防污导电正渗透膜：电化学和化学性质,ACS Applied Energy Materials

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防污导电正渗透膜：电化学和化学性质
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-04-16 00:00:00 , DOI: 10.1021/acsapm.9b00087
Perla Cruz-Tato ₁ , Nicole Rivera-Fuentes ₁ , Michael Flynn ₂ , Eduardo Nicolau ₁

Affiliation

在膜工艺中，正渗透（FO）的出现和引起人们的关注，因为它可以实现高水通量，同时将能耗降至最低，从而使其成为一种经济高效的废水处理方法。然而，膜结垢仍然是该应用的障碍。为了解决这个问题，我们制造了一种由聚砜和聚苯胺（PAni）组成的导电膜。这些膜具有氧化目标有机化合物和/或静电去除结垢层的潜力。在优化PAni负载后，我们使用藻酸钠作为模型污垢剂进行了实验室规模的测试。膜被污染，导致FO效率降低72％。将污垢的膜用阴极电位处理30分钟，用扫描电镜（SEM）监测结垢和防污过程，并采用接触角和电化学方法。结垢的膜表现出堵塞的表面和高电阻，而处理过的膜则恢复了PAni纳米纤维的形态，其电和亲水性能以及FO效率的84％。因此，PAni可以提高总的膜渗透性，同时具有防污性能。此外，本研究的EIS结果阐明了在FO模式下结垢前后控制水分离过程的机理。其电和亲水性能以及FO效率的84％。因此，PAni可以提高总的膜渗透性，同时具有防污性能。此外，本研究的EIS结果阐明了在FO模式下结垢前后控制水分离过程的机理。其电和亲水性能，以及其FO效率的84％。因此，PAni可以提高总的膜渗透性，同时具有防污性能。此外，本研究的EIS结果阐明了在FO模式下结垢前后控制水分离过程的机理。

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Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Forward osmosis (FO) has been emerging and gaining attention within the membrane-based processes because it can achieve high water fluxes while minimizing energy consumption, making it a cost-effective approach for wastewater treatment. However, membrane fouling remains an obstacle to this application. To address this concern, we fabricated an electroconductive membrane composed of polysulfone and polyaniline (PAni). These membranes have the potential to oxidize targeted organic compounds and/or electrostatically remove the fouling layer. After optimizing the PAni loading, we performed bench-scale tests using sodium alginate as model foulant. The membranes were fouled resulting in a decrease in FO efficiency of 72%. Fouled membranes were treated with a cathodic potential for 30 min, the fouling and antifouling processes were monitored with scanning electron microscopy (SEM), and contact angle and electrochemical methods were used. The fouled membrane exhibited a clogged surface and high electrical resistance, while the treated membrane recovered the PAni nanofibers morphology, its electrical and hydrophilic properties, and 84% of its FO efficiency. Thus, PAni can improve the overall membrane permeability while incorporating antifouling properties. Moreover, the EIS results of this study shed light on the mechanisms that govern the water separation process before and after fouling in the FO mode.

更新日期：2019-04-16

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