Repair agent for treating heavy metal contaminated soil and application thereof

Abstract

The invention discloses a repair agent for treating heavy metal contaminated soil and an application thereof. Proper wastes of straw crushed matters, turf, modified lignin and roots, stems, leaves and shells of leguminous plants are selected according to the characteristics of the heavy metal contaminated soil, and a chemical adsorbent and a microbial inoculant are optimized and combined. Firstly, the wastes of straw crushed matters, turf, modified lignin and roots, stems, leaves and shells of leguminous plants are separated under the action of other chemical agents; by combining the auxiliary coordinating action of the chemical adsorbent and assisting available matters and excretions thereof generated by microorganisms in the growing process, a matrix and a raw material growing each other are formed; and a microbial community which is complex in composition, stable in structure and wide in function and contains various bacteria is formed through symbiotic and proliferative relationship. The microorganisms in a purifying process of the soil containing heavy metals benefit each other to exert the maximum combined advantages, so that the repair agent has an efficient treatment effect and is low in cost and obvious in economical benefit.

Description

technical field [0001] The invention relates to a soil pollution remediation aid, in particular to a remediation agent for treating heavy metal polluted soil and its application. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds, mainly caused by human factors such as mining, waste gas discharge, sewage irrigation and the use of heavy metal products. Heavy metals are not easy to move and dissolve, and cannot be excreted after entering the organism, which will cause chronic poisoning. Different from the pollution of other organic compounds, heavy metals are enriched, and heavy metal pollution is difficult to degrade naturally. For example, heavy metals such as lead and cadmium enter the soil environment, which will accumulate for a long time and destroy the self-purification ability of the soil, making the soil a "reservoir of pollutants." ". Planting crops on this kind of land, heavy metals can b...