocarbamate, sodium dibutyl dithiocarbamate or sodium dibenzyl dithiocarbamate, and the inorganic chelating agent is one or two selected from sodium sulfide and sodium phosphate. The heavy metal chelating agent for the waste incineration fly ashes is capable of reducing the leaching concentration of heavy metals and ensuring that a fly ash solidification sample block can meet the limit value of the leaching concentration. The invention further provides a preparation method for the heavy metal chelating agent for the waste incineration fly ashes.
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Description

[0001] 【Technical field】

[0002] The invention relates to the technical field of metal chelating agents, in particular to a waste incineration fly ash heavy metal chelating agent and a preparation method thereof.

[0003] 【Background technique】

[0004] The fly ash of domestic waste incineration has complex components, and the main pollutants are heavy metals with high leaching toxicity, which have serious harm to the environment. Heavy metals are constantly migrating and transforming in the environment. The polluted soil and water environment cannot be eliminated through its own purification, and cannot be decomposed by microorganisms, and will be enriched through the biological chain. Therefore, improper handling of fly ash will lead to pollutants in it The loss of heavy metals into the environment will cause serious harm to human health and the natural environment. After testing, the fly ash of domestic waste incineration contains heavy metals with high leaching concentrat...

Claims

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