Oxidation removing method for polycyclic aromatic hydrocarbon in soil through Fenton reagent bag

Abstract

The invention discloses a method for oxidizing and removing polycyclic aromatic hydrocarbons in soil by using a Fenton reagent bag, and belongs to the technical field of soil restoration. The method is to mix the air-dried soil to be tested with distilled water to make mud, add acid reagents to the mud to adjust the pH value of the mud to 3-5 to obtain acid mud, add Fenton reagent packs to the acid mud and stir evenly to obtain Slurry reaction liquid, then the mud reaction liquid is left to react, and the polycyclic aromatic hydrocarbons in the soil can be removed after the reaction; wherein the Fenton reagent package is made of FeSO 4 、H 2 o 2 and K 2 C 2 o 4 composition. This method can effectively remove naphthalene, acenaphthene, acenaphthylene, anthracene, fluorene and phenanthrene in soil, and the treatment time is shortened and the removal rate is improved compared with the traditional Fenton reagent.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for oxidizing and removing polycyclic aromatic hydrocarbons in soil by using a Fenton reagent pack. Background technique [0002] With the rapid development of industry and agriculture in our country, a large amount of waste gas, waste water, waste residue, etc. have been improperly discharged, directly or indirectly causing soil pollution. Polycyclic aromatic hydrocarbons (PAHs) are a common type of high-risk organic pollutants in soil. On April 17, 2014, the "National Soil Pollution Survey Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources of my country pointed out that "my country's soil The exceeding standard rate of PAHs points reached 1.4%. How to efficiently remediate PAHs-contaminated soil to reduce the risk of soil pollution is a major research topic urgently needed to be resolved in the environmental fie...

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Problems solved by technology

Physical and chemical methods include heat treatment, photodegradation, soil leaching and electrodynamic restoration, gas phase extraction, chemical leaching, application of regulators, soil dumping, chemical solidification, etc. (Wu Jian et al., 2005) , but these technologies generally have high operational requirements or very expensive economic costs, and sometimes cause serious damage to the soil structure, so there are still big problems to be solved for large-scale use

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