Sequential Ultrafiltration-Catalysis Membrane for Excellent Removal of Multiple Pollutants in Water
| Autor: | Jia Xie, Chaohai Wang, Lianjun Wang, Junwen Qi, Linhan Ni, Zhipeng Liao, Xiuyun Sun, Shaobin Wang, Jiansheng Li, Ming Zhang |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Batch reactor Ultrafiltration Water Portable water purification General Chemistry Nanoreactor Human decontamination 010501 environmental sciences Silicon Dioxide 01 natural sciences Catalysis Water Purification Membrane chemistry Chemical engineering Environmental Chemistry Humic acid Environmental Pollutants Water Pollutants Chemical 0105 earth and related environmental sciences |
| Zdroj: | Environmental sciencetechnology. 55(4) |
| ISSN: | 1520-5851 |
| Popis: | Clean water production calls for highly efficient and less energy-intensive technologies. Herein, a novel concept of a sequential ultrafiltration-catalysis membrane is developed by loading Co3O4/C@SiO2 yolk-shell nanoreactors into the fingerlike channels of a polymeric ultrafiltration membrane. Such a sequenced structure design successfully integrates selective separation with peroxymonosulfate-based catalysis to prepare a functionalized molecular sieve membrane, which exhibits excellent decontamination performance toward multipollutants by filtering the water matrices containing humic acid (HA) and bisphenol A (BPA). In this study, 100% rejection of HA and 95% catalytic degradation of BPA were achieved under a low pressure of 0.14 MPa and an ultrahigh flux of 229 L m-2 h-1, corresponding to a retention time of 3.1 s. Notably, the removal performance of multiple pollutants essentially depends on the ordered arrangement of ultrafiltration and catalysis. Moreover, the flow-through process demonstrated significant enhancement of BPA degradation kinetics, which is 21.9 times higher than that of a conventional batch reactor. This study provides a novel strategy for excellent removal of multiple pollutants in water. |
| Databáze: | OpenAIRE |
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