摘要
目的了解六六六(hexachlorocyclohexanes,HCHs)与滴滴涕(dichloro diphenyl trichloroethanes,DDTs)在杭州湾南岸滩涂沉积物中的污染现状。方法于2018年4月采集杭州湾南岸地区4个采样点不同深度(0~80 cm)滩涂沉积物,利用气相色谱-串联质谱法(gas chromatography tandem mass spectrometry,GC-MS/MS)测定了该区域中HCHs与DDTs的含量,对其分布规律进行分析,使用共识沉积物质量基准法对其生态学风险进行了评估。结果所有样品中均检出HCHs与DDTs,含量分别为3.33~4.20μg/kg与3.37~4.73μg/kg,主要以β-HCH、δ-HCH以及DDE为主,其污染主要来源于历史性工业品,整体污染处于较低水平;20.3%的沉积物样品中DDEs含量以及28.1%的样品DDTs总量介于阈值效应浓度(threshold concentration,TECs)和可能效应浓度(probable effect concentration,PECs)之间。结论杭州湾南岸沉积物中HCHs与DDTs的污染处于较低水平,具有较小的生态学风险。
Objective To understand the pollution status of hexachlorocyclohexanes(HCHs)and dichloro diphenyl trichloroethanes(DDTs)in the sediments of the south bank of Hangzhou bay.Methods In April 2018,the sediments of different depths(0-80 cm)in tidal flat from the south bank of Hangzhou bay were collected.The contents of HCHs and DDTs were determined by gas chromatography tandem mass spectrometry(GC-MS/MS),the distribution of HCHs and DDTs were analyzed,and the ecological risk was assessed by consensus-based sediment quality guidelines.Results HCHs and DDTs were detected in all samples,and the contents were 3.33-4.20μg/kg and 3.37-4.73μg/kg(dry mass),respectively,which were mainlyβ-HCH,δ-HCH and DDE.The pollution mainly came from historical industrial products,and the overall pollution was at a low level.The content of DDEs in 20.3%sediment samples and the total amount of DDTs in 28.1%sediment samples were between threshold concentration(TECs)and probable effect concentration(PECs).Conclusion The pollution of HCHs and DDTs in the sediments of the south bank of Hangzhou bay is at a low level,which has a small ecological risk.
作者
陈晓燕
施家威
李继革
毛国华
CHEN Xiao-Yan;SHI Jia-Wei;LI Ji-Ge;MAO Guo-Hua(Zhejiang Medical College,Ningbo 315000,China;Zhejiang Key Laboratory of Health Risk Assessment Technology for Trace Toxic Chemicals,Ningbo Center for Disease Control and Prevention,Ningbo 315000,China)
出处
《食品安全质量检测学报》
CAS
北大核心
2021年第8期3392-3398,共7页
Journal of Food Safety and Quality
基金
浙江省公益技术研究计划(LGC20B070002)
宁波市领军和拔尖人才工程项目
宁波市自然科学基金项目(2016A610179)。
关键词
杭州湾南岸
沉积物
六六六
滴滴涕
south bank of Hangzhou bay
sediment
hexachlorocyclohexanes
dichloro diphenyl trichloroethanes
