Electrochemically-active carbon nanotube coatings for biofouling mitigation: Cleaning kinetics and energy consumption for cathodic and anodic regimes

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dc.citation.firstpage391en_US
dc.citation.journalTitleJournal of Colloid and Interface Scienceen_US
dc.citation.lastpage397en_US
dc.citation.volumeNumber603en_US
dc.contributor.authorRice, Douglasen_US
dc.contributor.authorRajwade, Kimyaen_US
dc.contributor.authorZuo, Kuichangen_US
dc.contributor.authorBansal, Rishabhen_US
dc.contributor.authorLi, Qilinen_US
dc.contributor.authorGarcia-Segura, Sergien_US
dc.contributor.authorPerreault, Françoisen_US
dc.contributor.orgNanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatmenten_US
dc.date.accessioned2021-07-09T14:29:03Zen_US
dc.date.available2021-07-09T14:29:03Zen_US
dc.date.issued2021en_US
dc.description.abstractBiofouling is a major obstacle in engineered systems exposed to aqueous conditions. Many attempts have been made to engineer the surface properties of materials to render them resistant to biofouling. These modifications typically rely on passive antimicrobial or anti-adhesive surface coatings that prevent the deposition of bacteria or inactivate them once they reach the surface. However, no surface modification strategy completely prevents biofilm formation, and, over time, surfaces will be fouled and require cleaning. In this work, we demonstrate the capacity of electrochemical carbon nanotube coatings in dispersing biofilms formed on the surface. A systematic analysis of the biofilm removal kinetics in function of applied current density is made to identify the optimal current conditions needed for efficient surface cleaning. Operating the electrochemically active surface as a cathode produces superior results compared to when it is operated as an anode. Specifically, the 5.00 A m−2 and 2.50 A m−2 cathodic conditions produced rapid cleaning, with complete biofilm dispersal after 2 min of operation. Surface cleaning is attributed to the generation of microbubbles on the surface that scours the surface to remove the adhered biofilm. Energy consumption analyses indicate that the 2.50 A m−2 cathodic condition offers the best combination of cleaning kinetics and energy consumption achieving 99% biofilm removal at an energy cost of ~$ 0.0318 m−2. This approach can be competitive compared to the current chemical cleaning strategies, while offering an opportunity for a more sustainable and integrated approach for biofouling management in engineered systems.en_US
dc.identifier.citationRice, Douglas, Rajwade, Kimya, Zuo, Kuichang, et al.. "Electrochemically-active carbon nanotube coatings for biofouling mitigation: Cleaning kinetics and energy consumption for cathodic and anodic regimes." <i>Journal of Colloid and Interface Science,</i> 603, (2021) Elsevier: 391-397. https://doi.org/10.1016/j.jcis.2021.06.090.en_US
dc.identifier.doihttps://doi.org/10.1016/j.jcis.2021.06.090en_US
dc.identifier.urihttps://hdl.handle.net/1911/111008en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier.en_US
dc.subject.keywordCarbon nanotubesen_US
dc.subject.keywordBiofoulingen_US
dc.subject.keywordElectrochemistryen_US
dc.subject.keywordSelf-cleaningen_US
dc.subject.keywordCoatingsen_US
dc.titleElectrochemically-active carbon nanotube coatings for biofouling mitigation: Cleaning kinetics and energy consumption for cathodic and anodic regimesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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