Heavy metal sludge treatment agent and preparation method thereof

Abstract

The invention discloses a heavy metal sludge treatment agent and a preparation method thereof. The heavy metal sludge treatment agent comprises the following main raw materials in parts by weight: 5-12 parts of glycine, 25-35 parts of sodium bentonite, 5-10 parts of polyacrylamide, 10-20 parts of activated carbon, 5-8 parts of poly-dimethyl-diallyl-ammonium chloride, 2-8 parts of dimethyl malonate, 2-6 parts of 2-aminopyridine-4-methanol, 5-12 parts of distillers' grains, 5-10 parts of sawdust, 2-4 parts of pesticide-degrading bacteria, 10-20 parts of montmorillonite and 0.2-0.4 part of sodium sulfide. According to the heavy metal sludge treatment agent disclosed by the invention, the physicochemical indexes of soil which is severely contaminated by heavy metals can reach the GB15618-2008 standard; and moreover, the treatment process is simple, the dosage is small, the treatment effect is good, the performance is stable, the restoration degree of the contaminated soil is high, the cost of the treatment agent can be effectively reduced, and the treatment agent has excellent economic benefits and wide social benefits.

Description

technical field [0001] The invention relates to the technical field of sludge, in particular to a heavy metal sludge treatment agent and a preparation method thereof. Background technique [0002] With the acceleration of urbanization and the improvement of living standards, the public is paying more and more attention to environmental issues, and the requirements for environmental quality are also increasing. In order to prevent water pollution and improve the ecological environment, my country's urban sewage treatment rate has increased rapidly. In 2000, my country's urban domestic sewage discharge reached 22.1 billion tons. At present, there are more than 400 urban sewage treatment plants that have been built and operated in the country, with a daily treatment capacity of 25.34 million tons. In urban sewage treatment, urban sludge, which accounts for 0.02% of the volume of sewage, is generally produced. With the continuous construction of sewage treatment plants, the g...

AI Technical Summary

Problems solved by technology

Therefore, its heavy metal problem has always been a concern about the environmental risk of urban sludge agricultural use, and has become an obstacle limiting its large-scale land use.