Aqueous phase adsorption of aromatic organoarsenic compounds : a review

dc.contributor.authorIwuozor, Kingsley O.
dc.contributor.authorAkpomie, Kovo G.
dc.contributor.authorConradie, Jeanet
dc.contributor.authorAdegoke, Kayode Adesina
dc.contributor.authorOyedotun, Kabir Oyeniran
dc.contributor.authorIghalo, Joshua O.
dc.contributor.authorAmaku, James F.
dc.contributor.authorOlisah, Chijioke
dc.contributor.authorAdeola, Adedapo Oluwasanu
dc.date.accessioned2023-02-10T07:33:16Z
dc.date.issued2022-10
dc.description.abstractAromatic organoarsenic compounds (AOCs) are synthetic arsenic-based compounds released into the environment through anthropogenic activities. Due to their high solubility and mobility in aqueous media, AOCs as well as their degradation products can exist for a long time in the environment. This study is a review of published literature that discusses the sequestration of AOCs from aqueous media through the technique of adsorption. Key components related to the adsorption of AOCs such as adsorbent performance, adsorption mechanism, isotherm, kinetic as well as thermodynamic modelling, and desorption/regeneration of adsorbents were discussed in this paper. It was observed that the highest reported adsorption capacities for the AOCs were 975 mg/g for Roxarsone using nano-zerovalent iron/sludge-based biochar, 791 mg/g for p-arsanilic acid using a mesoporous zeolitic imidazolate framework, and 139 mg/g for Phenyl arsonic acid using a hydroxy-functionalized Chromium-based MOF. Adsorption mechanisms were dominated by hydrogen bonding, complexation reactions, electrostatic interactions, and electron donor-acceptor interactions. The Langmuir or Freundlich classical isotherm models were the best-fit in most cases to describe AOCs' adsorption equilibrium, while the pseudo-second-order model was the best-fit for the modelling of AOCs' uptake kinetics. Thermodynamic studies revealed that AOCs' uptake is usually spontaneous (with a few exceptions). This suggests that adsorption can be economical on an industrial scale for the removal of AOCs from aqueous solutions. For future work, the utilization of column systems for AOCs adsorption should be encouraged together with the proper disposal or recycling of used adsorbents.en_US
dc.description.departmentChemical Engineeringen_US
dc.description.embargo2024-08-13
dc.description.librarianhj2023en_US
dc.description.urihttps://www.elsevier.com/locate/jwpeen_US
dc.identifier.citationIwuozor, K.O., Akpomie, K.G., Conradie, J. et al. 2022, 'Aqueous phase adsorption of aromatic organoarsenic compounds: a review', Journal of Water Process Engineering, vol. 49, art. 103059, pp. 1-17, doi : 10.1016/j.jwpe.2022.103059.en_US
dc.identifier.issn2214-7144 (online)
dc.identifier.other10.1016/j.jwpe.2022.103059
dc.identifier.urihttps://repository.up.ac.za/handle/2263/89390
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2022 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Journal of Water Process Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Journal of Water Process Engineering, vol. 49, art. 103059, pp. 1-17, 2022, doi : 10.1016/j.jwpe.2022.103059.en_US
dc.subjectAromatic organoarsenic compounds (AOCs)en_US
dc.subjectAdsorptionen_US
dc.subjectAromatic organoarsenicalsen_US
dc.subjectArsenicen_US
dc.subjectEnvironmenten_US
dc.subjectMechanismen_US
dc.titleAqueous phase adsorption of aromatic organoarsenic compounds : a reviewen_US
dc.typePostprint Articleen_US

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