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| Risk Assessment and Health Risk Assessment of Soil Heavy Metal Pollution in Chengchao Mining Area |
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Received:July 13, 2022
Revised:July 24, 2022
Accepted:July 29, 2022
Published Online:December 19, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2023.01.009 |
| KeyWord:soil pollution; risk assessment; Chengchao Iron Mine; heavy metal; health risk assessment |
| Author | Institution |
| YANG Yan-hu |
武汉科技大学 |
| FANG Xian-bin |
武汉科技大学 |
| ZHANG Xiao-qin |
武汉科技大学 |
| REN Da-jun |
武汉科技大学 |
| ZHANG Shu-qin |
武汉科技大学 |
| CHEN Wang-sheng |
武汉科技大学 |
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| Abstract: |
| Ecological risks, as well as the human health risks, of heavy metals (cadmium, arsenic, lead, chromium, copper, nickel and zinc) in tailings pond of Chengchao Iron Mine and the surrounding farmland soil were comprehensively evaluated by single factor index, Nemero index, potential ecological risk index and ground accumulation index. The results of single factor risk assessment show that the pollution of As and Cu in tailings pond soil is prominent, and the overstandard rates are 33.3% and 41.7%, respectively. Other heavy metals exceeded the standard at a few points. Only heavy metal Cd exceeds the standard in farmland soil around the mining area. Nemero comprehensive pollution index results show that 16.7% of tailings sites are at moderate pollution level, and 25% of tailings sites are at severe pollution level. Farmland soil is generally cleaner. In tailings soil, 41.7% Cu is at the medium level of potential ecological risk, and 41.7% Cu belongs to the geological accumulation risk of moderate to strong pollution. A few sites have higher levels of potential ecological risk and geological accumulation risk due to the high content of Cd and As. The main heavy metal pollutant in farmland soil is Cd, and the potential ecological risk and geological accumulation risk are moderate in some areas. The results of human health risk assessment show that the non-carcinogenic risk and carcinogenic risk of As and Cr are prominent. Overall, 33.3% of the sites in the tailing area have carcinogenic risk, and all the soil has low non-carcinogenic risk and low risk to human health. Due to the serious heavy metal pollution problems at a few sites, it is still necessary to strengthen the pollution prevention and risk control of heavy metal pollution in the tailings and surrounding farmland soil. |
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