Author(s)

Sijing Sun^1,2, Chunyu Dong^1,2, Hao Zhang^1,2, Haichan Yang^1,2, Naiming Zhang^1,2, Li Bao^1,2*

¹Yunnan Agricultural University, Kunming, China.
²Yunnan Laboratory of Improvement of Soil Fertility and Pollution Remediation, Kunming, China.

In order to investigate the heavy metal contamination of soil-crop in mining-intensive areas of Gejiu stannary in Yunnan Province and its risk to human health, the single-factor contamination index method and the Nemero comprehensive contamination index method were used to evaluate the contamination risk of heavy metals (Cd and As) in the soil of mining-intensive areas, and the health risk evaluation model was used to study the risk brought by residents through the consumption of maize, wheat and broad beans. The results showed that the mean values of total As and Cd in the soil of the study area were 146 and 2.32 mg·kg^-1, which were 8 and 10.5 times higher than the background values of soil environment in Yunnan Province and belonged to heavy pollution; the enrichment coefficients of As and Cd in maize were 0.1% and 5.7%, in wheat were 0.3% and 11.5%, in fava beans were 0.1% and 4.9%; the soil contamination indices in the four study areas of A, B, C, and D were 7.275, 6.797, 5.618, and 5.060, respectively. The results indicated that the soils in the study areas belonged to heavy contamination levels, and the enrichment ability of Cd in all three crops was stronger than that of As, with wheat being the strongest, As in the three crops and Cd in broad beans might be harmful to children. As in wheat and broad beans may be harmful to adults.

Heavy Metal Pollution, Cadmium, Arsenic, Risk Assessment, Mining Areas

Sun, S. , Dong, C. , Zhang, H. , Yang, H. , Zhang, N. and Bao, L. (2022) Heavy Metal Risk Assessment of Soils and Crops in the Intensive Mining Area of Gejiu, Yunnan Province. Journal of Geoscience and Environment Protection, 10, 128-139. doi: 10.4236/gep.2022.1011008.