title: Metal pollution in a contaminated bay: relationship between metal geochemical fractionation in sediments and accumulation in a polychaete.
abstract: Jinzhou Bay in Northern China has been seriously contaminated with metals due to the impacts of smelting activities. In this study, we investigated the relationship between metal accumulation in a deposit-feeding polychaete Neanthes japonica and metal concentration and geochemical fractionation (Cd, Cu, Pb, Zn and Ni) in sediments of Jinzhou Bay. Compared with the historical data, metals in the more mobile geochemical fraction (exchangeable and carbonate fractions) were gradually partitioned into the more stable fraction (Fe-Mn oxides) over time. Metal concentration and geochemical fractionation in sediment significantly affected metal bioavailability and accumulation in polychaetes, except for Ni. Metal accumulation in polychaetes was significantly influenced by Fe or Mn content, and to a lesser degree by organic matter. Prediction of metal bioaccumulation in polychaetes was greatly improved by normalizing metal concentrations to Mn content in sediment. The geochemical fractionation of metals in sediments including the exchangeable, organic matter and Fe-Mn oxides were important in controlling the sediment metal bioavailability to polychaetes.
authors.affiliation: Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China.
authors.forename: Wenhong
authors.initials: W
authors.lastname: Fan
authors.affiliation: College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, PR China; Key Laboratory of Occupational Safety and Health, Beijing Municipal Institute of Labor Protection, Beijing 100054, PR China.
authors.forename: Zhizhen
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Division of Life Science, State Key Laboratory of Marine Pollution, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong. Electronic address: wwang@ust.hk.
authors.forename: Wen-Xiong
authors.initials: WX
authors.lastname: Wang
mesh_terms: D000818:Animals; D061006:Bays; D002254:Carbonates / Q000737:chemistry; D005591:Chemical Fractionation; D002681:China; D004784:Environmental Monitoring; D005290:Ferric Compounds / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry; D007501:Iron / Q000737:chemistry / Q000493:pharmacokinetics; D008345:Manganese / Q000737:chemistry / Q000493:pharmacokinetics; D017895:Manganese Compounds / Q000737:chemistry; D008670:Metals / Q000032:analysis / Q000737:chemistry* / Q000493:pharmacokinetics; D010087:Oxides / Q000737:chemistry; D011077:Polychaeta / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000493:pharmacokinetics
chemical_list: D002254:Carbonates; D005290:Ferric Compounds; D017895:Manganese Compounds; D008670:Metals; D010087:Oxides; D014874:Water Pollutants, Chemical; C000499:ferric oxide; D008345:Manganese; C027424:manganese oxide; D007501:Iron
keywords: Bioaccumulation; Contaminated sediments; Geochemical fractionation; Metals