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研究砂土和粘土土的石运输特性
Lélia Cristina da Rocha Soares1, Gabriela Paupitz Mendes2, Rayanne Macêdo Aranha Viegas3
1Department of Chemical Engineering, University of Sao Paulo, São Paulo, SP, 05508-000, Brazil. lelia.cr.soares@gmail.com.
Environmental monitoring and assessment
|July 18, 2023
概括
这项研究调查了巴西土壤中的酸盐污染. 结果显示,土在粘土土壤中的流动性高于预期,影响了地下水风险评估.
科学领域:
- 环境科学 环境科学
- 地质地质地质地质地质地
- 土壤科学 土壤科学
背景情况:
- 酸盐是一种有毒的有机污染物和密集的非水相液体 (DNAPL),对环境构成重大风险.
- 了解地下多孔介质中的DNAPL迁移对于有效的补救策略至关重要.
- 诸如残留和和液压导电性等关键参数控制多相流和污染物运输.
研究的目的:
- 为了评估酸盐在沙土和粘土土壤中的行为和保留.
- 为了比较克石的液压导电性与不同类型的土壤中的水.
- 为准确建模藻迁移和地下水污染风险提供必要的数据.
主要方法:
- 从巴西圣保罗一个受污染的地点收集了沙土和粘土土样本.
- 使用van Genuchten和Brooks和Corey模型评估了酸盐保留曲线.
- 在两种土壤类型中测量和比较了石和水的液压导电性.
主要成果:
- 在沙性土壤中,酸盐的保留率更高,而在粘土土壤中,水的保留率更高.
- 观测到液压导电性的显著差异;粘土土在石和水之间显示出两次数的差异.
- 尽管有粘度,但石在粘土土壤中表现出相当大的流动性,这是修复的关键发现.
结论:
- 克里奥索特的地下行为在沙土和粘土土壤之间有很大差异.
- 这项研究提供了关于这些特定多孔介质中酸盐参数的新数据.
- 这些发现提高了污染物运输的预测,有助于DNAPL泄漏的风险管理和补救计划.
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