| Issue |
E3S Web of Conf.
Volume 393, 2023
2023 5th International Conference on Environmental Prevention and Pollution Control Technologies (EPPCT 2023)
|
|
|---|---|---|
| Article Number | 01042 | |
| Number of page(s) | 5 | |
| Section | Environmental Assessment and Urban and Rural Resource Planning | |
| DOI | https://doi.org/10.1051/e3sconf/202339301042 | |
| Published online | 02 June 2023 | |
Leaching characteristics and potential risk assessment of heavy metals Pb-Cd from mining soils in an acid rain environment
1 College of Agriculture and Biological Sciences, Dali University, Dali 671003, Yunnan, China
2 Key Laboratory of Ecological Microbial Remediation Technology of Yunnan Higher Education Institutes
To investigate the pollution characteristics of Pb and Cd in mining soil, dynamic leaching tests was conducted to explore the leaching characteristics. Pollution was evaluated using the Risk Index (RI) and Assessment Code (RAC). The results showed that under simulated acid rain, the soil had a certain buffer capacity, the pH value of leaching solution varied between 5.0 and 8.5. Heavy metals release also varied, with the highest amount of Pb dissolved being 2.27 mgꞏL-1, while that of Cd was relatively low, the highest is 0.93 mgꞏL−1. Moreover, heavy metals with larger particle sizes showed a greater propensity for dissolution when subjected to acid rain. BCR extraction revealed that the initial heavy metal status was mostly residual. After leaching, heavy metal morphology changed drastically, with the residual state of reducing significantly. RAC and RI indicated a moderate risk of Pb and Cd pollution under different treatment conditions.
© The Authors, published by EDP Sciences, 2023
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