期刊
ENVIRONMENTAL POLLUTION
卷 191, 期 -, 页码 50-57出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.04.014
关键词
Metals; Contaminated sediments; Geochemical fractionation; Bioaccumulation
资金
- Natural Science Foundation of China [40871215]
- Major Science and Technology Program for Water Pollution Control and Treatment of China [2012ZX07501001]
- China's National Basic Research Program [2011CB935700]
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. (C) 2014 Elsevier Ltd. All rights reserved.
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