期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 10, 期 1, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.107121
关键词
Superhydrophilic; Polyethersulfone; Polydopamine; Microfiltration; Oily wastewater
This study successfully enhanced the hydrophilicity and anti-fouling properties of PES membrane using modification technology, demonstrating high filtration performance and efficiency in oily wastewater treatment.
Oily wastewater treatment has turned out to be a big menace due to complexity, existence of surfactant/oilincluding water, and growth of originating industries. Superhydrophilic surfaces due to higher water permeability, under-water superoleophobicity, and better fouling resistance than typical hydrophilic membranes are in the center of attention. In the present study, a neat polyethersulfone (PES) membrane was fabricated using nonsolvent induced phase separation - vapor induced phase separation (NIPS-VIPS) processes and then was modified using facile amino-functionalization of SiO2 in the presence of polydopamine (PDA). Symmetric PES membrane hydrophilicity was improved from 44.6 to 11.3o after a surface modification. Permeate flux of the neat NIPS-VIPS and the well-modified membrane were measured as 511 and 1836 L/m2 h bar, respectively. The oil rejection factor was higher than 98% using all tested membranes. Furthermore, irreversible fouling (Rir) was reduced from 18.0% to 2.5% for the neat NIPS-VIPS and well-modified PES membranes, respectively. Considering these attributes, our study can pave the way to fabricate more robust membranes with superior anti-fouling properties to deal with the rising threat of oily water production.
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