Characterization of polychlorinated biphenyl congeners in surface sediments of the Changjiang Estuary and adjacent shelf by high-resolution sampling and high-resolution mass spectrometry. Issue 1 (15th November 2017)

• Record Type: Journal Article
• Authors: Liu, Aifeng; Wang, Yawei; Xian, Mo; Zhao, Zongshan; Zhao, Bin; Wang, Jinpeng; Yao, Peng
• Is Part Of: Marine pollution bulletin. Volume 124:Issue 1(2017)
• Page Start: 496
• Page End: 501
• Publication Date: 2017-11-15
• Subjects: Polychlorinated biphenyl -- Sediment -- Changjiang Estuary -- Distribution -- High-resolution; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2017.07.036
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: Due to limited samples and low-resolution analysis, conflicting findings on major polychlorinated biphenyl (PCB) congeners and their origins remain in the East China Sea (ECS). Based on high-resolution sampling and high-resolution mass spectrometry analysis, 72 surface sediment samples from the Changjiang Estuary and adjacent ECS shelf were determined to characterize 39 PCB congeners. PCBs (∑39 PCBs) ranged from 0.003 to 16.18 ng/g dw, presenting a decreasing seaward trend. Tri-, tetra- and penta-CBs were the main components, accounting for > 64% of ∑39 PCBs in most samples. Tetra-CBs were the dominant congeners, corresponding to results of sediments from Changjiang middle reach and soils from Changjiang Delta. Comparison between PCBs and sediment properties indicated there may be a deposition boundary of 30°N. In the north, the spatial distribution of PCBs is controlled by Changjiang input and hydrodynamic conditions, while in the south closely related to combination of local source and riverine input. Highlights: PCB deposition characteristics were studied in ECS and adjacent shelf. We analyzed 39 PCB congeners by high-resolution sampling and high-resolution MS. Low chlorinated PCBs were main components and tetra-CBs were dominant congeners. A boundary of 30°N was found based on PCB deposition characteristics and sources.