Heavy Metal Speciation in Sediments and the Associated Ecological Risks in Rural Rivers in Southern Jiangsu Province, China
| Autor: | Dejian Wang, Luji Bo, Gang Zhang, Can Wang |
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| Rok vydání: | 2014 |
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| Zdroj: | Soil and Sediment Contamination: An International Journal. 24:90-102 |
| ISSN: | 1549-7887 1532-0383 |
| DOI: | 10.1080/15320383.2014.914465 |
| Popis: | Heavy metal speciation and the associated ecological risks were investigated, using a European Community Bureau of Reference sequential extraction procedure, in sediments from the residential, mixed (residential and industrial), and agricultural areas of rural rivers in southern Jiangsu Province, China. Compared with the background values in Jiangsu Province soils, Cd was the metal with the highest contamination level, especially in the mixed area, followed by Cu and Zn. In the sediment samples from the agricultural area, the heavy metal concentrations were no more than two times greater than the background values. There were higher proportions of Cd in the acid-soluble fraction, Cr in the residual fraction, and Pb in the reducible fraction in the three areas. The heavy metal mobility was mainly controlled by the acid-soluble and reducible fractions. Cd could pose extremely high risks to the environment. In addition, the risks of heavy metal to the environment in the three areas followed the order: mixed ... |
| Databáze: | OpenAIRE |
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