Novel process and technology for strengthening electric remediation and bioremediation of polycyclic aromatic hydrocarbon contaminated soil by using surfactant

Abstract

The invention discloses a novel process and technology for strengthening electric remediation and bioremediation of polycyclic aromatic hydrocarbon contaminated soil by using a surfactant, and provides the novel process for strengthening the electric remediation and the bioremediation of the polycyclic aromatic hydrocarbon contaminated soil by using the surfactant, and parameters of the process, which effectively improves the efficiency of the slightly soluble organic pollutant in the bioremediation, and propels the researches on the electric remediation and in-situ bioremediation. According to the process provided by the invention, electrolytes of two electrodes are mixed and circulated, and the surfactant and microorganisms are added in the electrolytes for electric injection. A test for strengthening the electric remediation and the bioremediation by using the surfactant is carried out in conditions as follows: a voltage gradient is 1 V / cm; the electrolytes are bacterium suspension (containing nutrients) and the surfactant; a pH value is 7.3; and the flow velocity of the circulating electrolytes is 800 ml / h. Shown by a test result, the novel process for strengthening the electric remediation and the bioremediation by using the surfactant can effectively improve a degradation speed of the contaminated soil in China and Philippines, improves a degradation speed of pyrene and benzopyrene, and solves the problem that the acid-base variation of a pH value of the soil is easy to occur in the traditional electric remediation and bioremediation.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to the technical field of bioremediation of soil polluted by organic matter by adopting electrodynamic restoration technology. Background technique [0002] Soil is the basis for human survival and development, and it is also an important part of the human ecological environment. Soil pollution can be roughly divided into: heavy metal pollution, pesticide and organic pollution, radioactive pollution, pathogenic bacteria pollution and other types. Among them, soil organic chemicals, as the main pollutants affecting the soil environment, have become the focus of international attention. Toxic and harmful organic compounds accumulate in the environment, and may bring harm to the entire ecosystem in a certain period of time or under certain conditions. disastrous consequences. [0003] Microbial remediation technology, as a remediation technology for organ...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low solubility, strong adsorption capacity and difficult degradation of certain organic pollutants in the soil during the in-situ electrokinetic bioremediation process

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