摘要
农药的使用会影响土壤中的有机质分解、养分循环等关键生态过程,且很多农药在土壤中具有长期的残留性,会对生态系统产生持续的影响。文章为研究蔬菜种植区土壤中有机氯农药残留污染状况,采集某蔬菜种植区土壤中土壤样本,通过气相色谱仪检定土壤有机氯农药残留量。使用有机氯农药后的蔬菜种植区土壤中,污染物检出率与质量分数最显著的是DDTs、HCHs。DDTs水溶性、迁移性较差,吸附性显著,在土壤中历史残留污染性更显著;HCHs降解难度低,且挥发性显著,在使用农药当日污染物最显著,但是残留量会因降解而降低。
The use of pesticides can affect key ecological processes such as organic matter decomposition and nutrient cycling in soil,and many pesticides have long-term residues in soil,which can have a sustained impact on the ecosystem.This article aims to study the pollution status of organochlorine pesticide residues in the soil of vegetable planting areas.Soil samples were collected from a certain vegetable planting area,and the amount of organochlorine pesticide residues in the soil was determined by gas chromatography.The results showed that DDTs and HCHs had the most significant pollutant detection rate and mass fraction in the soil of vegetable planting areas after the use of organochlorine pesticides.DDTs have poor water solubility and mobility,significant adsorption,and more significant historical residual pollution in soil;The degradation difficulty of HCHs is low,and their volatility is significant.The pollutants are most significant on the day of pesticide use,but their residual amount will decrease due to degradation.
作者
李大勇
Li Dayong(Shandong Province,Feicheng City,Anjizhuang Town convenience service center,Tai'an 271604,China)
出处
《环境科学与管理》
CAS
2024年第9期107-112,共6页
Environmental Science and Management
关键词
蔬菜种植区
土壤残留污染
有机氯农药
污染防控
回收率
vegetable planting area
soil residual pollution
organochlorine pesticide
pollution prevention and control
recovery rate
