胺基粘土聚合物复合物作为土壤修饰剂,用于稳定受污染的土壤中短链和长链的每基和多基物质
Rahim Shahrokhi1, Aneesu Rahman1, Martin A Hubbe2
1Department of Civil and Environmental Engineering, Seoul National University, Seoul, South Korea.
Journal of hazardous materials
|May 7, 2024
概括
一种新型的粘土聚合物复合物有效地固定了土壤中的per-和poly-fluoroalkyl物质 (PFAS). 这种创新型的土壤修补剂显著减少了PFAS的漏,并提高了土壤的强度,为环境修复提供了一个有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 土壤科学 土壤科学
背景情况:
- 污染了和多基物质 (PFAS) 的土壤对环境和人类健康构成风险.
- 有效的补救策略对于管理PFAS污染至关重要.
研究的目的:
- 开发和表征一种新型的粘土聚合物复合物,作为PFAS固定化的土壤修饰剂.
- 评估开发材料在减少PFAS漏和改善土壤特性方面的效率.
主要方法:
- 一种聚乙烯胺 (PEI) 溶液应用于蒙特莫里隆尼特粘土-奇托桑聚合物复合物,以创建PEI修饰的蒙特莫里隆尼特奇托桑珠 (MMTCBs).
- 确定了MMTCB对各种PFAS的吸附能力.
- 在用MMTCB和颗粒活性炭 (GAC) 修改的土壤上进行了柱子漏试验.
- 在修改后评估了土壤的机械性能,特别是剪切强度.
主要成果:
- 在MMTCB中,PFBA,PFBS,PFOA和PFOS的吸附能力高,超过了GAC的吸附能力.
- 用10%的MMTCB修改土壤显著降低了PFOA (90%),PFOS (100%),PFBA (64%) 和PFBS (68%) 的浸出.
- MMTCBs增强了土壤剪切强度,与减少土壤剪切强度的GAC不同.
结论:
- 经PEI修改的蒙特莫里隆尼特奇托桑珠是有效的土壤修改剂,用于固定PFAS污染物.
- MMTCBs提供优越或可比的PFAS固定,同时改善土壤的结构完整性和机械性能.
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