Disinfection performance of adsorption using graphite adsorbent coupled with electrochemical regeneration for various microorganisms present in water

Hussain, S. N. and Trzcinski, A. P. and Asghar, H. M. A. and Sattar, H. and Brown, N. W. and Roberts, E. P. L. (2016) Disinfection performance of adsorption using graphite adsorbent coupled with electrochemical regeneration for various microorganisms present in water. Journal of Industrial and Engineering Chemistry, 44. pp. 216-225. ISSN 1226-086X

Abstract

The disinfection performance of the process of adsorption using a graphitic material combined with electrochemical regeneration for a range of microorganisms including bacteria, fungi, yeast and protozoa in a laboratory scale sequential batch reactor is demonstrated. The bacterial species studied were pseudomonas aeruginosa,Staphylococcus aureus and Legionella pneumophila. A 3.0 log10 reduction in the concentration of P. aeruginosa cells was achieved with the adsorbent that was regenerated at 30 mA cm�2 with 100% regeneration on each adsorption cycle. The process was quite effective in removing S. aureus present in water with a significantly higher reduction in the number of cells (ca. 9-log10 reduction) at relatively low current density (10 mA cm�2). Similarly, L. pneumophila were removed from water with a ca. 7.5-log10 reduction in the number of bacterial cells. The SEM images confirmed the adsorption of L. pneumophila onto the adsorbent and its electrochemical regeneration at 20 mA cm�2 that is considered a refractory pathogen against chlorination. The process was also found to be suitable for disinfecting fungal spores, Aspergillus awamori and yeasts including Saccharomyces cerevisiae and Rhodosporidium turoloides. However, the removal of Cryptosporidium parvum from water was not demonstrated successfully. The preliminary results suggest that using a chloride free environment and a relatively high current density could be useful in disinfecting C. parvum.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 07 Feb 2017 06:03
Last Modified: 08 Feb 2017 00:01
Uncontrolled Keywords: disinfection, adsorption, electrochemical regeneration, graphite intercalation compound
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090410 Water Treatment Processes
05 Environmental Sciences > 0502 Environmental Science and Management > 050205 Environmental Management
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objective: D Environment > 96 Environment > 9609 Land and Water Management > 960911 Urban and Industrial Land Management
Identification Number or DOI: 10.1016/j.jiec.2016.09.009
URI: http://eprints.usq.edu.au/id/eprint/29815

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