Sediment properties and trace metal pollution assessment in surface sediments of the Laizhou Bay, China

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• 作者：Gang Xu ; Jian Liu ; Shaofeng Pei…
• 关键词：Sediment properties ; Trace metal ; Pollution assessment ; Transportation ; Laizhou Bay
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：22
• 期：15
• 页码：11634-11647
• 全文大小：2,381 KB
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• 作者单位：Gang Xu (1) (2) (3)
  Jian Liu (1) (2) (3)
  Shaofeng Pei (1) (2) (3)
  Maosheng Gao (1) (2) (3)
  Gang Hu (1) (2) (3)
  Xianghuai Kong (1) (2) (3)
  
  1. Key Laboratory of Marine Hydrocarbon Resources and Environment Geology, Ministry of Land and Resources, Qingdao, 266071, China
  2. Function Laboratory for Marine Geology, National Oceanography Laboratory, Qingdao, 266061, China
  3. Key Laboratory of Coastal Wetland Biogeosciences, China Geological Survey, Qingdao, 266071, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

Spatial distribution, ecological risk, pollutant source, and transportation of trace metals in surface sediments, as well as the sediment properties, were analyzed in this study to assess the pollution status of trace metal in the Laizhou Bay, China. Results of provenance analyses indicate that surface sediments were primarily from weathering products carried by the surrounding short rivers and partially from loess matters carried by the Yellow River. Variations of trace metal concentrations were mostly controlled by the accumulation of weathering products, organic matters, and the hydrodynamics. Geoaccumulation index suggests that no Cr pollution occurred in the study area, and Cu, Pb, and Zn pollutions appeared only at a few stations. Comparatively, Cd and As pollutions were at noticeably weak to moderate level at many stations. The combination of six trace metals in this study had a 21?% probability of being toxic in our study area based on sediment quality guidelines. Enrichment factors (EFs) and statistical analyses indicate that Cu, Pb, and Zn were primarily derived from the natural process of weathering. By contrast, Cd, As, and Cr (especially Cd and As) were provided by the anthropogenic activities to a large extent. Due to the dilution of coarse-grained sediments, there was even no contamination at some of stations that were obviously influenced by humans. Based on the current study of transportation process of fine-grained sediments in combination with the spatial distribution of EFs, it is found that the migration of anthropogenic trace metals was mainly controlled by the tide in the Laizhou Bay. The study suggests that an effective strategies and remedial measures should be designed and undertaken to prevent further anthropogenic Cd and As pollutions in this area in the future.