Water Desalination via Pressure-Driven Distillation with Chlorine-Resistant and Large-Area Polymeric Membranes
Water Desalination via Pressure-Driven Distillation with Chlorine-Resistant and Large-Area Polymeric Membranes
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DOI：
10.1021/acs.estlett.3c00391
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发表时间：
2023-07
期刊：
影响因子：
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通讯作者：
D. T. Nguyen;Kian P Lopez;Sangsuk Lee;Jongho Lee;Mark T. Hernandez;Anthony P. Straub
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作者：
D. T. Nguyen;Kian P Lopez;Sangsuk Lee;Jongho Lee;Mark T. Hernandez;Anthony P. Straub
压力驱动蒸馏是一种分离过程，其中液压用于驱动水蒸气穿过空气捕获多孔疏水膜。目前压力驱动蒸馏的发展受到缺乏坚固的大面积膜的限制。在这里，我们报告脱盐使用压力驱动的蒸汽运输通过可扩展的聚合物聚四氟乙烯膜。膜显示压力驱动的水流，在高达10.3巴的液压下几乎完全排斥氯化钠（大于99%）。膜结构，表面化学和脱盐性能被发现是不受剂量的次氯酸钠高达3000 ppm小时。氯气的使用有效地缓解了由于铜绿假单胞菌的生物污损而导致的通量下降。膜在高达60 °C的操作下也表现出高温弹性。总的来说，这项工作展示了大面积聚合物材料在压力驱动蒸馏中的应用，并突出了氯和耐热性的关键优势。
Pressure-driven distillation is a separation process in which hydraulic pressure is used to drive water vapor transport across an air-trapping porous hydrophobic membrane. Current development of pressure-driven distillation is limited by a lack of robust, large-area membranes. Here, we report desalination using pressure-driven vapor transport through scalable polymeric polytetrafluorethylene membranes. The membranes showed pressure-driven water flow with near-complete rejection of sodium chloride (greater than 99%) under hydraulic pressures of up to 10.3 bar. Membrane structure, surface chemistry, and desalination performance were found to be unaffected by doses of sodium hypochlorite up to 3000 ppm h. Flux decline due to biofouling fromPseudomonas aeruginosabacterium was effectively mitigated using chlorine. Membranes also exhibited high temperature resilience with operation up to 60 °C. Overall, this work demonstrates the use of large-area polymeric materials in pressure-driven distillation and highlights key advantages in chlorine and heat tolerance.