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Impacts of water-sediment regulation event on the distributions of particulate metals in the Huanghe (Yellow River) estuary |
FU Xiao-ming1, REN Jing-ling1,2, XIN Cheng-lin1, ZHANG Gui-ling1,2, LIU Zhe3 |
1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; 2. Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; 3. Key Laboratory of Marine Ecosystem and Environment, Ministry of Education, Ocean University of China, Qingdao 266100, China |
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Abstract Suspended particulate matter (SPM) samples were collected in the Huanghe (Yellow River) estuary before, during and after the Water-Sediment Regulation Scheme (WSRS) in June-July 2009. The concentrations of metal elements (Al, Fe, Mn, Cr, Cu, Ni, V, Zn) were determined by ICP-AES after digestion. Multivariate statistical methods were used to discuss the impact of the WSRS on the variability of particulate heavy metal concentrations and the pollution status in the Huanghe estuary. The results indicated that the concentrations of particulate heavy metals increased during the WSRS and decreased with the increase in salinity in the estuary. The variability of particulate metal concentrations reduced significantly after the normalization by Al, indicating the effects of grain size. Enrichment factor (EF) results showed that Cu and Zn were relatively enriched and the pollution was intensified after the WSRS. Concentrations of particulate metals in the study area were mainly controlled by source geology and provenance, as well as affected by human activity.
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Received: 18 September 2017
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