A kind of heavy metal soil remediation agent and its application

Abstract

The invention provides a heavy metal soil remediation agent, which is composed of a heavy metal adsorption fixative and a soil conditioner, the mass fraction ratio of which is 10:1-10, and the heavy metal adsorption fixative is composed of basic iron oxide-graphene oxide gel powder 100 parts, composed of 1-100 parts of iron oxide-polypyrrole composite particles, the soil conditioner is one or more of pH regulator, loosening agent, mineral source conditioner, water-retaining agent, and the heavy metal soil restoration agent It can be directly applied in the polluted soil. The soil heavy metal remediation agent described in the present application is simple in operation, fast in remediation speed, remarkable in remediation effect on polluted soil, and high in remediation stability.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution, in particular to a heavy metal soil remediation agent and its application. Background technique [0002] Among the soil inorganic pollutants, heavy metals are the most prominent, mainly caused by human factors such as mining, waste gas discharge, sewage irrigation and the use of products with heavy metals exceeding the standard. Because heavy metals cannot be decomposed by soil microorganisms, they are easy to accumulate. Transformed into more toxic methyl compounds, some even accumulate in the human body through the food chain, and heavy metals enter the human body to regret causing human dysfunction and seriously endangering human health. Therefore, it is imminent to take effective measures to improve soil heavy metal pollution. [0003] At present, the methods for soil heavy metal remediation can be divided into three types: physical methods, chemical methods and b...

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Problems solved by technology

[0003] At present, the methods for soil heavy metal remediation can be divided into three types: physical methods, chemical methods and biological methods. The remediation method and the microbial remediation method, among them, the passivation method is achieved by adding a remediation agent to achieve passivation or fixation. This method has become a promising soil heavy metal pollution remediation technology due to its advantages of simple operation and short remediation period. However, the current Soil remediation agents still have some defects, such as heavy metal secondary pollution in the remediation agent itself, single type of components in the remediation agent, insufficient remediation efficiency, and repair stability problems, etc.