Composite for treating heavy metal waste water

Abstract

The invention discloses a composite for treating heavy metal waste water. The composite for treating the heavy metal waste water is prepared from, by weight, 20-30 parts of common soil, 15-25 parts of limestone, 10-20 parts of zeolite powder, 20-40 parts of mesoporous molecular sieve, 40-60 parts of ethylenediamine tetraacetic acid metal sodium salt, 70-80 parts of sodium chloride and 30-50 parts of magnesium chloride. Through the combined action of a porous structure prepared from the common soil, the limestone, the zeolite powder and the mesoporous molecular sieve, a prepared adsorption material has high adsorption capacity and reducing capacity, multiple heavy metal ions, such as lead ions, cadmium ions and chromium ions, in water can be efficiently removed, the advantages of being high in removal rate and high in reaction speed are achieved, the adsorption material is loaded with zinc ions and magnesium ions, a synergistic effect is achieved, the capacity of reducing heavy metals is higher, and deep removal can be achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite material for heavy metal wastewater treatment. 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 shortcomings and deficiencies: (1) Some treatment ...

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

Images