A kind of restoration method of cyanide-contaminated soil

Abstract

The invention discloses a method for repairing cyanide-contaminated soil. According to the characteristics that cyanide-contaminated soil contains various pollutants such as cyanide and heavy metals, especially cyanide also includes difficult-to-handle metal cyanide complexes Ferricyanide complexes, such as ferricyanide complexes, etc., first use ferrous sulfate and zinc sulfate to fix ferricyanide complexes and various heavy metals in the soil, and then use ozone to treat residual refractory cyanide, thiocyanate and other pollutants in the soil . Cyanide and various heavy metals in the treated soil meet the national soil environmental quality assessment requirements.

Description

technical field

[0001] The invention relates to a method for treating pollutants in the field of environmental protection, in particular to a method for repairing cyanide-contaminated soil. Background technique

[0002] Because cyanide has good surface activity, activation performance and complexing ability, it has been widely used in gold, electroplating, organic chemical industry and other industries in recent years, so the problem of soil cyanide pollution is becoming more and more serious. The natural degradation rate of cyanide in soil is much slower than its degradation rate in natural water bodies, and under certain conditions, it can be highly enriched in soil, which has long-term potential danger to plant growth, surface water, and groundwater. At present, the remediation technology of cyanide-contaminated soil at home and abroad is mainly based on plant method and microbial method, but due to the conditions and long cycle of plant growth, as well as the limitation ...