Spatial distribution, vertical profiles and transport of legacy and emerging per- and polyfluoroalkyl substances in the Indian Ocean

被引：33

作者：

Han, Tongzhu ^{[1
,2
,3
,4
]}

Chen, Junhui ^{[1
,2
,4
]}

Lin, Kun ^{[3
]}

He, Xiuping ^{[1
,2
,4
]}

Li, Shujiang ^{[5
]}

Xu, Tengfei ^{[5
]}

Xin, Ming ^{[1
,2
,4
]}

Wang, Baodong ^{[1
,2
,4
]}

Liu, Chenguang ^{[6
]}

Wang, Jiangtao ^{[3
]}

机构：

[1] Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Ecoenvironm Sci & Technol, Marine Bioresource & Environm Res Ctr, Qingdao 266061, Peoples R China

[2] Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China

[3] Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China

[4] Qingdao Key Lab Analyt Technol Dev & Standardizat, Qingdao 266590, Peoples R China

[5] Minist Nat Resources, Key Lab Marine Sci & Numer Modeling, Inst Oceanog 1, Qingdao 266061, Peoples R China

[6] Minist Nat Resources, Key Lab Marine Geol & Metallogeny, Inst Oceanog 1, Qingdao 266061, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2022年 / 437卷

基金：

中国国家自然科学基金;

关键词：

Open Ocean; Surface seawater; HFPO-DA; Mass transport estimates; Interbasin exchange; POLY-FLUOROALKYL SUBSTANCES; POLYFLUORINATED COMPOUNDS; PERFLUOROALKYL ACIDS; FLUORINATED ALTERNATIVES; PERFLUORINATED ACIDS; ATLANTIC; PFASS; CIRCULATION; ATMOSPHERE; CURRENTS;

D O I：

10.1016/j.jhazmat.2022.129264

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The contamination status and transport of per- and polyfluoroalkyl substances (PFASs) in the seawater of the Indian Ocean (IO) and an adjacent subregion of the Northwest Pacific Ocean (NWPO) were investigated. Eight legacy PFASs were widely distributed in the surface seawater, and perfluoroheptanoic acid (PFHpA) and perfluorooctanoic acid (PFOA) were the two predominant PFASs. Sigma PFAS concentration decreased in the following order: NWPO>Joining area of Asia and Indian-Pacific Oceans (JAIPO)>Northeast Indian Ocean>Southwest Indian Ocean. Hexafluoropropylene oxide-dimer acid, a replacement surfactant for PFOA was extensively detected in the IO (~34.8 pg/L) for the first time, showing an early sign of emerging PFAS spread in global open oceans. Eight depth profiles across the JAIPO (down to 5433 m depth) revealed a "surface-enrichment" and "depth-depletion" pattern for PFASs in the water column, and two noticeable fluctuations were mainly located at depths of 150-200 and 200-500 m. Physical processes, including eddy diffusion, and the origin and trajectory of water mass were crucial factors for structuring PFAS vertical profiles. Mass transport estimates revealed a remarkable PFOA contribution through the JAIPO to IO carried by the Indonesian Throughflow, and anonnegligible PFHpA contribution from Antarctic Immediate Water to deep water of the JAIPO driven by thermohaline circulation.

引用

页数：11

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