Comprehensive remediation method for soil polluted by heavy metals and application of comprehensive remediation method

Abstract

The invention discloses a comprehensive remediation method for soil polluted by heavy metals and application of the comprehensive remediation method. The comprehensive remediation method comprises the following steps of arranging an enclosing wall around the soil polluted by the heavy metals, supplying water to the soil through a water pipeline, and cultivating aquatic plants with better metal absorbency; taking out the aquatic plants, draining excessive water, enabling the soil to ventilate, and naturally drying in the air; planting plants with better absorbency to the heavy metals, pruning stems and leaves of plants at fixed period when the stems and leaves of the plants over grow, accelerating vegetative growth of the plants, and completely digging out root systems of the plants after a growing period; introducing earthworms, and watering during the period; digging out a plurality of grass pits in the soil, wherein the space between every two adjacent grass pits is 2 to 3m; cultivating maggots by adopting a straw insect rearing method, and using the maggots to purify residual heavy metals in the soil, wherein the maggots become adults and then fly away; and adopting phytoremediation, earthworm bioaccumulation and maggot bioaccumulation at the same time. According to the comprehensive remediation method, which is a soil remediation method, disclosed by the invention, the total amount of the heavy metals in the soil can be effectively reduced, and no pollution and damage to a site proposed to be remediated are caused; and the method is environmentally friendly.

Description

technical field [0001] The invention relates to a comprehensive restoration method and application of heavy metal polluted soil. Background technique [0002] At present, in order to increase food production, many farmlands are heavily using inorganic chemical fertilizers and pesticides. While increasing production, the adverse effects of chemical fertilizers and pesticides on the quality of agricultural products, soil compaction, groundwater and ecological environment are ignored, resulting in a sharp increase in the organic matter in the soil. decline and accumulation of heavy metals, destroying the original soil ecological balance, soil compaction, water and soil pollution, environmental deterioration, ecological imbalance, increasing agricultural production costs and declining quality of agricultural products have become increasingly prominent, resulting in increased production without increasing income and environmental pollution (rivers and lakes) The vicious cycle of ...

AI Technical Summary

Problems solved by technology

For these three approaches, the specific methods can generally be divided into the following types of measures: engineering restoration measures, chemical restoration measures, agricultural measures and biological restoration measures, etc., but the above three restoration measures require a large investment and the effect is evenly distributed.