Compound adsorbing material for heavy metal wastewater treatment and preparation method thereof

Abstract

The invention discloses a compound adsorbing material for heavy metal wastewater treatment and a preparation method thereof. The compound adsorbing material for the heavy metal wastewater treatment is formed by the following raw materials by weight: 20-30 parts of kaolin, 15-25 parts of shell powder, 10-20 parts of zeolite powder, 20-40 parts of mesoporous molecular sieve, 40-60 parts of edetic acid metallic sodium salt, 70-80 parts of copper chloride, and 30-50 parts of magnesium chloride. The compound adsorbing material for the heavy metal wastewater treatment is prepared through the combined action of the kaolin, the shell powder, the zeolite powder and the porous structure prepared by the mesoporous molecular sieve. The prepared adsorbing material has strong adsorption capacity and reducing capacity, and has the advantages of high removal rate and rapid reaction rate. Multiple heavy metal ions, such as lead ion, cadmium ion and chromium ion, are efficiently removed from the water body, and the zinc ions and the magnesium ions are loaded on the adsorbing material for synergistic effect. The capacity for reducing the heavy metal is stronger, and the deep removal can be realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite adsorption material for heavy metal wastewater treatment and a preparation method thereof. Background technique [0002] Heavy metals cannot be degraded by microorganisms, can be enriched in organisms and cause significant toxic effects, and are persistent pollutants. For example, mercury, cadmium, chromium, lead, arsenic, etc. seriously endanger human health, damage aquatic ecosystems, reduce agricultural and fishery production, etc., causing huge economic losses and becoming a major problem restricting my country's economic and social development and improving people's livelihood. Aiming at heavy metal pollution, people have developed a variety of water treatment methods, such as chemical precipitation, ferrite, adsorption, ion exchange, electrolysis, reverse osmosis, electrodialysis, enhanced ultrafiltration, biological methods, etc. There are some shortc...

AI Technical Summary

Problems solved by technology

Aiming at heavy metal pollution, people have developed a variety of water treatment methods, such as chemical precipitation, ferrite, adsorption, ion exchange, electrolysis, reverse osmosis, electrodialysis, enhanced ultrafiltration, biological methods, etc. There are some shortcomings and deficiencies: (1) Some treatment costs are high, such as enhanced ultrafiltration, electrodialysis, chelation precipitation in chemical precipitation, ion exchange, etc.; (2) Some processes are complex and cumbersome to operate, Such as ferrite method, enhanced ultrafiltration method; (3) Some treatment effects cannot meet the requirements, such as traditional chemical precipitation method; (4) Some have poor adaptability, such as biological method, electrolysis method, ferrite method; (5) Some equipment requires large investment, such as reverse osmosis and electrodialysis

However, these adsorbents generally have problems such as low adsorption capacity, large dosage, and insufficient removal efficiency for heavy metals.

If it is not treated by effective desorption, it will often produce a large amount of waste residue

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