Distributions of organochlorine compounds in sediments from Jiulong River Estuary and adjacent Western Taiwan Strait: Implications of transport, sources and inventories.
Distributions of organochlorine compounds in sediments from Jiulong River Estuary and adjacent Western Taiwan Strait: Implications of transport, sources and inventories.
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DOI：
10.1016/j.envpol.2016.05.081
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发表时间：
2016-12
影响因子：
8.9
通讯作者：
Yuling Wu;Xinhong Wang;Miaolei Ya;Yongyu Li;H. Hong
中科院分区：
文献类型：
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作者：
Yuling Wu;Xinhong Wang;Miaolei Ya;Yongyu Li;H. Hong
河口和沿海地区受到人为活动造成的陆地输入的强烈影响。为了研究有机氯化合物(OCS)从河流到边缘海的分布、来源、潜在运移和负荷，对九龙江口和邻近台湾海峡西部内陆架的表层沉积物中有机氯农药(OCPs)和多氯联苯(PCbs)进行了调查。有机氯农药和多氯联苯的浓度分别为5.2~551.7和1.0~8.1ngg−1(干重)。JRE的有机氯农药浓度高于邻近水域，且随河口至外海距离的增加呈下降趋势。从当地一家航运公司渔船上的防污涂料推断，河口上游的滴滴涕浓度相当高。根据已制定的沉积物质量指南，JRE中的滴滴涕构成了潜在的生态风险。河口的六氯环己烷主要来源于农业土壤中风化的六氯环己烷，主要来源于当地主要河流的径流。有机氯农药的模式表明，南岸的有机氯农药是通过河流输入的本地来源，而北岸的有机氯农药是由闽浙沿岸洋流的长距离输送产生的。多氯联苯的浓度和同系物的变化很小，表明多氯联苯不是农业区的主要污染物，反映工业多氯联苯的一致较轻的多氯联苯是通过东亚季风的大气沉降输送的。此外，DDT的初步分布模式和计算出的相当大的质量库存和负担(258.1 ng/cm−2和10.4t OCPs)高于珠江三角洲和长江三角洲，表明研究区的污染沉积物可能是全球海洋OCPs的潜在来源。
Estuaries and coastal areas strongly influenced by terrestrial inputs resulted from anthropogenic activities. To study the distributions, origins, potential transport and burden of organochlorine compounds (OCs) from river to marginal sea, organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were investigated in surface sediments collected from a subtropical estuary (Jiulong River Estuary, JRE) and the inner shelf of adjacent Western Taiwan Strait (WTS). The concentrations of OCPs and PCBs were from 5.2 to 551.7 and 1.0–8.1 ng g−1(dry weight), respectively. OCP concentrations in the JRE were higher than in adjacent WTS, and a decreasing trend with the ascending distance from the estuary to the open sea was observed. Concentrations of DDTs were quite high in the upper reach of the estuary, inferred from antifouling paint on fishing boats of a local shipping company. According to established sediment quality guidelines, DDTs in the JRE posed potential ecological risk. HCHs in the estuary were mainly derived from the weathered HCHs preserved in the agriculture soils via local major river runoffs.OCPs patterns showed that OCPs in the south coast of WTS were resulted from local sources via river input, while OCPs in the north coast attributed to the long-range transport derived by the Fujian-Zhejiang Coastal Current.Minor variations of PCB concentrations and homologs indicated that PCBs were not the main pollutant in the agricultural region, consistent lighter PCBs reflected industrial PCBs were transported via atmospheric deposition derived by East Asia Monsoon. Moreover, the primary distribution pattern founded for DDTs and the considerable mass inventories and burdens calculated (258.1 ng cm−2and 10.4 tones for OCPs) that higher than Pearl River Delta and Yangtze River Delta, together suggested that the contaminated sediments in the study area may be a potential source of OCPs to the global ocean.