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Heavy metal trapping agent and process for layered mine pit acid wastewater treatment

A heavy metal scavenger and acid wastewater technology, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of removing heavy metals with low content and prevent secondary pollution , dense flocs and easy post-treatment

Pending Publication Date: 2021-04-30
湖南省园林建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a heavy metal scavenger and process for the treatment of layered mine deep pit acidic wastewater, to solve the problem of low content of heavy metal removal in the above background technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A heavy metal scavenger for the treatment of stratified mine deep pit acidic wastewater, comprising the following raw materials in weight percentage: polyethylene diamine tetraacetic acid 12%, organic sulfur scavenger: 13%, auxiliary agent: 10%, accelerator : 15%, pH adjuster: 10%, flocculant 5%, and the rest is deionized water.

[0025] It is worth noting that the organic sulfide in this example is toluene isothiocyanate, the auxiliary agent is sodium sulfide or sodium tripolyphosphate, and the accelerator is carbon disulfide. The pH regulator is sodium hydroxide, and the flocculant is polyaluminum ferric sulfate.

[0026] In this embodiment, the preparation process of the heavy metal scavenger for the treatment of stratified mine deep pit acidic wastewater specifically includes the following steps:

[0027] S1: Weigh various raw materials by weight percentage, add deionized water to the reaction kettle with agitator, and heat to 55-65°C;

[0028] S2: Add polyethylen...

Embodiment 2

[0033] A heavy metal scavenger for the treatment of stratified mine deep pit acidic wastewater, including the following raw materials in weight percentage: 15% polyethylene diamine tetraacetic acid, organic sulfur scavenger: 10%, auxiliary agent: 8%, accelerator : 12%, pH adjuster: 8%, flocculant 5%, and the rest is deionized water.

[0034] It is worth noting that the organic sulfide in this example is trisodium thiosulfate, the auxiliary agent is sodium sulfide or sodium tripolyphosphate, the accelerator is carbon disulfide, the pH regulator is sodium carbonate, and the flocculant is polymeric sulfuric acid Aluminum iron.

[0035] In this embodiment, the preparation process of the heavy metal scavenger for the treatment of stratified mine deep pit acidic wastewater specifically includes the following steps:

[0036] S1: Weigh various raw materials by weight percentage, add deionized water to the reaction kettle with agitator, and heat to 55-65°C;

[0037] S2: Add polyethyl...

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to a heavy metal trapping agent and process for layered mine pit acid wastewater treatment. The heavy metal trapping agent is prepared from the following raw materials in percentage by weight: 10-15% of polyethylene diamine tetraacetic acid, 10-15% of an organic sulfur capturing agent, 6-10% of an auxiliary agent, 10-15% of an accelerant, 5-10% of a pH regulator, 3-5% of a flocculating agent and the balance of deionized water. The heavy metals in the layered mine pit acid wastewater are efficiently treated, the content of the treated heavy metals is low, the treated heavy metals quickly react with heavy metal ions in the wastewater at normal temperature to generate water-insoluble salt, and a small amount of flocculant is added to form flocculent precipitate, so that the purpose of removing the heavy metals is achieved. The use proves that the treatment method is simple, and the environmental protection requirement can be met after one-time treatment under the condition of coexistence of multiple heavy metal ions.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a heavy metal scavenger and a process for treating layered mine deep pit acid wastewater. Background technique [0002] my country is a country with a shortage of water resources. A large amount of wastewater will be generated in human production and living activities. In order to protect the environment and avoid water pollution, for the purpose of recycling wastewater and saving limited water resources, most of the wastewater will be treated at present. Discharge or standard reuse. During the mining process of the mine, the waste water containing a large amount of heavy metal ions such as cadmium, chromium, copper, lead, mercury, nickel, silver, zinc, etc. will be discharged. This kind of waste water is treated by traditional physicochemical and biochemical methods to remove heavy metals. The rate is extremely low, and the wastewater cannot be treated up to the sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F101/22
CPCC02F1/5236C02F1/56C02F1/54C02F2101/20
Inventor 刘加力张卫王勇坚赵轶郭静周朝新
Owner 湖南省园林建设有限公司
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