Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 27, Issue 10, Pages 10802-10810Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-019-07581-x
Keywords
Heavy metals; Grain size; Ecological risk; Sediments; Yangtze River Estuary
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Funding
- National Natural Science Foundation of China [41106108]
- Special Fund for Public Welfare Industrial Research of the Ministry of Land and Resources of China [201011019-05]
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Sediments core within the Yangtze River Estuary was collected for metal and grain size analysis. The vertical distribution characteristics of eight metals along the core were investigated based on Cs-137 and Pb-210 radionuclide dating. The sediment was mainly composed of sand and silt. The metals concentrations were Al, 4.67-6.83; Fe, 2.3-3.94; Mn, 0.046-0.07; Cr, 69.5-103; Cu, 14.3-32.1; Zn, 47.3-96.7; Cd, 0.037-0.212; Pb, 13.7-23; Ni, 18.8-38.9 (mg center dot kg(-1), except Al, Fe, and Mn as %), respectively. Geoaccumulation indexes (I-geo) indicated that Cu, Zn, and Pb were of pollution-free level; Cd, Cr, and Ni were in a slight polluted level. Based on potential ecological risk factors (EI), Cd posed a moderate risk to the local environment. Correlation analysis showed that Fe, Al, and Mn had a close association with Cu, Zn, Pb, and Ni at p < 0.01. Clay was significantly correlated with other metals except Cr and Cd.
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