Persistent thallium contamination in river sediments, source apportionment and environmental implications
| Autor: | Jingye She, Yuchen Zhou, Jin Wang, Daniel C.W. Tsang, Diyun Chen, Meiling Yin, Zirong Chen, Yuting Zhou, Juan Liu, Nuo Li |
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| Rok vydání: | 2020 |
| Předmět: |
China
Geologic Sediments Environmental remediation Health Toxicology and Mutagenesis Iron chemistry.chemical_element engineering.material Sulfides Mining Isotopes Rivers Metals Heavy Cities Thallium Contamination control Extraction (chemistry) Public Health Environmental and Occupational Health General Medicine Contamination Pollution Southern china chemistry Environmental chemistry engineering Environmental science Pyrite Environmental Pollution Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Ecotoxicology and environmental safety. 202 |
| ISSN: | 1090-2414 |
| Popis: | The adverse impacts of detrimental thallium (Tl) contamination are of increasing concerns to sustainable development. Herein, the contents, distributions and sources of Tl and potential toxic elements (PTEs) (Pb, As, Cr, Cu, Ni, Co, Sb, Cd and U) were investigated in sediments collected in Gaofeng River, which has been contaminated by long-term mining activities, located in Yunfu City, Southern China. Results indicated that excessive Tl levels were found in sediments (1.80–16.70 mg/kg). Sequential extraction procedure indicated that despite a large amount of Tl entrapped in residual fraction, a significant level of Tl (0.28–2.34 mg/kg) still exhibited in geochemically labile fractions, which was easy for Tl mobilization and availability. Pb isotope tracing method further confirmed that the pyrite exploitations may be the prime contaminated contributor (47–76%) to these sediments. These findings highlight that it is essential to establish more effective measures for Tl contamination control and call for engineered remediation countermeasures towards polluted river sediments. |
| Databáze: | OpenAIRE |
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