Risk analysis of heavy metal concentration in surface waters across the rural-urban interface of the Wen-Rui Tang River, China
| Autor: | Kun Mei, Hong Huang, Yuan Yuan Liu, Randy A. Dahlgren, Minghua Zhang, Fang Xia, Liyin Qu |
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| Rok vydání: | 2018 |
| Předmět: |
Risk analysis
China 010504 meteorology & atmospheric sciences Environmental remediation Health Toxicology and Mutagenesis 010501 environmental sciences Toxicology Urban area Risk Assessment 01 natural sciences Arsenic Rivers Environmental protection Metals Heavy Humans Water pollution 0105 earth and related environmental sciences geography geography.geographical_feature_category Ecology Heavy metals Mercury General Medicine Pollution Wastewater Environmental science Environmental Pollution Risk assessment Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Pollution. 237:639-649 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2018.02.020 |
| Popis: | Heavy metal pollution is a major concern in China because of its serious effects on human health. To assess potential human health and ecological risks of heavy metal pollution, concentration data for seven heavy metals (As, Pb, Cd, Cr, Hg, Cu, Zn) from 14 sites spanning the rural-urban interface of the Wen-Rui Tang River watershed in southeast China were collected from 2000 to 2010. The heavy metal pollution index (HPI), hazard index (HI) and carcinogenic risk (CR) metrics were used to assess potential heavy metal risks. Further, we evaluated the uncertainty associated with the risk assessment indices using Monte Carlo analysis. Results indicated that all HPI values were lower than the critical level of 100 suggesting that heavy metal levels posed acceptable ecological risks; however, one site having an industrial point-source input reached levels of 80-97 on several occasions. Heavy metal concentrations fluctuated over time, and the decrease after 2007 is due to increased wastewater collection. The HI suggested low non-carcinogenic risk throughout the study period (HI 10-4). While most metrics for human health risk did not exceed critical values for heavy metals, there is still a potential human health risk from chronic exposure to low heavy metal concentrations due to long-term exposure and potential metal interactions. Results of this study inform water pollution remediation and management efforts designed to protect public health in polluted urban area waterways common in rapidly developing regions. |
| Databáze: | OpenAIRE |
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