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Heterogeneous photocatalysis for removal of microbes from water
Asian Institute of Technology, Thailand .ORCID iD: 0000-0002-0074-3504
2012 (English)In: Environmental Chemistry Letters, ISSN 1610-3653, E-ISSN 1610-3661, Vol. 10, no 2, 145-151 p.Article in journal (Refereed) Published
Abstract [en]

Increasing water pollution by microbes has become a source of serious health concern across the globe. Production of potentially carcinogenic disinfection by-products has marred credibility of traditional water purification techniques like chlorination. Photocatalysis has emerged as a promising alternative technique for the disinfection of water with minimal risk of harmful by-products. The process involves a wide band gap semiconductor material which, upon irradiation of light, produces electrons and holes with high redox potential to degrade organic contaminants and microbes. In this review, we analyze the research trends in photocatalytic inactivation of water borne microorganisms. This report analyzes the major factors that affect the disinfection efficiency using this process. The discussion also includes plausible mechanisms of microbial degradation as well as a kinetic model of the inactivation process. Different approaches, like doping of semiconductors or energy band engineering or plasmon coupling, have been reported for the enhancement and utilization of ambient solar light. Photocatalysis could be a cost-effective and environmentally friendly water purification technique though further research is required to enhance its efficiency with the use of solar light.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2012. Vol. 10, no 2, 145-151 p.
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-176522DOI: 10.1007/s10311-011-0347-xISI: 000303877100004ScopusID: 2-s2.0-84860707582OAI: oai:DiVA.org:kth-176522DiVA: diva2:914370
Note

QC 20160329

Available from: 2016-03-23 Created: 2015-11-07 Last updated: 2016-03-29Bibliographically approved

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Dutta, Joydeep
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