Method and treatment system for restoring organic pollution soil through combination of room temperature desorption and chemical oxidation

Abstract

The present invention discloses a method and a treatment system for restoring organic pollution soil through combination of room temperature desorption and chemical oxidation. The method comprises: placing organic matter polluted soil in a room temperature desorption workshop; adopting a moveable soil turner to turn the polluted soil, wherein one turning is performed every 2 h, a portable photoionization detector is adopted to rapidly detect the concentration of volatile or semi-volatile organic matters at a position above 15-25 cm of the polluted soil during a turning process, and turning is stopped until the detection data is stabilized; and adding a 6% potassium permanganate solution to a liquid tank, opening a water pump and a manual control valve, spraying the potassium permanganate solution to the polluted soil, concurrently adopting the soil turner to uniformly turn the potassium permanganate solution and the polluted soil, and stopping spraying and turning until the potassium permanganate content in the soil achieves the preset addition amount. The present invention further provides a treatment system for the method. With the method, organic pollutant soil restoring efficiency is high, the cost is low, and the method is a combination restoring method with strong practicability in the project.

Description

technical field [0001] The invention relates to a normal-temperature desorption and chemical oxidation combined repair method and treatment system for organic polluted soil, which belongs to the technical field of environmental restoration and is especially suitable for volatile / semi-volatile organic compounds produced in chemical, petroleum, coking, printing and dyeing industries. Remediation of solid media such as contaminated soil. Background technique [0002] Soil organic pollutants refer to organic compounds that enter the soil environment and cause pollution. The industries involved in the discharge of organic pollutants mainly include petrochemical, coking, paint and coating manufacturing, pesticide production, rubber product manufacturing, leather shoe manufacturing, wood-based panels and wooden furniture. Manufacturing, automobile and parts spraying, electronic product manufacturing, steelmaking, cement production, etc., and most of the soil organic pollutants are ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is aimed at the deficiencies and defects of the single soil remediation method of normal temperature desorption and ectopic chemical oxidation when dealing with high-concentration volatile and / or semi-volatile organic compound polluted soil (long remediation time, smearing effect, etc.) , high cost, low single-batch processing volume, etc.), provide a repair method that uses normal temperature desorption combined with chemical oxidation to treat high-concentration volatile and / or semi-volatile organic compound contaminated soil. Volatile and / or semi-volatile organic compounds, use a portable photoionization detector (PID) to quickly detect the concentration of organic pollutants at 15-25cm above the polluted soil, and add potassium permanganate solution when the test data tends to be stable, to reduce pollution Oxidation and decomposition of organic pollutants in the soil can effectively avoid the "tailing phenomenon" of normal temperature desorption and significantly shorten the repair time

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