title: Profiles and inventories of organic pollutants in sediments from the central Beibu Gulf and its coastal mangroves.
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.
authors.affiliation: Leibniz Institute for Baltic Sea Research Warnemünde, Seestr. 15, 18199 Rostock, Germany; Leibniz Center for Tropical Marine Ecology, Fahrenheitstr. 6-8, D-28359 Bremen, Germany. Electronic address: david.kaiser@io-warnemuende.de.
authors.forename: David
authors.initials: D
authors.lastname: Kaiser
authors.affiliation: Leibniz Institute for Baltic Sea Research Warnemünde, Seestr. 15, 18199 Rostock, Germany. Electronic address: deltef.schulz-bull@io-warnemuende.de.
authors.forename: Detlef E
authors.initials: DE
authors.lastname: Schulz-Bull
authors.affiliation: Leibniz Institute for Baltic Sea Research Warnemünde, Seestr. 15, 18199 Rostock, Germany. Electronic address: joanna.waniek@io-warnemuende.de.
authors.forename: Joanna J
authors.initials: JJ
authors.lastname: Waniek
mesh_terms: D002681:China; D003634:DDT / Q000032:analysis; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D006581:Hexachlorobenzene; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D010575:Pesticides / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D012623:Seawater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical; D006581:Hexachlorobenzene; D003634:DDT; D011078:Polychlorinated Biphenyls
keywords: Mass inventory; Organo-chlorine pesticides; Pollution trends; Polycyclic aromatic hydrocarbons; Sediment cores; South China Sea