An integrated approach using ozone nanobubble and cyclodextrin inclusion complexation to enhance the removal of micropollutants

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dc.contributor.authorFan, Wei
dc.contributor.authorAn, Wengang
dc.contributor.authorHuo, Mingxin
dc.contributor.authorXiao, Dan
dc.contributor.authorLyu, Tao
dc.contributor.authorCui, Jingyu
dc.date.accessioned2021-03-16T16:07:45Z
dc.date.available2021-03-16T16:07:45Z
dc.date.issued2021-03-11
dc.description.abstractOzone (O3) has been widely used for the elimination of recalcitrant micropollutants in aqueous environments, due to its strong oxidation ability. However, the utilization efficiency of O3 is constrained by its low solubility and short half-life during the treatment process. Herein, an integrated approach, using nanobubble technology and micro-environmental chemistry within cyclodextrin inclusion cavities, was studied in order to enhance the reactivity of ozonisation. Compared with traditional macrobubble aeration with O3 in water, nanobubble aeration achieved 1.7 times higher solubility of O3, and increased the mass transfer coefficient 4.7 times. Moreover, the addition of hydroxypropyl-β-cyclodextrin (HPβCD) further increased the stability of O3 through formation of an inclusion complex in its molecule-specific cavity. At a HPβCD:O3 molar ratio of 10:1, the lifespan of O3 reached 18 times longer than in a HPβCD-free O3 solution. Such approach accelerated the removal efficiency of the model micropollutant, 4-chlorophenol by 6.9 times, compared with conventional macrobubble ozonation. Examination of the HPβCD inclusion complex by UV-visible spectroscopy and Nuclear Magnetic Resonance analyses revealed that both O3 and 4-chlorophenol entered the HPβCD cavity, and Benesi-Hildebrand plots indicated a 1:1 stoichiometry of the host and guest compounds. Additionally, molecular docking simulations were conducted in order to confirm the formation of a ternary complex of HPβCD:4-chlorophenol:O3 and to determine the optimal inclusion mode. With these results, our study highlights the viability of the proposed integrated approach to enhance the ozonation of organic micropollutantsen_UK
dc.identifier.citationFan W, An W, Huo M, et al., (2021) An integrated approach using ozone nanobubble and cyclodextrin inclusion complexation to enhance the removal of micropollutants. Water Research, Volume 196, May 2021, Article number 117039en_UK
dc.identifier.issn0043-1354
dc.identifier.urihttps://doi.org/10.1016/j.watres.2021.117039
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/16481
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectinclusion complexen_UK
dc.subjectHPβCDen_UK
dc.subjectemerging organic contaminantsen_UK
dc.subjectchlorophenolen_UK
dc.subjectadvanced oxidationen_UK
dc.titleAn integrated approach using ozone nanobubble and cyclodextrin inclusion complexation to enhance the removal of micropollutantsen_UK
dc.typeArticleen_UK

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