文献类型：期刊文献

英文题名：Pyrogenic PAHs Have Different Biogeochemical Fates in the Eastern Indian Ocean

作者：Liu, Mengyang[1,2,3,4,8];Zheng, Haowen[1,2];Li, Hongliang[5];Chen, Fajin[6,7];Cui, Bowen[1,2];Lou, Linghao[1,2];Wang, Weimin[1,2];Zhang, Haifeng[5];Chen, Chunqing[6,7];Lin, Huiju[3,4];Jiang, Yan[3,4];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 361102, Peoples R China;[2]Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China;[3]City Univ Hong Kong, Dept Chem, State Key Lab Marine Pollut, Hong Kong 999077, Peoples R China;[4]City Univ Hong Kong, Sch Energy & Environm, Hong Kong 999077, Peoples R China;[5]Minist Nat Resources, Inst Oceanog 2, Key Lab Marine Ecosyst Dynam, Hangzhou 310012, Peoples R China;[6]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[7]Guangdong Ocean Univ, Key Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Peoples R China;[8]City Univ Hong Kong, Shenzhen Res Inst, Res Ctr Oceans & Human Hlth, Shenzhen 518057, Peoples R China

年份：2024

卷号：58

期号：50

起止页码：22405

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:001369545500001)、、EI(收录号：20244917488598)、Scopus(收录号：2-s2.0-85211025161)、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). 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：polycyclic aromatic compounds (PACs); marine sediments; machine learning; stable isotopes; Bay of Bengal

外文摘要：Understanding the fate of polycyclic aromatic hydrocarbons (PAHs) in the deep ocean is crucial for elucidating the biogeochemical cycle of organic carbon under anthropogenic influences. In this study, surface sediments were collected from the deep sea of the Eastern Indian Ocean (water depth: 2161-4545 m) and analyzed for 29 semivolatile organic compounds (SVOCs), including parent PAHs and their alkylated derivatives, as well as source biomarkers. The target SVOCs (& sum;29SVOCs: 23.0-183 ng/g, & sum;16PAHs: 11.3-93.3 ng/g) were mainly from pyrogenic sources, namely coal combustion, traffic emissions, and wood burning. The contributions from wood burning and coal combustion exhibited distinct trends with increasing total organic carbon contents, suggesting different dominant biogeochemical behaviors. Major fractions of PAHs from wood burning can be biodegraded or photodegraded, leading to a depletion-dominated fate in the water column. Conversely, PAHs from coal combustion showed an accumulation-dominated fate via their sedimentation due to their persistence and hydrophobicity. This study highlights the distinct biogeochemical fates of PAHs from biomass or fossil fuel combustion in deep oceans and has implications for the marine cycle of refractory organic carbon under anthropogenic impacts.