用于选择性回收PFAS污染的废水中的聚电解质膜
Su Liu1, Juhee Kim2, Xiaoyue Xin2
1Key Laboratory of Organic Compound Pollution Control Engineering (MOE), School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States.
Water research
|August 27, 2025
概括
一层一层的膜有效地回收营养物质,并在向前透中排斥PFAS. 这种创新方法提高了资源回收和水处理的效率,
科学领域:
- 环境科学
- 材料科学
- 化学工程
背景情况:
- 废水含有有价值的营养物质 (NH4+,PO43−) 和有害的污染物,如和多基物质 (PFAS).
- 传统的治疗方法往往难以同时恢复营养和有效地去除PFAS.
研究的目的:
- 在前方透 (FO) 中评估层次 (LbL) 膜的同时营养回收和PFAS排斥.
- 将LbL膜的性能与用于水处理和资源回收的商业纤维素三酸盐 (CTA) 膜进行比较.
主要方法:
- 通过在多孔基板上交替沉积聚二酸 (PSS) 和聚二甲基化 (PDDA) 来制造LbL膜.
- 使用单溶液和含有营养物质和PFAS的实际AnMBR废水进行前透 (FO) 的性能测试.
- 与商业CTAFO膜的LbL膜性能进行比较.
主要成果:
- 与FO中的CTA膜相比,LbL膜的营养回收率 (4至38倍增加) 和营养/PFAS选择性 (5至95倍增加) 显著提高.
- 在LbL膜孔内扩展电双层 (EDL),改善PFAS排斥和营养/盐透性.
- LbL膜在FO中显示出优异的营养回收和PFAS缓解,但在反透 (RO) 中显示出较低的PFAS排斥,这表明该工艺的特异性有效性.
结论:
- 在向前透中,LbL膜为同时恢复营养物质和减轻PFAS提供了有前途的解决方案.
- 该研究强调了使用LbL膜进行精密分离的潜力,以实现可持续的水处理和资源回收.
- 为了优化水处理策略,需要对过程依赖的膜性能进行进一步研究.
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