淡江大學機構典藏:Item 987654321/103384
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    题名: Exploring an innovative surfactant and phosphate-based draw solution for forward osmosis desalination
    作者: Hau Thi Nguyen;Chen, Shiao-Shing;Nguyen Cong Nguyen;Huu Hao Ngo;Wenshan Guo;Li, Chi-Wang
    贡献者: 淡江大學水資源及環境工程學系
    关键词: Forward osmosis;Seawater desalination;Hydrophobic interaction;Surfactant
    日期: 2015-09
    上传时间: 2015-07-06 15:08:18 (UTC+8)
    出版者: Elsevier BV
    摘要: The reverse salt flux phenomenon of forward osmosis affects the quality of the feed water, reduces water flux, and increases the cost for replenishing lost draw solute. In this study, a novel draw solution comprising a mixture of Triton X100 and Na3PO4 for minimizing the reverse salt flux during forward osmosis (FO) was explored. The results indicated that the reverse salt flux caused by coupling 0.5 mM Triton X100 to 0.55 M Na3PO4 draw solution was only 0.13 g/m2 h, and the specific reverse salt flux was 0.03 g/L using DI water as the feed solution, which are the lowest recorded values among all forward osmosis studies. Hydrophobic attractive interactions between tail groups of Triton X100 with the FO membrane are believed to be the main mechanism for minimizing salt leakage. Results from desalination experiments demonstrated that using 0.55 M Na3PO4 coupled with 0.5 mM Triton X100 as the draw solution and brackish water and seawater as the feed solution with total dissolved solids of 4090 and 36,800 ppm achieved water fluxes of 4.89 L/m2 h and 1.15 L/m2 h, respectively. Furthermore, using a two-stage ultrafiltration–nanofiltration system for the draw solution recovery enabled 98% recovery of solutes.
    關聯: Journal of Membrane Science 489, p.212–219
    DOI: 10.1016/j.memsci.2015.03.085
    显示于类别:[水資源及環境工程學系暨研究所] 期刊論文

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