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Profiles and inventories of organic pollutants in sediments from the central Beibu Gulf and its coastal mangroves

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jun 2016Publisher:Elsevier BVJournal:Chemosphere, volume 153, pages 39-47 (issn: 0045-6535,

Authors: David Kaiser; David Kaiser; Detlef E. Schulz-Bull; Joanna J Waniek;

doi: 10.1016/j.chemosphere.2016.03.041

pmid: 27010165

Profiles and inventories of organic pollutants in sediments from the central Beibu Gulf and its coastal mangroves

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Abstract

Sediment cores from the central Beibu Gulf and its northern coastal mangroves were analyzed for polycyclic aromatic hydrocarbons (PAH), the organo-chlorine pesticides dichlorodiphenyltrichloroethane (DDT) and hexachlorobenzene (HCB), and polychlorinated biphenyls (PCB), to reconstruct the organic pollution history of developing south-west China. Reflecting regional development, in the gulf ∑PAH (38-74 ng g(-1)) decreased towards the surface after peak concentrations near 10 cm, while ∑DDT (ND - 0.5 ng g(-1)) increased due to fresh inputs, and HCB (ND - 0.04 ng g(-1)) occurred only in surface sediments. Profiles in mangrove sediments showed a continuing local scale increase in ∑PAH (29-438 ng g(-1)) as well as ∑DDT (0.2-41.0 ng g(-1)) and HCB (0.01-1.01 ng g(-1)) pollution, despite some variability. No trend was evident for ∑PCB (ND - 0.22 ng g(-1)), which was not detected in the central gulf. Calculated loads estimate that 2816 ng cm(-2) PAHs and 7 ng cm(-2) DDTs are stored in depositional areas of the Beibu Gulf. Mangrove sediments, threatened by land-use-change, contain 1400-4600 ng cm(-2) PAHs and 34-39 ng cm(-2) DDTs.

Related Organizations

Leibniz Center for Tropical Marine Research
Germany
Leibniz Institute for Baltic Sea Research
Germany
Leibniz Association
Germany

Keywords

China, Geologic Sediments, Polychlorinated Biphenyls, DDT, Hexachlorobenzene, Hydrocarbons, Chlorinated, Seawater, Pesticides, Polycyclic Aromatic Hydrocarbons, Water Pollutants, Chemical, Environmental Monitoring

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