A method for leaching valuable heavy metals in river and lake water

Abstract

The invention discloses a method for leaching valuable heavy metals in water bodies of rivers and lakes, which includes selecting interception areas, alkalization treatment, layered pumping to sedimentation tanks, adding metal sulfides to the sedimentation tanks, discharging the upper layer, and re-entering the lower layer In the interception area, adding flocculant, extracting concentrated waste water, high temperature incineration, leaching extraction and electrolytic recovery and other main processes, a method for leaching valuable heavy metals in river and lake water disclosed by the present invention gradually purifies the water in the interception area, It effectively saves chemicals, and at the same time, this method treats the bottom mud, and the treatment of heavy metal pollution is more thorough.

Description

technical field [0001] The invention relates to the technical field of heavy metal pollution control in water, in particular to a method for leaching valuable heavy metals in water bodies of rivers and lakes. Background technique [0002] The water bodies in the production projects of many small enterprises are privately discharged into the nature without meeting the standards. Especially, the wastewater produced by some smelting enterprises and electrolysis enterprises contains a large amount of heavy metals. Most of the heavy metals and other pollutants are adsorbed and deposited by the sediment. In the silt of rivers and lakes, when the external conditions change, the heavy metals in the sediment will be re-released, causing water pollution. At present, when most companies are dealing with heavy metal pollution in rivers and lakes, they do not treat the symptoms but do not treat the root causes. SUMMARY OF THE INVENTION [0003] The present invention aims to solve the ...

AI Technical Summary

Problems solved by technology

[0002] The water bodies in the production projects of many small enterprises are discharged into the nature privately without reaching the standard. In particular, the wastewater produced by some smelting enterprises and electrolysis enterprises contains a large amount of heavy metals. Most of the heavy metals and other pollutants are adsorbed by sediment and deposited In river and lake silt, when the external conditions change, the heavy metals in the sediment will be released again, causing water pollution

At present, when most enterprises control heavy metal pollution in rivers and lakes, they treat the symptoms rather than the root cause, and do not control the sediment, and have not formed an effective treatment.

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