期刊
CARBOHYDRATE POLYMERS
卷 247, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.116693
关键词
Chitosan; Metal-organic frameworks; Membrane adsorbent; Optimization
Nanobiocomposite adsorptive membranes were engineered by integrating metal-organic frameworks (ZIF-8), into the chitosan/poly(vinyl alcohol) blend and coating the blend on PVDF membrane support for an enhanced separation performance. The membranes were characterized by SEM, AFM, BET, XRD, ATR-FTIR and tensile stress analyses. The central composite design was utilized to optimize the water flux and dye rejection. Using CCD, the effect of the membrane thickness, PEG (pore-former), and chitosan content on the flux and rejection were studied. The optimal conditions were obtained as; 10 wt% PEG, 3 wt% chitosan, and 200 mu m membrane thickness. The optimized flux and rejection were obtained 78.94 L m(-2) h(-1) and 90.3 %, respectively. The antifouling of the membranes was also examined by the filtration of BSA protein solution. The membranes showed comparable performance; however, extremely higher permeability (78.94 L m(-2) h(-1) bar(-1)) compared to similar TFC membranes that guarantee the economic favorability of the filtration process.
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