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Show simple item record Motshekga, Sarah C Ray, Suprakas S 2018-03-14T12:57:28Z 2018-03-14T12:57:28Z 2017-03
dc.identifier.citation Motshekga, S.C. and Ray, S.S. 2017. Highly efficient inactivation of bacteria found in drinking water using chitosan-bentonite composites: Modelling and breakthrough curve analysis. Water Research, vol. 111: 213-223 en_US
dc.identifier.issn 0043-1354
dc.description Copyright: 2017 Elsevier. Due to copyright restrictions, the attached PDF file only contains the accepted version of the published item. For access to the published item, please consult the publisher's website. en_US
dc.description.abstract Disinfection of bacterially-contaminated drinking water requires a robust and effective technique and can be achieved by using an appropriate disinfectant material. The advanced use of nanomaterials is observed as an alternative and effective way for the disinfection process and water treatment as a whole. Hence, the inactivation of Escherichia coli (E. coli) using chitosan-Bentonite (Cts-Bent) composites was studied in a fixed bed column. Cts-Bent composites were synthesized using in situ cross-linking method using Bent-supported silver and zinc oxide nanoparticles. These composites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy. The effect of the composite bed mass, initial concentration of bacteria, and flow rate on the bacterial inactivation was investigated. The characterization results revealed that the composites were successfully prepared and confirmed the presence of both silver and zinc oxide nanoparticles in the chitosan matrix. The growth curves of E. coli were expressed as breakthrough curves, based on the logistic, Gompertz, and Boltzmann models. The breakthrough time and processed volume of treated water at breakthrough were used as performance indicators, which revealed that the composites performed best at low bacterial concentration and flow rate and with substantial bed mass. The chitosan composites were found to be highly effective, which was demonstrated when no bacteria were observed in the effluent sample within the first 27 h of analysing river water. All the models were suitable for adequately describing and reproducing the experimental data with a sigmoidal pattern. Therefore, the prepared composite is showing potential to work as a disinfectant and provide an alternative solution for water disinfection; hence this study should propel further research of the same or similar materials. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Worklist;20519
dc.subject Chitosan-bentonite composites en_US
dc.subject Fixed bed column en_US
dc.subject Escherichia coli en_US
dc.subject Bacteria inactivation en_US
dc.subject Disinfection models en_US
dc.subject Breakthrough analysis en_US
dc.title Highly efficient inactivation of bacteria found in drinking water using chitosan-bentonite composites: Modelling and breakthrough curve analysis en_US
dc.type Article en_US

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