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Perfluoroalkyl substances and organochlorine pesticides in sediments from Huaihe watershed in China

机译：中国淮河流域沉积物中的全氟烷基物质和有机氯农药

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Twelve perfluoroalkyl substances (PFASs) and nine organochlorine pesticides (OCPs) were quantified in surface sediments from the Huaihe River, China, along which there are intensive industrial and agricultural activities. Concentrations of PFASs ranged from 0.06 to 0.46 ng/g thy weight (dw), and concentrations of OCPs ranged from 1.48 to 32.65 ng/g dw. Compared with other areas in China, concentrations of PFASs were lesser than the national mean value, while concentrations of OCPs were moderate. Concentrations of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) ranged from n.d. (not detected) to 0.03 and n.d. to 0.10 ng/g dw, respectively. Among the three groups of OCPs, mean concentrations of hexachlorocydohexane and its isomers (HCHs), dichlorodiphenyltrichloroethane and its metabolites (DDTs) and hexachlorobenzene (HCB) were 5.62 +/- 4.35, 2.43 +/- 3.12 and 1.55 +/- 4.17 ng/g dw, respectively. Concentrations of HCHs and DDTs decreased from upstream to downstream along the mainstream of the Huaihe River. When compared to sediment quality guidelines (SQGs), concentrations of HCHs, DDTs and HCB would pose adverse biological effects. In general, contamination by PFASs in the upstream of the Huaihe River was more severe than that in the downstream, which was mainly caused by interception from dams, locks and industrial emissions. And OCPs from tributaries, especially the Yinghe River and Wohe River, were higher than those from Huaihe mainstream, and primarily came from historical inputs. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
机译：在来自淮河的表层沉积物中，对十二种全氟烷基物质（PFASs）和九种有机氯农药（OCPs）进行了定量分析，沿这些沉积物进行了密集的工农业活动。 PFAS的浓度范围为0.06至0.46 ng / g重量（dw），OCP的浓度范围为1.48至32.65 ng / g dw。与中国其他地区相比，全氟辛烷磺酸的浓度低于全国平均值，而OCP的浓度中等。全氟辛酸（PFOA）和全氟辛烷磺酸盐（PFOS）的浓度范围为n.d. （未检测到）0.03和n.d.分别降至0.10 ng / g dw。在三类OCP中，六氯环己烷及其异构体（HCH），二氯二苯基三氯乙烷及其代谢物（DDT）和六氯苯（HCB）的平均浓度为5.62 +/- 4.35、2.43 +/- 3.12和1.55 +/- 4.17 ng / g dw分别。沿淮河干流，六氯环己烷和滴滴涕的浓度从上游到下游下降。与沉积物质量准则（SQG）相比，六氯环己烷，滴滴涕和六氯代苯的浓度会对生物造成不利影响。总体而言，淮河上游的PFAS污染比下游的污染更为严重，这主要是由于大坝，闸门和工业排放物的拦截所致。支流，特别是the河和卧河的OCP高于淮河主流的OCP，主要来自历史数据。 （C）2014中国科学院生态环境研究中心。由Elsevier B.V.发布

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