Treatment agent for wastewater containing heavy metals

Abstract

The invention discloses a treatment agent for wastewater containing heavy metals. The treatment agent comprises raw materials in parts by weight as follows: 40-50 parts of sodium sulfate, 50-70 partsof polymeric silicate-aluminum sulfate, 45-60 parts of sodium sulfide, 8-16 parts of natural coal, 10-15 parts of acrylamide, 10-15 parts of activated carbon, 6-10 parts of cellulose, 10-20 parts of sodium chloride, 2-8 parts of strong base, 15-25 parts of a surfactant, 12-20 parts of an antirust agent and 50-60 parts of clear water. The treatment agent can be subjected to a chemical reaction withvarious heavy metal ions in wastewater under the conditions of normal temperature and large-range pH by adjusting pH value, and insoluble flocculent precipitates which are low in water content and easily removed by filtering are rapidly generated in a short time; compared with a common agent, the removing effect is improved by 9%-15%, decontamination time is remarkably shortened by 20%-40%, cadmium-containing sewage removal rate reaches 99.3%, chromium-containing sewage removal rate reaches 99.6%, lead-containing sewage removal rate reaches 99.5%, all the indexes exceed the national standard,and the decontamination effect is obvious.

Description

Technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a heavy metal sewage treatment agent. Background technique [0002] Heavy metal wastewater mainly comes from wastewater discharged from enterprises such as mining, smelting, electrolysis, electroplating, pesticides, medicine, paint, and pigments. The type, content and existing form of heavy metals in wastewater vary with different manufacturers. Since heavy metals cannot be decomposed and destroyed, they can only transfer their location and change their physical and chemical forms. Heavy metal pollution is different from the pollution of other organic compounds. Many organic compounds can reduce or eliminate their harmfulness through physical, chemical or biological purification of nature itself. The heavy metals are enriched and difficult to degrade in the environment. At present, many heavy metals such as lead, mercury, cadmium, cobalt, etc. enter the atmosphere, water,...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a heavy metal sewage treatment agent, which has the advantages of high decontamination efficiency, good effect and wide range of application conditions, and solves the problems of low decontamination efficiency, small application range and large limitations of existing agents