期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 156, 期 -, 页码 754-765出版社
ELSEVIER
DOI: 10.1016/j.seppur.2015.10.073
关键词
Biomimetic; Aquaporin; Nanofiltration; Water purification
资金
- NSF [1308095]
- USGS 104(b): Ohio Water Development Authority [GRT00028988/60040357]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1308095] Funding Source: National Science Foundation
- Office of Integrative Activities
- Office Of The Director [1355438] Funding Source: National Science Foundation
Aquaporin, a highly selective water channel protein, has received worldwide attention because of its potential to form biomimetic membranes with high flux and rejection for water reuse and desalination. In this study, purified aquaporins were incorporated into the active layer of the polybenzimidazole (PBI) nanofiltration membrane. Aquaporins were dispersed in gum arabic and embedded in amphiphilic polyvinyl alcohol with alkyl side chains (PVA-alkyl). PVA-alkyl embedded with treated aquaporins was then attached to flat sheet PBI membranes using carbodiimide chemistry. PVA-alkyl acted as support for aquaporins to prevent their chemical alteration and also gave the membranes mechanical strength. It was found that membranes modified with PVA-alkyl-AqpZ displayed lower flux declines and higher flux recoveries as compared to unmodified PBI membranes. Higher protein and salt rejections were also observed using PVA-alkyl-AqpZ modified membranes as compared to unmodified PBI membranes. (C) 2015 Elsevier B.V. All rights reserved.
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