Heavy metal pollution status in surface sediments of Swan Lake lagoon and Rongcheng Bay in the northern Yellow Sea
| Autor: | Xin-Ming Pu, Bo Wang, Jin-Fen Pan, Lili Huang |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Pollution
China Geologic Sediments Environmental Engineering Health Toxicology and Mutagenesis media_common.quotation_subject Risk Assessment Metals Heavy Environmental Chemistry Extraction (military) media_common Pollutant Sediment Analysis Public Health Environmental and Occupational Health General Medicine General Chemistry Lakes Speciation Oceanography Bays Habitat Environmental science Bay Water Pollutants Chemical |
| Zdroj: | Chemosphere. 93:1957-1964 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2013.06.080 |
| Popis: | The national 'Shandong Peninsula Blue Economic Zone Development Plan' compels the further understanding of the distribution and potential risk of metals pollution in the east coast of China, where the rapid economic and urban development have been taken off and metal pollution has become a noticeable problem. Surface sediments collected from the largest swan habitat in Asia, the Swan Lake lagoon and the surrounding coastal area in Rongcheng Bay in northern Yellow Sea, were analyzed for the total metal concentrations and chemical phase partitioning of five heavy metals (Cu, Zn, Pb, Cd, and Cr). Metal contents in the studied region have increased significantly in the past decade. The speciation analyzed by the sequential extraction showed that Zn and Cr were present dominantly in the residual fraction and thus of low bioavailability, while Cd, Pb and Cu were found mostly in the non-residual fraction thus of high potential availability, indicating significant anthropogenic sources. Among the five metals, Cd is the most outstanding pollutant and presents high risk, and half of the surface sediments in the studied region had a 21% probability of toxicity based on the mean Effect Range-Median Quotient. At some stations with comparable total metal contents, remarkably different non-residual fraction portions were determined, pointing out that site-specific risk assessment integrating speciation is crucial for better management practices of coastal sediments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect