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Effect of different inorganic draw solutes on SiNPs-TFN membrane for forward osmosis desalination
International Journal of Environmental Science and Technology ( IF 3.1 ) Pub Date : 2021-01-04 , DOI: 10.1007/s13762-020-03083-3
J. M. Tharayil , A. Manaf

Forward osmosis (FO) is the most promising upcoming desalination technique which requires more detailed researches to reduce its challenges like low pure water flux and high reverse solute flux. This paper represents the fabrication of thin-film nanocomposite polyethersulfone membrane with 0.005 wt% of silica nanoparticle (SiNPs) loading and analysis of FO performance of the fabricated TFN membrane. The nanoparticle was incorporated into the polyamide active rejection layer by interfacial polymerization. Membrane characterizations like ATR-FTIR, SEM, and wettability analysis were done. Successful nanoparticle incorporation was confirmed by ATR-FTIR analysis. Rise in hydrophilicity of TFN membrane was confirmed surface wettability measurements. The effect on draw solution concentration as well as cross-flow rate on membrane performance was analyzed. Comparison of forward osmosis performance with various inorganic draw solutes was also tested. The draw solutes considered were KCl, NaCl, and CaCl2 due to its various applications in fertigation and desalination. The filtration parameters of the fabricated membranes are analyzed and enlisted. The membrane FO performance under AL-FS and AL-DS modes of operation was tested. Results show that fabricated TFN membrane obtains a maximum flux of 23.93LMH in AL-DS mode, and salt rejection was 91%.



中文翻译:

不同无机溶质对SiNPs-TFN膜进行正向渗透淡化的影响

正向渗透(FO)是即将到来的最有希望的海水淡化技术,需要进行更详细的研究以减少其挑战,例如低纯水通量和高反向溶质通量。本文介绍了具有0.005 wt%二氧化硅纳米颗粒(SiNPs)负载量的薄膜纳米复合聚醚砜膜的制备以及制备的TFN膜的FO性能分析。通过界面聚合将纳米颗粒结合到聚酰胺活性排斥层中。进行了膜表征,如ATR-FTIR,SEM和润湿性分析。通过ATR-FTIR分析证实了成功的纳米颗粒掺入。TFN膜亲水性的提高证实了表面润湿性测量。分析了对汲取溶液浓度以及错流速率对膜性能的影响。还测试了正渗透与各种无机吸引溶质的比较。考虑的牵引溶质为KCl,NaCl和CaCl2由于其在施肥和脱盐中的各种应用。分析并征集了制成的膜的过滤参数。测试了在AL-FS和AL-DS操作模式下的膜FO性能。结果表明,制备的TFN膜在AL-DS模式下可获得23.93LMH的最大通量,脱盐率为91%。

更新日期:2021-01-05
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