Material for treating wastewater containing heavy metal

Abstract

The invention discloses material for treating wastewater containing heavy metal. The material comprises, by weight, 10-20 parts of hydrochloric acid-modified sepiolite, 15-25 parts of pyridine quaternary ammonium salt type cationic polyacrylamide, 5-8 parts of zeolite powder, 3-10 parts of modified attapulgite, 10-15 parts of cellulose xanthate, 2-8 parts of chitosan, 10-25 parts of crosslinking carboxymethyl starch, 5-10 parts of hydroxy propyl cellulose grafted copolymer, 2-8 parts of ferric sulfate, 1-5 parts of lime powder and 3-8 parts of activated carbon powder, wherein hydroxy propyl cellulose grafted copolymer is formed by hydroxy propyl cellulose grafted with 4-vinyl pyridine. The material for treating the wastewater containing the heavy metal has the advantages that the material is used for separating and removing the heavy metal ions in an aqueous solution, is high in selectivity on the heavy metal ions, is capable of efficiently removing pollution, and is easy in raw material regeneration; energy consumption during the sewage treatment is avoided, the material is simple to produce, and the treated water can reach the discharge standards.

Description

technical field [0001] The invention relates to the technical field of sewage treatment materials, in particular to a treatment material for heavy metal sewage. Background technique [0002] A large amount of wastewater containing heavy metals is discharged from industrial production processes such as mining, chemical industry, electronics, instrumentation, and machinery manufacturing. Wastewater containing heavy metals (such as cadmium, nickel, mercury, zinc, etc.) is the most serious pollution to the natural environment and harmful to humans. One of the most harmful industrial wastewater. Heavy metals are generally difficult to disappear in nature and cannot be decomposed and destroyed. They can only change their physical and chemical forms and transfer their location. They can be enriched through the food chain. In addition to directly acting on the human body to cause diseases, heavy metals may also promote the development of chronic diseases. Therefore, the treatment o...

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Problems solved by technology

[0003] Currently, the treatment methods for heavy metal sewage include precipitation, electrolysis, reverse osmosis, evaporation and ion exchange. The precipitation, adsorption and removal efficiency of heavy metals in sewage is low, and the cost is relatively high, which leads to the negative attitude of producers to the treatment of heavy metal sewage, which is one of the reasons why heavy metal sewage discharge has been repeatedly prohibited.