Soil remediation agent for lead and benzopyrene combined pollution and application thereof

Abstract

The invention provides a soil remediation agent for lead and benzopyrene combined pollution and an application thereof. The soil remediation agent is applied through the following steps: mixing diatomite, carboxymethyl cellulose, zeolite powder, composite shell powder, quick lime, humic acid and derivatives thereof, a compound inoculum, livestock and poultry manure, waste tea residue, urea, calcium superphosphate, polymeric aluminum ferric sulphate, ferrous chloride, calcium oxide, urea phosphate, potassium sulfate and diammonium phosphate so as to constitute a mixture, placing the mixture into contaminated soil, and carrying out standing and curing so as to complete remediation. The method provided by the invention can quickly and effectively degrade lead and benzopyrene combined pollution to soil, shortens the remediation period of the contaminated soil, has low remediation cost, does not cause secondary pollution, is simple and practicable, can improve the fertility of the soil in acontaminated site, and is applicable to remediation of lead and benzopyrene contaminated sites in various scales. The soil remediation agent provided by the invention has the following advantages: pollution of the soil remediation agent to the environment is reduced; meanwhile, the cost of the soil remediation agent is decreased; and by combining precipitation action and biological action, the soil remediation agent has good treatment effect on lead and benzopyrene combined pollution to the soil.

Description

technical field [0001] The invention relates to a soil remediation agent for compound pollution of lead and benzopyrene and its application. Background technique [0002] Pollutants in the environment are tending to be diversified and complex, and mainly exist in the form of compound or mixed organic and inorganic pollutants, which pose a threat to the environment and human health. Therefore, compound pollution is closer to the status quo of environmental pollution. Heavy metals lead (Pb) and benzopyrene (Benzo[a]pyrene, B[a]P) are two typical types of pollutants in the environment. Irrigation, long-term use of chemical fertilizers, pesticides, and industrial waste gas deposition have led to serious Pb and B[a]P pollution problems in my country's soil. B[a]P is a kind of organic pollutant ubiquitous in the environment. At the same time, because B[a]P is stable and difficult to degrade, it shows an increasing trend in the environment. Pb and B[a]P each have serious pollution...

AI Technical Summary

Problems solved by technology

However, microbial remediation technology has shortcomings such as short shelf life of degrading bacteria and difficulty in surviving in the soil. The remediation effect is often unstable, making it difficult to apply and promote on a large scale.

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