污染土壤在现场处理,使用硫化零价值铁激活的硫酸盐
Hyuk Sung Chung1, Daeun Jeon2, Inseong Hwang1
1Department of Civil and Environmental Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.
Chemosphere
|October 6, 2024
概括
一个新的硫化零价值铁 (S-ZVIbm) 系统有效地修复了使用现场土壤混合的污染土壤. 这种方法通过持续的硫酸盐激活来增强污染物的降解,提供了一个有前途的环境清洁解决方案.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 绿色化学 绿色化学
背景情况:
- 土壤中的污染对环境和健康造成重大危害.
- 现场土壤混合是一种可行的污染场地的整治技术.
- 为现场应用开发高效的修复剂至关重要.
研究的目的:
- 开发和评估硫酸盐和硫化零价值铁 (S-ZVIbm) 系统,用于污染土壤的修复.
- 为了优化S-ZVIbm合成和在现场混合土壤的应用条件.
- 研究降解机制和土壤特性对修复过程的影响.
主要方法:
- 使用球磨机工艺合成S-ZVIbm,优化硫与铁的摩尔比率.
- 进行了土壤泥实验,以确定最佳的硫酸盐与S-ZVIbm和硫酸盐与的摩尔比.
- 在现场进行土壤混合模拟试验,以评估系统在各种操作参数下的有效性.
- 利用电子自旋共振和激素清除测试来识别活激素物种.
主要成果:
- 最佳的S-ZVIbm合成在硫与铁的摩尔比率为0.12时实现,防止烧焦风险.
- 在硫酸到S-ZVIbm和硫酸到醇分别为2:1和8:1的摩尔比率下,发生了最佳的醇去除.
- 高含有土壤有机物质的含量通过抑制硫酸盐的激活,对醇的去除产生了负面影响.
- 硫酸盐基是土壤中降解的主要代理物,而硫酸盐和基基在水相中都很重要.
结论:
- 硫酸盐/S-ZVIbm系统是有效的修复污染的土壤通过 in situ 土壤混合.
- 该系统允许可调节的,持续的硫酸盐激活,提高降解效率.
- 了解土壤的特性,如有机物质含量,对于优化补救策略至关重要.
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