A non-electric and affordable Surface Engineered Particle (SEP) based Point-of-Use (POU) water disinfection system

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dc.contributor.author Dixit, Deepa
dc.contributor.author Soppina, Virupakshi
dc.contributor.author Ghoroi, Chinmay
dc.date.accessioned 2019-12-11T09:24:58Z
dc.date.available 2019-12-11T09:24:58Z
dc.date.issued 2019-12
dc.identifier.citation Dixit, Deepa; Soppina, Virupakshi and Ghoroi, Chinmay , "A non-electric and affordable Surface Engineered Particle (SEP) based Point-of-Use (POU) water disinfection system", Scientific Reports, DOI: 10.1038/s41598-019-54602-3, vol. 9, no. 1, Dec. 2019. en_US
dc.identifier.issn 2045-2322
dc.identifier.uri https://doi.org/10.1038/s41598-019-54602-3
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5021
dc.description.abstract Access to safe drinking water is still a distant dream to millions of people around the world. Especially, people from the low-income group in the developing countries remain deprived of this fundamental right and causes millions of death. There is an urgent need to develop affordable and easy to handle water filter which can provide desired drinking water quality without any electricity. In the present work, a simple and low-cost surface engineered particle (SEP) based filter is developed via alkali treatment of soda-lime-silica particle. The SEP based filter can be used as a portable, non-electric, gravity-driven Point-of-Use (POU) water disinfection system. The developed SEP-based filter is capable to arrest the 99.48% (~2 to 2.5 log10 reduction) of gram-negative bacteria Escherichia coli (E. coli OP50) on its surface from the water containing 3?�?108 cells/ml. No bacterial regrowth is observed in the purified water for 12?h. The performance of SEP bed filter is implicated to the nano-scale surface roughness, its distribution along with the surface charge and surface hydrophobicity which are favorable to attract and adhere the bacteria in the flowing water. The observation is consistent over multiple filtration cycles indicating the suitability of SEP based bed filter for POU water disinfection. The SEP surface with 0.05?mM Ag+ loading (SEP+) completely inactivated (>99.99999%) bacteria and protects any bacteria recontamination in the purified water for its long term usage. The strong and effective silver binding property of SEP surface enables very minimal silver loading and eliminates any health hazard due to low silver leaching (~50 ppb) which is well below the drinking water equivalent level (DWEL???100 ppb). In rural and urban slum areas of developing countries where no water purification system exists prior to consumption, the easy-to-implement and affordable SEP-based gravity-driven non-electric point-of-use water purifier (materials cost ~ 0.25 USD) can be used to protect millions of lives from water borne diseases.
dc.description.statementofresponsibility by Deepa Dixit, Virupakshi Soppina and Chinmay Ghoroi
dc.format.extent vol. 9, no. 1
dc.language.iso en_US en_US
dc.publisher Nature Research en_US
dc.title A non-electric and affordable Surface Engineered Particle (SEP) based Point-of-Use (POU) water disinfection system en_US
dc.type Article en_US
dc.relation.journal Scientific Reports


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