The measurement of metals by diffusive gradients in thin films (DGT) at sediment/water interface (SWI) of bay and remobilization assessment

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• 作者：Zhihao Wu ; Shengrui Wang ; Mengchang He ; Fengchang Wu
• 关键词：Metals ; Diffusive gradients in thin films (DGT) ; Sediment/water interface (SWI) ; Remobilization ; Flux ; Passive sampler
• 刊名：Environmental Earth Sciences
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：73
• 期：10
• 页码：6283-6295
• 全文大小：1,095 KB
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• 作者单位：Zhihao Wu (1) (2) (3) (4)
  Shengrui Wang (1) (2) (3)
  Mengchang He (4)
  Fengchang Wu (1) (2) (3)
  
  1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People’s Republic of China
  2. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Eco-environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People’s Republic of China
  3. Dongtinghu Lake Ecological Observation and Research Station (DEORS), Yueyang, 41400, Hunan Province, People’s Republic of China
  4. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People’s Republic of China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

The fine-scale profile (concentration/flux) of 14 metals at sediment/water interface (SWI) of Yingkou bay was measured by passive sampler-DGT (diffusive gradients in thin films) probe and HR-ICP-MS instrument. Fe profile in sediment porewater indicated redox reactions, which was verified by peaks at ?.75, ?.75, ?.75 and ?1.75?cm. Mn profile in sediment porewater indicated redox-sensitive character with the continuous increase in profile from ?.75 to ?.75?cm, and the subsequent peaks at ?.25, ?.25, ?.75 and ?1.25?cm. Both Fe and Mn profiles indicated low values at ?0.25?cm, which was due to the formation of pyrite and the adsorption of Mn on it. The co-occurrence of some peaks and broad feature near peaks of trace metals and Fe/Mn at same depths of profiles indicated coupled geochemical process and co-remobilization. The diffusive fluxes of metals across SWI were also calculated and investigated.