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不同种源延胡索及土壤中有机氯农药残留特征及安全评价
刘 雷1, 戚 特1, 赵 丰1, 吕 洁1, 张 行1, 陈华华1, 祁俊生2, 陈书鸿1
1.重庆三峡学院环境与化学工程学院;2.三峡库区水环境演变与污染防治重点实验室
摘要:
以万州、开县实验基地土壤和9个种源延胡索为研究对象,使用气相色谱–电子捕获检测器(GC-ECD)检测了土壤和延胡索中有机氯农药(OCPs)残留量,分析其残留特征和生态安全。结果表明:①在土壤和延胡索样品中均检出了滴滴涕(DDTs)和六六六(HCHs),DDTs的检出率分别为100% 和83.3%,HCHs的检出率分别为72.2% 和100%。DDTs和HCHs残留量具有较大的离散性和一定的区域差异性。②在土壤样品中,检出率较高的是4,4'-DDE和α-HCH,分别为100% 和66.7%。4,4'-DDE和α-HCH是OCPs残留的主要成分。③在延胡索样品中,检出率较高的是α-HCH、4,4'-DDE和β-HCH,分别为100%、77.8% 和55.6%,3种成分占OCPs残留量的73.7%。延胡索对α-HCH和4,4'-DDE有很强的生物富集作用,富集因子分别约为1.8和0.65。④实验基地土壤OCPs残留符合《土壤环境质量标准》二级标准,属于尚清洁水平,延胡索的OCPs残留量符合《药用植物及制剂外经贸委绿色行业标准》。
关键词:  延胡索  土壤  有机氯农药残留  残留特征  安全评价
DOI:10.13758/j.cnki.tr.2019.02.019
分类号:X53
基金项目:重庆市应用开发计划项目(cstc2014yykfA110024),三峡库区水环境演变与污染防治重点实验室基金项目(WEPKL2012MS-06)和重庆三峡学院大学生创新计划项目(国家级201610643002)资助。
Characteristics and Evaluation of Organochlorine Pesticide Residues in Rhizoma Corydalis of Different Provenances and Soil
LIU Lei1, QI Te1, ZHAO Feng1, LV Jie1, ZHANG Hang1, CHEN Huahua1, QI Junsheng2, CHEN Shuhong1
1.College of Environmental and Chemical Engineering, Chongqing Three Gorges University;2.Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir
Abstract:
The residual contents of organochlorine pesticide (OCPs) in rhizoma corydalis of different provenances and in soils collected from the experimental bases in Wanzhou and Kaixian of Chongqing were determined by gas chromatography with electron capture detector (GC-ECD), and the residual characteristics and ecological security of OCPs were also analyzed. The results showed that:1) DDTs and HCHs were detected both in soils and in rhizoma corydalis with the detection rates of 100% and 83.3% for DDTs, and of 72.2% and 100% for HCHs, respectively. The residual quantities of DDTs and HCHs had greater discreteness and inter-regional differences. 2) In soil samples, 4,4'-DDE and α-HCH had higher detection rates, which were 100% and 66.7%, respectively. 4,4'-DDE and α-HCH were the main components of OCPs’ residue. 3) In the rhizoma corydalis samples, α-HCH, 4,4'-DDE and β-HCH were detected, the detection rates were 100%, 77.8% and 55.6%, respectively. The three components accounted for 73.7% of OCPs’ residue. Rhizoma corydalis had a strong bioconcentration on α-HCH and 4,4'-DDE, enrichment factors was about 1.8 and 0.65, respectively. OCPs’ residue in experimental base was in line with the requirements of the 2nd standard of Environmental Quality Standard for Soils, which was in the safe level. OCPs’ residue in rhizoma corydalis was in line with the requirements of Green Standards of Medicinal Plants and Preparations for Foreign Trade and Economy.
Key words:  Rhizoma corydalis  Soil  Organochlorine pesticide residues  Residual characteristics  Risk assessment

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