Application of carbon nanotube technology for removal of contaminants in drinking water: A review |
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Authors: | Venkata K.K. Upadhyayula Shuguang Deng Martha C. Mitchell Geoffrey B. Smith |
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Affiliation: | a Microbiology and Applied Biochemistry Division, Air Force Research Labs, 139 Barnes Drive, Suite II, Tyndall Air Force Base, Panama City, FL, 32403, United States b Chemical Engineering Department, New Mexico State University, P.O. Box 30001, MSC 3805, Las Cruces, NM 88003, United States c Biology Department, New Mexico State University, P.O. Box 30001, MSC 3AF, Las Cruces, NM 88003, United States |
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Abstract: | Carbon nanotube (CNT) adsorption technology has the potential to support point of use (POU) based treatment approach for removal of bacterial pathogens, natural organic matter (NOM), and cyanobacterial toxins from water systems. Unlike many microporous adsorbents, CNTs possess fibrous shape with high aspect ratio, large accessible external surface area, and well developed mesopores, all contribute to the superior removal capacities of these macromolecular biomolecules and microorganisms. This article provides a comprehensive review on application of CNTs as adsorbent media to concentrate and remove pathogens, NOM, and cyanobacterial (microcystin derivatives) toxins from water systems. The paper also surveys on consideration of CNT based adsorption filters for removal of these contaminants from cost, operational and safety standpoint. Based on the studied literature it appears that POU based CNT technology looks promising, that can possibly avoid difficulties of treating biological contaminants in conventional water treatment plants, and thereby remove the burden of maintaining the biostability of treated water in the distribution systems. |
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Keywords: | Adsorption Biological contaminants Carbon nanotubes Point of use treatment Drinking water Water treatment |
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