Research Article
Potentially Toxic Elements and Health Risk Assessment in Farmland Systems around High-Concentrated Arsenic Coal Mining in Xingren, China
Figure 5
Concentrations of Cr, Pb, Cu, and As (mg·kg−1) for the nail (a), hair (b), and blood (c) samples across different age groups (15–30, 31–50, >50 years).
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| (b) |
| (c) |