Using method of medicament used for chemically oxidizing and restoring pesticide contaminated soil

Abstract

The invention discloses a using method of a medicament used for chemically oxidizing and restoring pesticide contaminated soil. The medicament comprises a component A and a component B. The component A comprises sodium sulfate, and the component B comprises sodium dodecyl sulfate and calcium hydroxide. The method comprises the steps that 1, the adding ratio of the component A is calculated; 2, the using amount and matching ratio of the component B are calculated, and the component B is prepared; 3, soil is pretreated; 4, the component B is added into the contaminated soil, and the mixture is stirred and mixed to be uniform; 5, the component A is added into the soil into which the component B is added, and the mixture is stirred and mixed to be uniform; 6, the moisture content of the soil into which the component A and the component B are added is adjusted, and maintenance is carried out for 3-7 days; and 7, the soil pH is detected and analyzed in the maintenance period to ensure that the soil pH reaches 10.0 after the mixture is mixed to be uniform. By means of the using method of the medicament used for chemically oxidizing and restoring pesticide contaminated soil, pesticide matter difficult to degrade in soil can be rapidly and efficiently oxidized, decomposed and removed.

Description

technical field [0001] The invention relates to the usage of a pesticide-contaminated soil remediation agent, in particular to a method for using the pesticide-contaminated soil chemical oxidation repair agent. Background technique [0002] my country has always been a big country in the production and use of pesticides. The annual use of pesticides can reach 500,000 to 600,000 tons. There are more than 120 types of pesticides used, most of which are organic pesticides, including organochlorine pesticides, organophosphorus pesticides, and organic nitrogen pesticides. During field pesticide application, most of the pesticides directly enter the soil, and some of the pesticides volatilized into the atmosphere and sprayed on the crops can also enter the soil through rainwater leaching. [0003] Organochlorine pesticides are a class of persistent organic pollutants that widely exist in various environmental media such as air, water, soil, and sediment, and usually have the chara...

AI Technical Summary

Problems solved by technology

The general toxic effects of 666 are nerve and real organ poisons, and large doses can cause serious damage to the central nervous system and some real organs

However, organochlorine pesticides such as BCH are usually hydrophobic organic compounds, such as α-HCH, β-HCH, and γ-HCH, the solubility in water is only 0.2-10 mg / L, and most of the HCH in polluted soil Hexa will be distributed in the solid phase soil particles, but limited in the water phase of the soil

Therefore, in the actual chemical oxidation remediation process, due to the limited water solubility of target pollutants and the adsorption of organic pollutants by soil natural organic matter, it is often difficult for the added oxidizing agent to fully and effectively contact the target organic pollutants, so oxidation The reaction cannot be fully carried out, resulting in a large amount of oxidant dosage and limited repair effect

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