Journal
CHEMICAL ENGINEERING JOURNAL
Volume 410, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.128289
Keywords
Gravity-driven filtration; Microporous membranes; Pathogenic disinfection; Biofouling mitigation
Categories
Funding
- National Natural Science Foundation of China [51961125104, 51908162]
- Heilongjiang Natural Science Foundation Project [LH2020E053]
- National Science and Technology Major Projects for Water Pollution Control and Treatment [2017ZX07201003]
- China Postdoctoral Science Special Foundation [2018T110304]
- China Postdoctoral Science Foundation [2017M621288]
- Program for the Top Young Talents [AUGA5710051819]
- Major National Science and Technology Projects and Key Research and Development Projects of China [GX18A024]
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This study introduces a novel multifunctional gravity-driven membrane system for household-level pathogenic disinfection and biofouling prevention. The membrane, modified with polyphenol deposition, demonstrates enhanced positive charge, hydrophilicity, and metal-binding ability, effectively removing pathogens and heavy metals. Results show that the membrane platform has potent efficacy in biofilm prevention, indicating promising potential for improving contaminated water sources in remote and underdeveloped areas.
In remote industrial areas, access to safe drinking water is often hindered by local water contamination and unreliable infrastructure. Hence, energy-effective water treatment and safe storage technology is vital and highly desirable to tackle complex water pollution caused by heavy metals and pathogenic contaminants for boundary circumstances. Here, we originally engineered a multifunctional gravity-driven membrane system to provide a household-level approach to pathogenic disinfection and biofouling prevention. Facile one-step polyphenol deposition strategy was applied on microporous membranes, tailoring the membrane surface with enhanced positive charge, favorable hydrophilicity and metal-binding ability. When applied in gravity-driven filtration of simulated multi-component wastewater containing heavy metals and pathogenic contaminants, the as-prepared membrane achieved >6 log pathogenic reduction. Metal ions could be in-situ captured and stabilized at membrane interface via natural binding and reduction by polyphenol-engineered surface chemistry, endowing ensuing membranes with improved antibacterial activity. By virtue of enhanced membrane surface properties and antimicrobial synergy, such engineered membrane platform showed potent efficacy in biofilm prevention with 97% reduced ATP content and easy permeation recovery (>90%) in cyclic operation. This study is promising for developing low-energy and easy-to-use membrane system to improve contaminated water sources in remote and underdeveloped areas at household level.
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