Randomized trial assesses road dust contamination and indoor radon risk in schools, highlighting air-quality concerns.
Key Points
This study aims to characterize road dust and assess indoor radon concentrations in public schools, focusing on children's exposure risks.
Collected road dust samples from 17 public schools and analyzed for physicochemical properties, mineralogy, and contamination indices.
Conducted bioaccessibility tests on potentially toxic elements and measured indoor radon concentrations in classrooms, with an average of 1540 ± 921 Bq/m³.
Identified Zn as the main pollutant in road dust with a maximum pollution index of 11.6, indicating slightly polluted conditions.
Found moderate to high bioaccessibility for Ni, Cu, and Pb, suggesting increased risk despite moderate concentrations.
Measured elevated indoor radon levels in classrooms with potential inhalation cancer risks.