Heavy metal contaminated soil continuous root type combined remediation method

Abstract

The invention discloses a heavy metal contaminated soil continuous root type combined remediation method, belongs to the technical field of soil remediation, and can realize continuous connection of root systems of heavy metal hyperaccumulation plants through combination of continuous biological isolation tubes and continuous fiber dummy roots to meet remediation requirements of large-scale deep contaminated soil. The method comprises the following steps: absorbing moisture deep in soil by taking the continuous fiber dummy roots as root systems, forcing the moisture to carry heavy metal ions to transfer to the continuous fiber dummy roots, performing complementary remediation based on the combined action of microorganisms in the continuous fiber dummy roots and heavy metal hyperaccumulation plants, and isolating the growth of the microorganisms by utilizing the continuous fiber dummy roots. According to the method, the continuous fiber dummy root and the continuous biological isolationtube can adapt to the growth of the root system of the heavy metal hyperaccumulation plant, provide nutrients required by the growth of the microorganisms and the heavy metal hyperaccumulation plantin real time, and promote the effect of combined remediation.

Description

technical field [0001] The invention relates to the technical field of soil remediation, and more specifically, relates to a method for joint remediation of heavy metal-contaminated soil with continuous roots. Background technique [0002] Soil remediation is a technical measure to restore the normal function of polluted soil. In the soil remediation industry, there are more than one hundred existing soil remediation technologies, and there are more than ten commonly used technologies, which can be roughly divided into three methods: physical, chemical and biological. Since the 1980s, many countries in the world, especially developed countries, have formulated and carried out plans for the treatment and restoration of contaminated soil, thus forming a new soil restoration industry. [0003] Soil is one of the most basic material foundations for human beings to survive, and it is also the final destination of various pollutants. 90% of the world's pollutants are eventually t...

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Problems solved by technology

The use of biological methods to treat heavy metal pollution in soil has low cost and will not cause secondary pollution. It can also restore the soil ecosystem while treating heavy metals. However, the efficiency of heavy metal treatment is low and the effect is poor, and it cannot be efficiently treated. Complete the treatment of soil heavy metal pollution

[0005] At present, the joint remediation method of heavy metal hyperaccumulator plants and microorganisms has begun to rise, and its complementary coordination system can improve the remediation effect on soil, but only relying on heavy metal hyperaccumulator plants and microorganisms has a weak remediation and enrichment effect on heavy metals. The scope is extremely limited, and the remediation effect is poor in the face of a wide range of deeply polluted soil

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