Method capable of simultaneously immobilizing heavy metals in soil and degrading petroleum hydrocarbon

Abstract

The invention provides a method capable of simultaneously fixing heavy metals in soil and degrading petroleum hydrocarbon, which comprises the following steps: step 1, planting plants, selected from one or more of bidens pilosa, neyraudia reynaudiana, sesbania cannabina, xanthium sibiricum, ryegrass and broadleaf paspalum, on contaminated soil; 2, managing and irrigating the soil to ensure that the relative humidity (R) of the soil is not lower than 50; and step 3, enabling the plants to naturally grow for 6-12 months to complete soil remediation. The method disclosed by the invention has theadvantages of low cost, good restoration effect and capability of being applied to external soil, and effectively solves the problems of limited application range and high restoration price of a physical method and a chemical method in the prior art.

Description

technical field [0001] The invention relates to a traditional restoration method of soil pollution, in particular to a method capable of simultaneously fixing heavy metals in soil and degrading petroleum hydrocarbons. Background technique [0002] With the development of science and technology, the living environment of human beings is also suffering unprecedented pollution, especially the waste generated in the process of industrial production has caused serious heavy metal pollution and organic pollution to the land, affecting the growth of farmland crops and food safety. [0003] Existing remediation of heavy metal-contaminated land is mostly based on physical and chemical methods, of which physical methods include guest-soil method, electrodynamic repair method, vitrification method, etc.; chemical methods include activator leaching, ion exchange, solidification and stabilization Wait. The remediation of organic-contaminated land is also dominated by physical and chemic...

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Problems solved by technology

[0005] The present invention provides a method that can fix heavy metals in soil and degrade petroleum hydrocarbons at the same time, so as to at least solve the problems of limited application range of physical methods and chemical methods in the prior art and expensive restoration

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