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Double-skinned forward osmosis membranes based on layer-by-layer assembly—FO performance and fouling behavior

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Double-skinned forward osmosis membranes based on layer-by-layer assembly—FO performance and fouling behavior
นักวิจัย : Qi, Saren , Qiu, Changquan , Zhao, Yang , Tang, Chuyang Y.
คำค้น : DRNTU::Engineering::Environmental engineering. , DRNTU::Engineering::Civil engineering.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : Qi, S., Qiu, C. Q., Zhao, Y., & Tang, C. Y. (2012). Double-skinned forward osmosis membranes based on layer-by-layer assembly—FO performance and fouling behavior. Journal of membrane science, 405-406, 20-29. , http://hdl.handle.net/10220/13624 , http://dx.doi.org/10.1016/j.memsci.2012.02.032
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of membrane science
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Novel crosslinked layer-by-layer (xLbL) forward osmosis (FO) membranes with a double-skinned design have been synthesized and characterized in the present work. Cross flow reverse osmosis test results showed that the membrane top skin generally had higher hydraulic resistance and better solute rejection compared to the bottom skin even when the same number of polyelectrolyte layers were deposited. The overall water permeability of the double-skinned FO membrane can be estimated from the respective values of the top and bottom skins using a resistance-in-series model. For FO tests performed at high feed solution (FS) concentration (0.5 M MgCl2), the water flux was not affected by the membrane separation properties nor its orientation. However, much higher FO water flux was obtained in the top-skin-facing-the-draw-solution (Top-DS) orientation compared to the alternative Top-FS orientation when the FS concentration was low. Using DI water as FS and 0.5 M MgCl2 as DS, FO water fluxes ranged from 40 to 80 L/m2 h in Top-DS and ∼30 L/m2 h in Top-FS. Higher DS concentrations resulted in greater FO water fluxes (e.g., 50–110 L/m2 h at 2 M MgCl2 DS). Fouling tests demonstrated that the double-skinned membrane had much better resistance against FO fouling in the Top-DS orientation. To the best knowledge of the authors, this is the first systematic study on the synthesis and characterization of double-skinned xLbL membranes. In addition, their superior anti-fouling ability was experimentally demonstrated for the first time.

บรรณานุกรม :
Qi, Saren , Qiu, Changquan , Zhao, Yang , Tang, Chuyang Y. . (2555). Double-skinned forward osmosis membranes based on layer-by-layer assembly—FO performance and fouling behavior.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Qi, Saren , Qiu, Changquan , Zhao, Yang , Tang, Chuyang Y. . 2555. "Double-skinned forward osmosis membranes based on layer-by-layer assembly—FO performance and fouling behavior".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Qi, Saren , Qiu, Changquan , Zhao, Yang , Tang, Chuyang Y. . "Double-skinned forward osmosis membranes based on layer-by-layer assembly—FO performance and fouling behavior."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2555. Print.
Qi, Saren , Qiu, Changquan , Zhao, Yang , Tang, Chuyang Y. . Double-skinned forward osmosis membranes based on layer-by-layer assembly—FO performance and fouling behavior. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2555.