Soil remediation process

Abstract

The invention discloses a soil remediation process, which is characterized by including the steps of: 1) turning-over of soil, i.e. circularly turning over the soil at the bottom layer to the surfacesoil; 2) planting of hyperaccumulators, i.e. planting hyperaccumulators in the soil subjected to circulating soil turning; 3) application of fertilizer, i.e. applying a phytoremediation agent to the soil where the hyperaccumulators are planted; and 4) irrigation watering, i.e. carrying out water-saving irrigation on the soil where the hyperaccumulators are planted and the hyperaccumulators. The soil remediation process provided by the invention turns over the bottom soil to the upper soil, and plants the hyperaccumulators in the soil and applies fertilizer, not only can remediate the heavy metal polluted soil in a large range, but also is environment-friendly and convenient for operation, and lowers the remediation cost.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a soil remediation process. Background technique [0002] With the rapid development of industrialization, urbanization and rural intensification, mining and smelting, urban sewage discharge, heavy use of heavy metal-containing pesticides and herbicides, and excessive return of livestock manure to fields have all resulted in heavy metals in the soil system. The accumulation of heavy metals is increasing continuously. At the same time, the mobility of heavy metals in the soil is small, it is not easy to be leached, and it is difficult to be degraded by microorganisms. As a result, the content of heavy metals in some soils exceeds the reasonable capacity of the soil, resulting in reduced or even no harvest of farmland crops, and through the food chain. Transmission and enrichment will cause serious potential harm to the human body. According to statistics, from 2009 to Fe...

AI Technical Summary

Problems solved by technology

In the methods of treating heavy metal pollution in soil, methods such as guest soil method, lime application or chemical leaching method are commonly used. Although these methods have certain effects in the improvement or restoration of polluted soil, they often have some problems in practice. some limitations

If the process is complicated, time-consuming and labor-intensive, the cost is high, and the soil structure and fertility are easily damaged, it is not suitable for the soil with low concentration and large-scale heavy metal pollution to be treated by the above method