Method for repairing soil polluted by aniline compound by utilizing flax

Abstract

The invention relates to a method for repairing soil polluted by an aniline compound by utilizing flax, which comprises the following steps: (1) blending ferrous sulfate into original soil polluted by the aniline compound per kilogram to enable the pH of the original polluted soil to be neutral; (2) evenly mixing the soil polluted by the aniline compound with the mixture of sierozem and urban dewatered sludge in proportion to obtain mixed soil; (3) adding wheat bran to the mixed soil, and then, cultivating flax on the mixed soil in an open-air method; and (4) carrying out management on the flax in a conventional planting mode, and after the growth period of the flax comes to an end, carrying out mowing on the flax. The method for repairing the soil polluted by the aniline compound by utilizing the flax has low cost, small environment perturbation and no secondary pollution, is capable of increasing soil organic matter and soil fertility, is capable of enabling the polluted soil to be properly repaired after at least one growth period of the plant comes to the end, and is capable of achieving the goal of producing while repairing.

Description

technical field [0001] The invention relates to the phytoremediation technology of organic polluted soil, in particular to a method for using flax to repair soil polluted by aniline compounds. Background technique [0002] Aniline compounds are intermediates in the synthesis of azo dyes, herbicides, insecticides, drugs, explosives, etc., and are degradation products of herbicides and insecticides in agricultural production. Aniline pollutants in the environment mainly come from its production process. Since the production of aniline compounds is generally based on nitroaromatic compounds as raw materials, a large amount of aniline and nitroaromatic compounds will be produced during the production process. Material waste, such as the annual production of 15,000 tons of aniline will discharge 2 million tons of aniline wastewater, and the random discharge of wastewater containing aniline compounds is the main way for it to enter the soil. According to statistics, the annual pr...

AI Technical Summary

Problems solved by technology

[0004] At home and abroad, there are many studies on the remediation of aniline-contaminated water bodies, which mainly focus on the screening of highly efficient aniline-degrading bacteria and the research on degradation characteristics, but in the remediation of its polluted soil, the current research has just started

There are physical, chemical, biological and plant methods for the remediation of soil contaminated by aniline compounds. However, the physical and chemical methods are costly, and they are likely to cause secondary pollution during the remediation process, which will destroy the structure of the soil and are not suitable for the original purpose of polluting soil. bit fix

Images