Conditioner for soil contaminated by heavy metals

Abstract

The invention provides a conditioner for soil contaminated by heavy metals, the conditioner for soil contaminated by heavy metals is prepared by chelation of humic acid, 1,3,5-triazine-2,4,6-trisulfide, nitrogen fertilizer, phosphate fertilizer and potash fertilizer, and comprises humate, 1,3,5-triazine-2,4,6-trisulfide, nitrogen, phosphorus pentoxide, potassium oxide and the like. The conditioner for soil contaminated by heavy metals provided by the invention can not only control the heavy metal pollution of the soil, but also can improve the soil properties, can fertilize the soil and improve the fertilizer capacity of the soil, can further ensure the safety of the ecological environment, and is a heavy-metal contaminated soil conditioner which integrates pollution control, soil regulation, fertilizer supply and safety.

Description

technical field [0001] The invention relates to the technical field of treatment and restoration of heavy metal polluted soil, in particular to a conditioner for heavy metal polluted soil. Background technique [0002] Among heavy metals, cadmium, lead, mercury, chromium and metalloid arsenic are the most toxic and harmful to human health, and are often called "five poisonous elements". Soil heavy metal pollution is caused by the long-term application of chemical fertilizers, which accelerates soil acidification, which leads to the continuous transformation of insoluble heavy metals hidden in the soil parent material into soluble heavy metals. The input and accumulation of soil heavy metal pollution. Heavy gold produces various forms of pollutants through complex chemical reactions and remains in the soil for a long time, which is extremely difficult to remove through physical, chemical and biological methods. Heavy metal pollution in soil, on the one hand, intensifies the...

AI Technical Summary

Problems solved by technology

The third is the soil chemical conditioning technology including the application of organic fertilizers and quicklime, soaking in water, and the use of adsorbents, passivators, and antagonists. , in order to reduce the bioavailability of heavy metals in the soil, reduce the absorption of heavy metals by crops, and promote the content of heavy metals in agricultural products to meet the national quality and safety standards. Problems such as low efficiency of gleization and "adsorption-passivation-antagonism" of heavy metals, deviation of stability and secondary pollution

However, both of these two patents have strong selectivity to passivation of heavy metals in the soil, weak continuous stability, and lack of soil fertilization and fertilizer supply functions, which have certain limitations.

Images