期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 2, 页码 1881-1890出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b03296
关键词
Bioinspired multifunctional coatings; Adsorbent; Nanofiltration; Dye and antibiotics removal; Water remediation
资金
- National Natural Science Foundation of China [21676063, U1462103]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute Technology) [2017DX07]
- HIT Environment and Ecology Innovation Special Funds [HSCJ201619]
- Weihai Major Special Projects [2015ZD08]
- Scientific Research Foundation
Multifunctional coatings derived from bioinspired dopamine (DA) have attracted a lot of attention for water environmental remediation recently. Nevertheless, the high cost of DA monomers seriously hampers their broad application. Herein, an elegant multifunctional coating, which could be deployed as a selective adsorbent or loose nanofiltration membrane for removing of dyes and antibiotics from water, was designed based on the Michael-addition and Schiff-base reactions between cost-effective plant-derived gallic acid (GA) and branched polyethylenimine (PEI) at room temperature. Aside from the extremely low cost of GA (about 5% of that of DA), the resultant GA/PEI coatings possessed much better performance than DA/PEI coatings. When deployed as a dye adsorbent, the bioinspired GA/PEI coatings exhibited much higher selectivity, showing 40% increase in anionic dye adsorptive capability and 30% decline in cationic dye adsorptive capability compared with DA/PEI coatings. When applied as a nanofiltration membrane to separate antibiotic solutions, the multifunctional coatings demonstrated solution flux as high as 41.3 L m(-2) h(-1) at 5 bar alongside 96.2% azithromycin (AH) rejection, showing a 20% increase in flux and 10% increase in rejection compared with DA/PEI nanofiltration membranes. Therefore, our cost-effective multifunctional GA/PEI coatings show promise for use in sustainable water remediation applications.
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