Method for repairing organochlorine pesticide residues in soils

Abstract

The invention relates to a method for repairing organochlorine pesticide residues in soils. The method comprises the following steps of detecting pesticide residues in the soils, and recording data including longitudes, latitudes, depths and residual quantities of the soils, sampled for detection, with the organochlorine pesticide residues; transmitting recorded data to a processor; performing analysis, statistics and storage on the data by the processor; calculating usage amounts of a chemical adsorbent required for the residual quantities at different longitudes, latitudes and depths; and controlling a chemical reagent spraying device by a controller to spray the chemical adsorbent, wherein the longitudes, the latitudes and the depths of the sprayed soils are consistent to those of the detected soils. By adopting the method, rapid and efficient spraying of the chemical adsorbent is realized, and the problem of useless, too much or too less spraying of the chemical adsorbent is solved.

Description

technical field [0001] The invention relates to the field of pesticide residue detection, in particular to a method for repairing organochlorine pesticide residues in soil. Background technique [0002] Organochlorine pesticides are broad-spectrum insecticides used to control plant diseases and insect pests. Organochlorine pesticides are high-residue pesticides, which belong to nerve poisons and solid organ poisons, can cause cancer, have low volatility, and disappear slowly after use; high water solubility, high residue, easy migration, and a long residual period in the soil. Although my country has banned the production of organochlorine pesticides, the produced products are still used to a certain extent, and the residues used in the past few decades also continue to exist, which are potentially dangerous substances. [0003] The existing soil remediation of pesticide residues mainly includes microbial remediation, chemical remediation, and physical remediation. Chemical ...

AI Technical Summary

Problems solved by technology

However, the products of organochlorine pesticides acting on soil microorganisms also have residual toxicity like the parent body. For example, DDT is reduced to DDD, and DDE is generated after dehydrochlorination; the decomposed pesticides are still toxic, so the organochlorine pesticide residues are generally used. repair

[0004] However, in the prior art, the use of chemical adsorbents to remediate organochlorine pesticide residues in soil has the following problems: the usage amount of chemical adsorbents is calculated according to the detection results of pesticide residues, and the usage amount is the average value of pesticide residues within a certain range. Due to the characteristics of pesticide residues soluble in water and easy to migrate, pesticide residues will not be evenly distributed in the soil. Therefore, the traditional method of unified measurement of pesticide residues and uniform spraying of chemical adsorbents is simple, rough and poor in practicability. , often resulting in incomplete remediation of high-concentration pesticide residue soil, and secondary pollution caused by low-concentration pesticide residue soil