Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 51, Issue 16, Pages 9252-9260Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.7b01795
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Funding
- NSFC [21406117]
- Natural Science Foundation of Jiangsu Province [BK20140782]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- State Key Laboratory of Separation Membranes and Membrane Processes (Tianjin Polytechnic University) [M2-201604]
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A sulfonated thin-film composite (TFC) nanofiltration membrane was fabricated using 2,2'-benzidinedisulfonic acid (BDSA) and trimesoyl chloride (TMC) on a polyether sulfone substrate by conventional interfacial polymerization. Due to a nascent barrier layer with a loose architecture, the obtained TFC-BDSA-0.2 membrane showed an ultrahigh pure water permeability of 48.1 +/- 2.1 L-1 m(-2) h(-1) bar(-1), and a considerably low NaCl retention ability of <1.8% over a concentration range of 10-100 g L-1. The membrane, which possesses a negatively charged surface, displayed an excellent rejection of over 99% toward Congo red (CR) and allowed the fast fractionation of high-salinity textile wastewater. The prepared membrane required only 3-fold water addition to accomplish the separation of multiple components, whereas the commercial NF270 (Dow) membrane required 4-fold water addition and almost double the length of time. Furthermore, the TFC-BDSA-0.2 membrane was subsequently tested for the dye concentration process. It maintained a high flux of 8.2 L-1 m(-2) h(-1) bar(-1) and a negligible dye loss, even when the concentration factor reached similar to 10. Finally, by using a 20% alcohol solution as a back-washing medium, a flux recovery ratio (FRR) of 95.6% was achieved with TFC-BDSA-0.2, and the CR rejection ability remained the same. These results prove the outstanding antifouling and solvent-resistant properties of the membrane.
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