期刊
MARINE POLLUTION BULLETIN
卷 110, 期 1, 页码 564-571出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.05.060
关键词
Heavy metals; Yangtze River estuary; Spatial distribution; Ecological risk assessment; Geographic information system
资金
- National Natural Science Foundation of China [41571486]
- Ministry of education and Social Science Fund [14YJAZH048]
- CRSRI Open Research Program [CKWV2014223/KY]
- National Basic Research Program of China (973 Project) [2010CB429003]
To analyze the spatial distribution patterns and ecological risks of heavy metals, 30 sediment samples were taken in the Yangtze River Estuary (YRE) in May 2011. The content of Al, As, Cr, Cu, Fe, Mn, Ni and Pb increased as follows: inner-region < river mouth < adjacent sea. According to I-geo and RI, As, Cr and Cd were the main pollutants. What is more, the greatest contaminated area appeared at the river mouth of the south branch of YRE. In Tucker 3, considering the fractions of metals, Mn turned to be the severest pollutant and As did not contribute too much to the contamination of the YRE. That was most probably because that Mn was closely related to the carbonate associated (CARE) and As was related to organic-associated (OM) which is more stable than CARB. The fractions played an important role in the contamination assessment of heavy metals. (C) 2016 Elsevier Ltd. All rights reserved.
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