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通过向前透处理污染的废水处理:性能分析

Yahia Aedan¹, Ali Altaee¹, John L Zhou¹

¹Centre for Green Technology, School of Civil and Environmental Engineering, the University of Technology Sydney, 15 Broadway, NSW 2007, Australia.

The Science of the total environment

|May 22, 2024

概括

纤维素三酸盐前透膜有效地去除高酸 (PFOA),达到99%的排斥率. 抽取溶液成分,特别是MgCl2和中性/酸性pH值对于最佳的PFOA从污染水中去除至关重要.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

perfluorooctanoic 酸 (PFOA) 是一种持久性环境污染物,对健康和生态产生不利影响.
传统的压力驱动膜技术来去除PFAS是昂贵的,容易受到污染.
向前透 (FO) 为处理PFAS污染水提供了一个潜在的替代方案.

研究的目的:

为了研究纤维素三酸盐 (CTA) 膜在前方透 (FO) 系统中去除PFOA的参数性能.
评估操作参数的影响,如膜方向,料pH值,抽取溶液和PFOA度对PFOA去除效率的影响.
评估CTA FO膜的污染和清洁特性.

主要方法:

在FO配置中的CTA膜的参数研究.
各种参数包括膜方向,料pH值 (酸性,中性,性),抽液成分 (MgCl2,NaCl,海水) 和度,以及初始的PFOA度 (5-100 mg/L).
分析了PFOA排斥,水流和膜孔大小;处理后评估了清洁效率.

主要成果:

通过MgCl2抽取溶液达到99%的PFOA排斥,通过NaCl达到>98%,归因于Mg2+离子结合.
在中性和酸性pH值下观察到高PFOA排斥 (99%),在pH值9下由于孔隙胀,排斥降至95%.
PFOA度 (5-100 mg/L) 和海水作为吸水溶液并没有显著影响排斥 (99%).
经过DI水和奥斯莫斯反冲洗的清洗后,证明了90%的回收率和96.5%的水流回收率,这表明污染很低.

结论:

在各种条件下,CTA FO膜显示出高效率和稳定性,用于在各种条件下去除PFOA.
抽取溶液的成分和pH值是影响PFOA去除有效性的关键因素.
该过程是稳固的,具有成本效益,适合处理污染的废水,最小的污染.

关键词:

画出一个解决方案.前向透技术的前向透技术膜膜是一种膜.在PFAS中,我们可以使用PFAS.perfluorooctanoic 酸的含量是多少

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