摘要
通过在贵州主要农作物种植区域采集5 cm、10 cm、15 cm深度的土壤样品,检测其中22种OCPs的残留量。结果表明:在所有水稻土壤样品中除了环氧七氯-A、反式九氯和狄氏剂未检出外,其余19种OCPs均有不同程度检出;OCPs在上述3种深度土壤中总残留量分别为0.526 ng/g、0.497 ng/g、1.605 ng/g。DDTs在3种深度水稻土壤中的总残留量(0.359 ng/g)低于HCHs总残留量(1.135 ng/g)。水稻土壤中γ-HCH、δ-HCH残留量显著高于玉米土壤。水稻土壤中HCHs和硫丹残留主要源自历史上工业制剂的使用,DDTs在水稻土壤中的降解方式主要为厌氧。农作物种植区域土壤中OCPs残留量均符合国家农用地土壤污染风险管控标准。
The residues of 22 kinds of OCPs were detected by collecting soil samples at depths of 5 cm,10 cm and 15 cm in the main crop planting areas in Guizhou.The results showed that except Heptachloro-A epoxide,trans-Nonachlor and Dieldrin,the remaining 19 OCPs were detected to varying degrees in all the paddy soil samples.The total residues of OCPs in the above three soil depths were 0.526 ng/g,0.497 ng/g,and 1.605 ng/g,respectively.The total residue of DDTs(0.359 ng/g)in the three soil depths was lower than that of HCHs(1.135 ng/g).The residues of γ-HCH and δ-HCH in paddy soil were significantly higher than those in corn soil.The residues of HCHs and endosulfan in paddy soil were mainly derived from the historical use of industrial agents.The degradation mode of DDTs in paddy soil was mainly anaerobic.The residue of OCPs in soil conformed to the national risk control standard for soil contamination of agricultural land.
作者
赵志燊
余磊
ZHAO Zhi-shen;YU Lei(Key Laboratory of Critical Technology for Degradation of Pesticide Residues in Superior Agro-products in Guizhou Ecological Environment,Guiyang University,Guiyang,Guizhou 550005,China)
出处
《环境监测管理与技术》
CSCD
2023年第4期29-33,共5页
The Administration and Technique of Environmental Monitoring
基金
贵州省教育厅青年科技人才成长“贵州水稻中OCPs残留现状研究及健康风险评估”基金资助项目[黔教合KY字(2018)296]
贵州省教育厅贵州生态环境中优势农产品残留农药降解关键技术研究重点实验室基金资助项目[黔教合KY字(2018)005]。
关键词
有机氯农药
残留特征
差异性
农作物土壤
贵州
Organochlorine pesticides
Residual characteristic
Difference
Farmland soil
Guizhou
