The spatial distribution and source of heavy metals in soil-plant-atmosphere system in a large coal mining area

• DOI: 10.1016/j.oreoa.2024.100059
• Publication Date: 2024-07-20T23:35:36Z
• Authors: Hua Tang; Qian Deng; Yufei Yuan; Shipeng Zhang; Yan Luo; Ying Chen; Lan Jiang; Yi Huang
• Keywords: Soil test

Due to the lack coupling analysis of heavy metals in soil-plant-atmosphere system, migration and transformation remains unclear. In this study, 240 surface (0–20 cm) soil samples, 365 plant samples 168 atmospheric dust were collected a large coal mining area, which selected arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), plumbum (Pb), zinc (Zn) analyzed, elucidate spatial distribution source their bioavailability. According results ArcGIS mapping analysis, patterns Cd, Cu, Pb, Zn three media are similar, while characteristics Cr Ni highly consistent. The factors contributing these could be associated with human activities elements. Compared background value, Zn, Cr, Pb soil, Cu plants apparently accumulated. geological accumulation pollution index (Igeo) shows that there exist mild moderate levels Cd air. evaluation potential risks showed ecological hazards strong dust. sources assessed using principal component (PCA), land use type, analysis. Anthropogenic main metal content. Coal-related industrial processes related coal, sewage irrigation, agricultural chemicals, vehicle emissions may anthropogenic metals.