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| Risk assessment of heavy metals in farmland soils around a copper mining area in Anhui Province，China |
| Received:August 09, 2024 |
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| KeyWord:heavy metals;pollution evaluation;spatial distribution;APCS-MLR model |
| Author Name | Affiliation | E-mail | | LIU Chaoqi | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs(MARA)/Tianjin Key Laboratory of AgroEnvironment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | SONG Changzhi | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs(MARA)/Tianjin Key Laboratory of AgroEnvironment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIANG Xuefeng | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs(MARA)/Tianjin Key Laboratory of AgroEnvironment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | PENG Yunying | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs(MARA)/Tianjin Key Laboratory of AgroEnvironment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | yunyingpeng@163.com | | HUANG Qingqing | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs(MARA)/Tianjin Key Laboratory of AgroEnvironment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | SUN Yuebing | Key Laboratory of Original AgroEnvironmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs(MARA)/Tianjin Key Laboratory of AgroEnvironment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | sunyuebing@caas.cn |
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| Abstract: |
| To elucidate investigate the influence of mineral resource exploitation on heavy metal enrichment in surrounding farmland soils, this study investigated the contents and spatial distribution of heavy metals（Cd, Pb, Zn, Cu, Cr, and Ni）in the surface layer （0-20 cm）of farmland soils around the copper mining area in Anhui Province. The levels of heavy metals were evaluated by using single factor index Nemero integrated pollution index, geo-accumulation index, and potential ecological risk index. Source analysis was performed by using Absolute Principal Component Sore-Multiple Linear Regression（APCS-MLR） model. Results showed that the study area predominantly exhibited acidic soil, with Cd, Pb, Zn, Cu, Cr, and Ni contents averaging 0.14-2.74, 3.52-52.90, 6.61-109.78, 1.47- 431.95, 1.16-18.42, and 12.22-59.01 mg·kg-1, respectively. Approximately 96.53% of the tested soil samples exceeded Cd risk screening value and 22.28% exceeded the Cu screening value of Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land（GB 15618—2018）. Cd was identified as slight or medium polluted based on single factor pollution and geo- accumulation indices, while the Nemerow index indicated overall medium pollution dominated by Cd and Cu. Potential ecological risk assessment showed that Cd was the main ecological risk factor in the study area, exhibiting a moderate ecological risk level. APCS-MLR model source analysis indicated that soil Cd were mainly from mining, Cu sources mainly derived from mining and industrial activities, Zn and Pb were mainly from industry sources, and while Cr and Ni were primarily from mining sources. In conclusion, industrial activities in the copper mining area may lead to the risk of Cd pollution in the surrounding farmland. |
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