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| Heavy metals enrichment and health risk assessment of cultivated soil-crops in mountainous coal mining areas of southwest Chinans |
| Received:April 14, 2021 Revised:April 26, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.2095-1035.2021.05.004 |
| KeyWord:Coal mining area; Heavy metals; Soil pollution; Crops; Health risk |
| Author | Institution |
| LI Wujiang |
贵州民族大学生态环境工程学院 |
| ZHU Sixi |
贵州民族大学生态环境工程学院 |
| Wang Zhong |
国家海洋局秦皇岛海洋环境监测中心站 |
| ZHAO Bin |
贵州民族大学人文科技学院 |
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| Abstract: |
| To understand the accumulation of heavy metals in soils and crops around a typical mountainous coal mine area in southwest China and its influence on the health of local population.Soil samples and corresponding crop samples were collected around the mining area, and the contents of Cr, Mn, Zn, As and Pb were determined. Nemero comprehensive pollution index and potential ecological risk index were used to evaluate the pollution degree of soil.Health risk assessment of heavy metal enrichment in crops was carried out by using target hazard quotient methods.The results showed that the contents of the five heavy metal elements measured were all higher than the background value of heavy metal elements in the soil of Guizhou, Cr, Mn, Zn, As and Pb were 1.81, 1.90, 2.89, 1.30 and 0.86 times of the background value respectively. The heavy metal elements in the soil were at the level of slight pollution with mild harm.In crops, the content of heavy metals Cr, Pb and As exceeds the standard, while Zn exceeds is relatively light. The evaluation results of heavy metals in crops show that the health risks of heavy metals enriched by various crops are in turn. As follows: sorghum > corn > cabbage > onion > pepper. Among the impacts of crops on adults, sorghum is at the level of chronic poisoning, while other crops are at the level of have a great impact on health.The heavy metals of all crops are at the level of chronic poisoning for children.The correlation analysis between heavy metals in crops and soil shows that the content of heavy metals in crops is not related to the total amount of heavy metals in soil.The transfer ability of heavy metals in crops is different, Pb and As have a large transfer capacity in crops, while Cr is relatively weak.For this situation of the accumulation of heavy metals in the mining area, remedial measures should be taken as soon as possible.For the sake of ensure the health of the local population, suggested that local residents no longer eat and plant sorghum and corn which are seriously enriched with heavy metals. |
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