State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 510301, China; Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China.
Sci Total Environ. 2020 Mar 25;710:136335. doi: 10.1016/j.scitotenv.2019.136335. Epub 2019 Dec 28.
The concentrations of persistent organic pollutants (POPs) in sediments from the Eastern Indian Ocean were analyzed by GC-MS/MS to explore the status of contamination, distribution and their potential sources and risk. The average (±SD) concentrations of total polycyclic aromatic hydrocarbons (∑PAHs), polybrominated diphenyl ethers (∑PBDEs), dechlorane plus (∑DP), organochlorine pesticides (∑OCPs) and polychlorinated biphenyls (∑PCBs) in sediments were 79,900 ± 31,400, 173 ± 62, 42 ± 24, 1051 ± 305 and 147 ± 24 pg g dw (or 11,200 ± 7200, 28 ± 26, 6 ± 6, 168 ± 121 and 24 ± 17 ng g organic carbon), respectively. The concentrations of POPs in sediments were generally at low to median levels compared to those recorded in other ocean sediments. Composition analyses suggest that PAHs originate from both petrogenic and pyrogenic sources, while dichlorodiphenyltrichloroethane (DDT) mainly comes from technical-DDT, hexachlorocyclohexane (HCH) from lindane, and chlordane from fresh inputs. The risk assessments show that the targeted chemicals except for chlordane and naphthalene in sediments do not pose potential biological effects to the organisms in the Eastern Indian Ocean. The present study contributes to the very rare data on PAHs, PBDEs, DP, OCPs and PCBs in the vast deep-ocean and will deepen our knowledge of the fate of POPs in ocean environments.
采用 GC-MS/MS 分析了东印度洋沉积物中持久性有机污染物 (POPs) 的浓度，以探讨其污染状况、分布及其潜在来源和风险。沉积物中总多环芳烃（∑PAHs）、多溴联苯醚（∑PBDEs）、十氯酮加合物（∑DP）、有机氯农药（∑OCPs）和多氯联苯（∑PCBs）的平均（±SD）浓度分别为 79900±31400、173±62、42±24、1051±305 和 147±24pg/g 干重（或 11200±7200、28±26、6±6、168±121 和 24±17ng/g 有机碳）。与其他海洋沉积物相比，POPs 在沉积物中的浓度通常处于低至中水平。组成分析表明，PAHs 既有生源又有生源，而滴滴涕（DDT）主要来自技术 DDT，六氯环己烷（HCH）来自林丹，氯丹来自新鲜输入。风险评估表明，沉积物中除氯丹和萘外的目标化学物质对东印度洋生物没有潜在的生物效应。本研究为在广阔的深海中 PAHs、PBDEs、DP、OCPs 和 PCBs 的罕见数据做出了贡献，并加深了我们对海洋环境中 POPs 归宿的认识。
