Potential toxic heavy metals in village rainwater runoff of antimony mining area, China: Distribution, pollution sources, and risk assessment

• DOI: 10.1016/j.scitotenv.2024.170702
• Publication Date: 2024-02-05T17:20:29Z
• Authors: Luyuan Chen; Bozhi Ren; Xinping Deng; Wei Yin; Qing Xie; Zhaoqi Cai
• Keywords: Rainwater Harvesting

The potential toxic heavy metal runoff from antimony mining areas poses a serious threat to the water environment and health of residents in village. study found that average concentrations As, Sb, Cr, Pb, Cd were 0.1237, 0.1148, 0.0332, 0.0140, 0.0013 mg/L, which higher than normal 0.018, 0.0009, 0.05, 0.012, 0.000013 respectively.Sb As are severely polluted, while Cd, Cr have lower pollution levels. coefficients variation for range 0.079 1.051, with Sb showing exceptionally high variability. Heavy elements accumulate southeastern area village, decreasing southeast northwest. is mainly distributed northeastern part primarily central-western region. Source analysis indicates originate industrial activities, dust deposition, domestic sewage. comes natural geological background product industry, Pb lead-acid batteries, gasoline additives, fertilization residential green pesticide use. Health risk reveals hazard index (HI) values 1.49 2.31, respectively, both exceeding 1, posing village residents. HI all below indicating risks. This identified ore its associated element main leading areas, providing direction subsequent restoration work.