化挥发性有机化合物 (CVOC) 和1,4-二氧化动力学和平衡吸附研究对选择性宏观环形吸附剂进行了研究
Elham Abaie1, Manish Kumar1, Uriel Garza-Rubalcava2
1Department of Civil, Environmental and Construction Engineering, Texas Tech University, Lubbock, TX 79409, United States.
Environmental advances
|August 9, 2024
概括
新的宏环吸附剂Res-TFN和β-CD-TFN可以从1,4-二氧化中选择性地去除化挥发性有机化合物 (CVOC). Res-TFN具有很高的容量和选择性,为这些污染物提供了单独的生物降解途径.
科学领域:
- 环境化学环境化学
- 吸附科学 吸附科学
- 修复水资源的修复方法
背景情况:
- 化挥发性有机化合物 (CVOC) 和1,4-二氧化在受污染的水中共存.
- 单独的生物降解途径 (CVOCs的无氧,1,4-二氧化的有氧) 需要选择性去除.
- 像活性炭这样的传统吸附剂对这些化合物缺乏选择性.
研究的目的:
- 评估宏环吸附剂 (β-CD-TFN和Res-TFN) 在有1,4-二氧化的情况下进行选择性CVOC吸附.
- 将这些新材料的吸附性能与活性炭进行比较.
主要方法:
- 合成和表征β-CD-TFN和Res-TFN宏环吸收剂.
- 批量吸附实验用于测量CVOC和1,4-二氧化的吸附能力和选择性.
- 吸附数据与传统活性炭的比较.
主要成果:
- 无论是β-CD-TFN还是Res-TFN,都表现出快速的CVOC吸附与最小的1,4-二氧化吸收.
- 与β-CD-TFN相比,Res-TFN的CVOC吸附能力显著更高 (Kd 2140-9750 L·kg-1) 和β-CD-TFN (Kd 192-918 L·kg-1) 相比.
- Res-TFN对CVOC具有高选择性,超过1,4-二氧化 (TCE Kd ~117 Kd对于1,4-二氧化),表现优于活性炭.
结论:
- Res-TFN是一种高度选择性和有效的吸附剂,用于将CVOC从1,4-二氧化分离出来.
- 这种选择性分离可以为每个污染物实施不同的生物降解策略.
- 宏环吸附剂为复杂的水资源整治挑战提供了一个有希望的解决方案.
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