Harmless processing technology for waste dangerous chemical containing mercury

A technology for the harmless treatment of hazardous chemicals, applied in the direction of protection devices against harmful chemicals, etc., can solve the problem of lack of harmless disposal of mercury-containing hazardous chemicals, the lack of disposal qualifications and actual disposal capabilities, destruction units, safety Hidden dangers and other problems, to achieve the effect of eliminating hidden dangers of social security, strong practicability, and avoiding safety risks
CN102247685AActive Publication Date: 2011-11-23浙江归零环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
浙江归零环保科技有限公司
Publication Date
2011-11-23

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Abstract

The invention provides a harmless processing technology for waste dangerous chemical containing mercury. The technology comprises the following steps: 1) adding waste containing mercury into water and adjusting a pH to less than 2; then adding hydrogen peroxide to converse all organic mercury in a reaction system to Hg<2+>; 2) adjusting a ph of the reaction system to 11-12 and heating to remove excess hydrogen peroxide; 3) adding compound sulfide to converse all Hg<2+> in the reaction system to HgS deposition, and adding ferrous salt to precipitate excess S<2->; 4) adding solidification materials into the depositions and a waste liquid from step 3) and carrying out solidification treatment to obtain a cement solidified body. The technology provided by the invention combines a chemical treatment and a cement solidification technology organically; and a mercury leaching toxicity of the obtained cement solidified body is less than 0.1mg / L to meet relevant national harmlessness standard.
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Description

technical field

[0001] The invention belongs to the technical field of waste treatment technology, and in particular relates to a harmless treatment process for waste hazardous chemicals containing mercury. Background technique

[0002] Solidification technology is an important means to deal with heavy metal waste and other non-metal hazardous waste. Hazardous wastes are immobilized in an inert, impermeable matrix by solidification. After solidification, toxic and harmful pollutants can be transformed into substances with relatively stable physical and chemical characteristics with low solubility, low migration and low toxicity.

[0003] The mechanism of solidification technology to stabilize waste components is the combined action of the chemical bonding force between waste and coagulant, the physical inclusion of coagulant on waste, and the adsorption of hydration products of coagulant to waste, so that waste can be transformed into immobile solid or compact solid, Change...

Claims

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