1. Trace metal pollution and carbon and nitrogen isotope tracing through the Yongdingxin River estuary in Bohai Bay, Northern China.
- Author
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Sun C, Wei Q, Ma L, Li L, Wu G, and Pan L
- Subjects
- Bays, Carbon Isotopes, China, Geologic Sediments, Metals, Heavy, Nitrogen Isotopes, Environmental Monitoring, Estuaries, Rivers, Water Pollutants, Chemical
- Abstract
A tide gate was built in 2010 to prevent seawater from moving upstream into the Yongdingxin River estuary in Bohai Bay, Northern China. We analysed the concentrations of Hg, Cd, Pb, TOC, TN, δ
13 C and δ15 N and studied their variations in the surface layer and vertical profiles of sediment cores collected from the Yongdingxin River estuary. Contamination factors and geo-accumulation indices were calculated for each metal, which revealed high levels of contamination for Hg and Cd in the sediments, likely from anthropogenic sources. δ13 C and δ15 N were used as natural tracers to determine the sources of TOC and TN. The results revealed that sewage was the main source of TOC, while TN may have more than one source in the Yongdingxin River estuary. Sewage dominated trace metal pollution in the Yongdingxin River estuary. Our results provide a baseline for trace metal contamination in an estuary facing a large water project., (Copyright © 2016 Elsevier Ltd. All rights reserved.)- Published
- 2017
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