在土壤中竞争性运输重金属:动态与数值建模
Yiren Li1, Jiawen Zhang2, Yuke Lv2
1State Key Laboratory of Soil Pollution Control and Safety, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Engineering Technology Center for Pollution Prevention and Control of Taizhou, Taizhou University, Jiaojiang, Zhejiang Province 318000, China; Department of Environmental Systems Science, ETH Zürich, Zurich 8092, Switzerland.
Journal of hazardous materials
|June 15, 2025
概括
(Pb) 显著加快了土壤中的 (Cd) 运输,减少了突破时间,增加了地下水污染风险. 这突出了土壤环境中复合重金属的复杂相互作用.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 地质化学 地质化学
背景情况:
- 复合重金属污染对地下水和深层土壤构成重大风险.
- 了解土壤中的金属运输对于风险评估和修复至关重要.
研究的目的:
- 在单一和复合污染场景中模拟和分析 (Cd) 运输.
- 研究 (Pb) 对土壤形状中的Cd流动性的影响.
- 验证HYDRUS模型对重金属运输的预测能力.
主要方法:
- 进行了土壤透和浸出测试.
- 使用HYDRUS和CXTFIT模型进行模拟和分析.
- 纳入了HYDRUS模型中的竞争性吸附异温和重金属物种化.
主要成果:
- (Pb) 显著促进了Cd运输,将初始突破时间从12到5个孔积 (PV) 缩短.
- Pb的存在使孔水中的Cd度增加了70.2%,从而提高了运输潜力.
- 通过吸附异温和物种化增强的HYDRUS模型实现了高预测精度 (R2 = 0.84).
结论:
- 提高了的流动性,增加了地下水污染的风险.
- 经过验证的HYDRUS模型提供了一个可靠的工具,用于预测污染场所的长期重金属运输.
- 了解竞争性吸附是准确重金属运输建模的关键.
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