Antimicrobial Nanoparticles Mediated Prevention and Control of Membrane Biofouling in Water and Wastewater Treatment: Current Trends and Future Perspectives

Samal, Subhranshu; Misra, Modhurima; Rangarajan, Vivek; Chattopadhyay, Soham

doi:10.1007/s12010-023-04497-8

Cited by 1 publication

(1 citation statement)

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“…Substantial efforts have been made to create antimicrobial surfaces using the antimicrobial potentials of nanoparticles such as Ag, Cu 2 O, TiO 2 , ZnO and carbon-based materials 15 , 19 . However, the use of nanoparticles incorporated into surface membranes was mostly investigated for reducing biofouling 20 . Recently, researchers used the incorporation of antimicrobial nanostructures into polymeric or ceramic membranes to attain better pathogen removal 21 .…”

Section: Introductionmentioning

confidence: 99%

Cationic cellulose filter papers modified with ZnO/Ag/GO nanocomposite as point of use gravity-driven filters for bacterial removal from water

Ghaffari,

Sarrafzadeh

2023

Sci Rep

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The surface modification of filters with large pore sizes for the development of low-cost gravity-driven point-of-use (POU) technologies for water disinfection can be an effective strategy to empower people to access safe water instantly, especially in low- and middle-income countries. In this study, the surface of commercial cellulose filter papers, as cheap and bio-based filters, was modified with polydopamine (PDA), polyethyleneimine (PEI) and ZnO/Ag/GO nanocomposite (ZnO/Ag/GO@PDA/PEI papers) for bacterial removal from water. PDA/PEI incorporation introduced a cationic functional layer, which can entrap negative bacteria and make a stable chemical bond with the nanocomposite. ZnO/Ag/GO exhibited promising synergistic antibacterial activities (30 times stronger than ZnO). As a result, 3 sheets of ZnO/Ag/GO@PDA/PEI papers showed a 99.98% bacterial reduction (E. coli), which met the WHO standards. Moreover, the leached zinc and silver in the filtrate were far below the WHO’s limits (380 and 10 ppb, respectively). The results showed that the modified papers could be reused multiple times. After six times of reuse, the flow rate dropped slightly (below 20%) and the bacterial removal efficiency was more than 99.9%. This study is valuable for developing filters for treating bacterial-contaminated water on-site with no need for energy, which is a demand in many countries.

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