使用商业可用的吸附剂去除和多基基物质
Zhiming Zhang1, Sevda Joudiazar2, Anshuman Satpathy2
1Department of Civil and Environmental Engineering, Rowan University, Glassboro, NJ 08028, USA.
Materials (Basel, Switzerland)
|March 27, 2025
概括
有机粘土和改性有机粘土有效地从水中去除和多基物质 (PFAS),性能优于颗粒活性炭. 这些吸附剂具有很高的吸附能力和很大程度上不可逆转的吸附,提供有前途的整治解决方案.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 材料科学 材料科学 材料科学
背景情况:
- 和多醇基物质 (PFAS) 是持久性有机污染物,具有广泛的环境检测.
- 人们越来越担心PFAS污染对环境和人类健康的影响.
- 有效的补救策略对于减轻PFAS污染至关重要.
研究的目的:
- 为了比较颗粒活性炭 (GAC) 和各种有机粘土吸附剂在从水中去除PFAS的有效性.
- 评估不同吸附剂材料对关键PFAS化合物的吸附能力和动力学.
- 评估PFAS吸附在选定的商业吸附剂上的可逆性.
主要方法:
- 吸附剂材料的特征:颗粒状活性炭 (GAC),有机粘土 (OC-200) 和改性有机粘土 (Fluoro-sorb-100,Fluoro-sorb-200).
- 批量吸附实验以确定PFOA,PFNA和PFOS的去除效率和吸附能力.
- 动力建模使用伪二阶模型来描述吸附率.
- 溶解研究,以评估PFAS吸附的可逆性.
主要成果:
- 与GAC相比,有机粘土和改性有机粘土在PFAS去除方面表现优越,与GAC相比,在PFAS去除方面表现优越.
- 伪二阶动力学准确地描述了PFOA,PFNA和PFOS的快速吸附.
- 对OC-200 (PFOA为47.17μg/g) 和Fluoro-sorb-100 (PFNA为99.01μg/g,PFOS为65.79μg/g) 观察到的吸附能力最高.
- 脱实验表明,PFAS对测试材料的吸附在很大程度上是不可逆转的.
结论:
- 改性有机粘土是高效的吸附剂,可以从水中去除PFOA,PFNA和PFOS.
- 选择合适的吸附剂材料对于有效的PFAS整治至关重要.
- 吸附的不可逆转性质表明使用这些有机粘土材料去除PFAS的长期稳定性.
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