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Spatial and Vertical Distribution of Dechlorane Plus in Mangrove Sediments of the Pearl River Estuary, South China

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Abstract

Thirty surface sediments and three sediment cores were collected from mangrove wetlands in the Pearl River Estuary of South China to investigate the spatial and vertical distribution of Dechlorane Plus (DP). DP concentrations in the mangrove surface sediments ranged from 0.0130 to 1.504 ng/g dry weight (dw). DP concentrations in sediments from Shenzhen were significantly greater than those from Guangzhou and Zhuhai. Anti-Cl11-DP, the dechlorinated product of anti-DP, was also detected in the mangrove sediments with concentrations ranged from not detected to 0.0198 ng/g dw. Significant positive relationship between anti-Cl11-DP and anti-DP levels was observed in the mangrove sediments, suggesting that photo and/or microbial degradation of anti-DP might occur in the sediments. The f anti values in the mangrove sediments were close to those in the technical DP products, suggesting that stereoselective enrichment of anti-DP may not exist in the mangrove sediments. DP concentrations in the mangrove sediment cores generally showed an increasing trend from the bottom to top layers. This is the first study to report the occurrence of DP and its degradation product in the mangrove wetlands.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (Grants Nos. 41573084, 41401576, 41230639, and 21407155), the National Basic Research Program of China (Grant No. 2015CB452902), the Hong Kong Scholars Program (Grant No. XJ2015046), China Postdoctoral Science Foundation (Grant No. 2016M590823) and Science and Technology Planning Project of Guangdong Province, China (Grant No. 2014B030301064).

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Authors and Affiliations

  1. Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China

    Yu-Xin Sun, Zai-Wang Zhang, Xiang-Rong Xu, Qin-Wei Hao, Yong-Xia Hu & Zeng-Hui Diao

  2. College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China

    Xiao-Bo Zheng

  3. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China

    Xiao-Jun Luo & Bi-Xian Mai

  4. University of Chinese Academy of Sciences, Beijing, 100049, China

    Qin-Wei Hao & Yong-Xia Hu

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  1. Yu-Xin Sun
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  2. Zai-Wang Zhang
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  9. Bi-Xian Mai
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Correspondence to Xiang-Rong Xu.

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Sun, YX., Zhang, ZW., Xu, XR. et al. Spatial and Vertical Distribution of Dechlorane Plus in Mangrove Sediments of the Pearl River Estuary, South China. Arch Environ Contam Toxicol 71, 359–364 (2016). https://doi.org/10.1007/s00244-016-0296-2

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  • DOI: https://doi.org/10.1007/s00244-016-0296-2

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