期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 402, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.hazmat.2020.123766
关键词
Fenton-like oxidation; Multicomponent wastewater; Selective removal; Sequential interception-oxidation; Dual-layer membrane; Bisphenol S
资金
- National Key Research and Development Program of China [2017YFE0107200]
- Nanjing University Innovation and Creative Program for PhD candidate [CXCY19-53]
- University of Cincinnati through a UNESCO co-Chair Professor position on Water Access and Sustainability
- Herman Schneider Professorship in the College of Engineering and Applied Sciences
The multifunctional dual-layer ultrafiltration membrane Seq-ICM showed high efficiency in removing multiple pollutants from wastewater, thanks to its sequential interception and oxidation process. This technology demonstrates promising potential for treating multicomponent substances in wastewater.
Fenton-like oxidation for multicomponent wastewater treatment suffers from a low efficiency due to non-selective nature of produced reactive species. In this study, a multifunctional dual-layer ultrafiltration membrane (Seq-ICM) was synthesized for multiple pollutants decontamination. Characterizations of the membranes indicate that Seq-ICM comprises a skin layer for ultrafiltration, and a porous support layer loaded with-50% MIL-53(Fe) for catalysis. With bovine serum albumin coexisting, Seq-ICM can remove 75.7% bisphenol S (BPS), which is much higher than that of a simultaneous interception-catalysis membrane (44.2 %). For multicomponent wastewater treatment, Seq-ICM system can save similar to 59%-67% oxidant dosage as well compared with catalysis alone membrane system to achieve 50% BPS removal. Furthermore, the decontamination mechanisms were investigated to explain the advantages of Seq-ICM. Sequential interception and oxidation process by Seq-ICM leads to the interception of macromolecular substances first, following by catalytic oxidation of low molecular-weight organics. This process prevents macromolecular substances from competing for active species with low-molecular-weight organics, thereby enhancing selectivity and oxidation efficiency. Meanwhile, Seq-ICM shows satisfactory BPS removal efficiency for treatment of 2865 L/m(2) synthetic solution, as well as in real wastewater matrix. We believe the proposed technology based on a composite membrane is promising for the removal of multicomponent substances from wastewater.
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