Method for treating, extracting and purifying organic chloride pesticide in sediment of coal mining subsidence area

Abstract

The invention relates to the field of sustained organic pollutant monitoring, in particular to a method for treating, extracting and purifying organic chloride pesticide in sediment of a coal mining subsidence area. The method specifically comprises the following steps of (1) treatment of sediment; (2) soxhlet extraction; (3) purifying and dilution; in the treatment process of sediment, freeze-drying, grinding and sieving a sediment sample; in the extraction process, extracting the organic chloride pesticide from the sediment sample by the soehlet extraction; in the purification process, purifying an extraction liquid by a self chromatographic column, wherein, because the extraction liquid contains part of moisture and multiple organic pollutants, the purification process is required to prevent the influence on the instrument detection; finally, concentrating the to-be-detected sample. The method for treating, extracting and purifying the organic chloride pesticide in the sediment of the coal mining subsidence area has the advantages that the process is simple and convenient, the method is simple, and the like; the interference by the impurities is excluded as much as possible, the reagent amount is saved, the optimum extraction and purification effect is realized, and the higher recovery rate is guaranteed.

Description

technical field [0001] The invention relates to the field of persistent organic pollutant monitoring, in particular to a method for treating, extracting and purifying organochlorine pesticides in bottom mud in coal mining subsidence areas. Background technique [0002] Over the years, due to the use of a large number of chemical fertilizers and pesticides and the discharge of agricultural pollutants, environmental problems such as agricultural pollution have increasingly attracted people's attention. Among them, organochlorine pesticides have gradually entered the public's field of vision. It is a synthetic product with hydrophobic and lipophilic properties. Different from conventional pollutants, as one of persistent organic pollutants, organochlorine pesticides have "three properties" effects such as carcinogenicity, teratogenicity, and mutagenicity, as well as genotoxicity. my country has stopped using organochlorine pesticides in the 1980s, but because they are easy to ...

AI Technical Summary

Problems solved by technology

Different from conventional pollutants, as one of persistent organic pollutants, organochlorine pesticides have "three properties" effects such as carcinogenicity, teratogenicity, and mutagenicity, as well as genotoxicity.

my country has stopped using organochlorine pesticides in the 1980s, but because they are easy to accumulate and difficult to degrade in the natural environment, some areas are still polluted by organochlorine pesticide residues

Water body sediment is considered to be one of the main carriers of organochlorine pesticides in the environment. In recent years, Chinese experts and related scholars have conducted relevant research on organochlorine pesticides in rivers, lakes, coastal bays and other sediments. The research mainly focuses on economically developed areas. There is no report on the sediment pollution in the special environment of the coal mining subsidence area, so there is also a lack of a method for the treatment, extraction and purification of organochlorine pesticides in the bottom mud of the coal mining subsidence area