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Field evidence and modeling validation of biogeochemical controls on the deposition of persistent organic pollutants in the deep ocean  ( SCI-EXPANDED收录 EI收录)   被引量:2

文献类型:期刊文献

英文题名:Field evidence and modeling validation of biogeochemical controls on the deposition of persistent organic pollutants in the deep ocean

作者:Liu, Mengyang[1,2,3,4,8];Zheng, Haowen[1,2];Li, Hongliang[5];Chen, Fajin[6,7];Lou, Linghao[1,2];Wang, Weimin[1,2];Zhang, Haifeng[5];Chen, Chunqing[6,7];Ye, Jiandong[1,2];Yan, Meng[3,4,8];Leung, Kenneth M. Y.[3,4,8];Cai, Minggang[1,2]

机构:[1]Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Peoples R China;[2]Xiamen Univ, Coll Ocean & Earth Sci, Xiamen, Peoples R China;[3]City Univ Hong Kong, Dept Chem, State Key Lab Marine Pollut, Hong Kong, Peoples R China;[4]City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Peoples R China;[5]Minist Nat Resources, Inst Oceanog 2, Key Lab Marine Ecosyst Dynam, Hangzhou, Peoples R China;[6]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang, Peoples R China;[7]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[8]City Univ Hong Kong, Res Ctr Oceans & Human Hlth, Shenzhen Res Inst, Shenzhen, Peoples R China

年份:2024

卷号:480

外文期刊名:JOURNAL OF HAZARDOUS MATERIALS

收录:SCI-EXPANDED(收录号:WOS:001359915400001)、、EI(收录号:20244717377712)、Scopus(收录号:2-s2.0-85208981474)、WOS

基金:The authors would like to thank the crew of R/V Xiangyanghong 06 for their helpful support during the international cooperation cruise named Joint Advanced Marine and Ecological Studies (JAMES). This study was funded by National Natural Science Foundation of China (NSFC) (U2005207, 42176039) and GuangDong Basic and Applied Basic Research Foundation (2023A1515110225). While preparing this manuscript, Mengyang Liu was supported by the State Key Laboratory of Marine Pollution at City University of Hong Kong which is funded by the Innovation and Technology Commission of the Hong Kong SAR Government. However, any opinions, findings, conclusions, or recommendations expressed in this publication do not reflect the views of the Hong Kong SAR Government.

语种:英文

外文关键词:Marine sediments; Bay of Bengal; Persistent toxic substances (PTSs); Ninetyeast Ridge; Random Forest Model

外文摘要:Deposition in the deep ocean plays a crucial role in the global sink of persistent organic pollutants (POPs), yet observation-based assessments of their biogeochemical cycling are scarce. In this study, surface sediments were collected from deep sea of the Eastern Indian Ocean (2161-4545 m) and analyzed for organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs). Long-range atmospheric transport was identified as the dominant pathway for OCPs (36.7-762.0 pg/g) and PCBs (25.5-110.0 pg/g) to reach the basin area from surrounding agricultural, manufacturing, and combustion emissions. Besides the TOC-dependent deposition, unique hydrodynamic conditions in the mid-ocean ridge might influence the transport and accumulation of POPs by altering their resuspension and repartitioning processes. Results of the machine learning analysis suggested that logKOW, TOC content, and pollutant residence time in the ocean are important parameters in determining PCB concentrations in the Indian Ocean. Additionally, concentrations of POPs generally exhibited logarithmic relationships with microplastic abundances, indicating that microplastics act as potential carriers for transporting these pollutants to deep-sea sediments. This study revealed the biogeochemical controls on the deposition of OCPs and PCBs in the Indian Ocean by combining field observation and model simulation. Given the rapid rate of surface warming and various biogeochemical responses in the Indian Ocean, it is recommended to conduct long-term, high-resolution field observations to understand the dynamic fate of POPs in these changing ocean environments.

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