Phytoremediation method for soil polluted by phthalic acid ester

Abstract

The invention belongs to the field of polluted soil recovery techniques and discloses a phytoremediation method for the soil polluted by phthalic acid ester. The method comprises the following steps: (1) crushing and flattening the soil, ditching, furrowing, applying a base fertilizer, and irrigating the soil by water until the soil is wet; (2) adding nutrient soil or a culture medium into each cave before seeding, carrying out water spraying, seeding corn seeds, and covering the seeding corn seeds with nutrient soil; (3) carrying out soil transplanting when 3-4 main leaves grow from a seedling, and keeping the soil moist; (4) harvesting corn plants before a heading stage of corns. According to the phytoremediation method, the degradation of the phthalic acid ester is promoted by virtue of the cooperation of a corn root system and rhizosphere microorganisms, so that the removal rate in the soil reaches 86%, and the efficient removal of the phthalic acid ester in the soil is realized; after the corns are harvested, stems and leaves can be taken as feeds and have economic benefits; the growth of the corns is rapid, the root system is developed, the biomass is large, and the phthalic acid ester in the soil can be effectively removed; the phytoremediation method is applicable to the recovery of the wide-range middle-concentration and low-concentration polluted soil polluted by the phthalic acid ester.

Description

technical field [0001] The invention belongs to the technical field of remediation of polluted soil, in particular to a phytoremediation method of phthalate-contaminated soil. Background technique [0002] Phthalates (PAEs, also known as phthalates, commonly known as plasticizers) are an important class of organic compounds, which are widely used as plastic plasticizers, pesticide carriers, insect repellents, clothing, cosmetics, lubricants Raw materials for the production of agents, etc. Among them, plastic plasticizers are used in the largest amount, accounting for about 80% of its total output. PAEs are also a class of environmental endocrine disruptors, some of which have reproductive and developmental toxicity, liver toxicity, potential carcinogenicity and bioaccumulation effects. Among them, 6 PAEs compounds are listed as "excellent" by China Environmental Monitoring Center, the US Environmental Protection Agency and the European Union. pollution control". [0003] ...

AI Technical Summary

Problems solved by technology

At present, a lot of research has been done on the phytoremediation of heavy metal and polycyclic aromatic hydrocarbon contaminated soil at home and abroad, but there are few reports on the method of using phytoremediation of PAEs contaminated soil.

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