Kinetic and isotherm studies on adsorption of arsenic using silica based catalytic media

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dc.contributor.authorAremu, James Oyedijien_NZ
dc.contributor.authorLay, Mark C.en_NZ
dc.contributor.authorGlasgow, Graeme D.E.en_NZ
dc.date.accessioned2019-11-18T22:23:43Z
dc.date.available2019-12-01en_NZ
dc.date.available2019-11-18T22:23:43Z
dc.date.issued2019en_NZ
dc.description.abstractThis study investigates the removal of arsenic (both As (III) and As (V)) from drinking water using a silica based catalytic media (DMI-65). In this study, BET, FTIR, XRD, SEM and XRF were used to characterize the adsorbent before and after contact with As (III) and As (V). Batch experiments were performed to evaluate the adsorption kinetics at different pH (5, 6, 7 and 8.5). The kinetic study showed that a contact time of 6 h was needed to reach equilibrium and the experimental data were best fitted to the pseudo second-order kinetic model for both As (III) and As (V). Several batch tests were conducted with different concentration of arsenic at different pH conditions (5, 6, 7 and 8.5). During the adsorption test, the maximum adsorption of As (III) occurred at pH 5, while As (V) adsorption reached its maximum at pH 8.5. The adsorption data showed a good fit to Langmuir isotherm models and the maximum adsorption capacity of the silica based catalytic media for As (III) and As (V) were estimated to be 0.318 mg/g and 0.237 mg/g respectively.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationAremu, J. O., Lay, M. C., & Glasgow, G. D. E. (2019). Kinetic and isotherm studies on adsorption of arsenic using silica based catalytic media. Journal of Water Process Engineering, 32. https://doi.org/10.1016/j.jwpe.2019.100939en
dc.identifier.doi10.1016/j.jwpe.2019.100939en_NZ
dc.identifier.issn2214-7144en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/13162
dc.language.isoen
dc.publisherElsevier
dc.relation.isPartOfJournal of Water Process Engineeringen_NZ
dc.rightsThis is an author’s accepted version of an article published in the journal: Journal of Water Process Engineering. © 2019 Elsevier.
dc.titleKinetic and isotherm studies on adsorption of arsenic using silica based catalytic mediaen_NZ
dc.typeJournal Article
pubs.elements-id240876
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/Staff
pubs.publication-statusAccepteden_NZ
pubs.user.infoAremu, James (joa3@students.waikato.ac.nz)
pubs.volume32en_NZ
uow.verification.statusunverified
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