Phosphate removal from aqueous solution using iron oxides: adsorption, desorption and regeneration characteristics

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dc.contributor.authorAjmal, Zeeshan
dc.contributor.authorMuhmood, Atif
dc.contributor.authorUsman, Muhammad
dc.contributor.authorKizito, Simon
dc.contributor.authorLu, Jiaxin
dc.contributor.authorDong, Renjie
dc.contributor.authorWu, Shubiao
dc.date.accessioned2022-06-17T09:57:22Z
dc.date.available2022-06-17T09:57:22Z
dc.date.issued2018
dc.description.abstractDynamics of phosphate (PO4 3-) adsorption, desorption and regeneration characteristics of three lab-synthesized iron oxides, ferrihydrite (F), goethite (G), and magnetite (M) were evaluated in this study. Batch experiments were conducted to evaluate the impact of several adsorption parameters including adsorbent dosage, reaction time, temperature, pH, and ionic strength. The results showed that PO4 3- adsorption increased with reaction time and temperature while it decreased with an increase in solution pH. Adsorption isotherm data exhibited good agreement with the Freundlich and Langmuir model with maximum monolayer adsorption capacities of 66.6 mg·g-1 (F), 57.8 mg·g-1 (M), and 50.5 mg·g-1 (G). h u u Δ < ΔH > ΔS > demonstrating that PO4 3- adsorption onto tested minerals is endothermic, spontaneous, and disordered. The PO4 3- removal mostly occurred via electrostatic attraction between the sorbate and sorbent surfaces. Moreover, the PO4 3- sorption was reversible and could be desorbed at varying rates in both neutral and alkaline environments. The good desorption capacity has practical benefits for potential regeneration and re-use of the saturated particles in wastewater treatment systems.en_US
dc.identifier.citationZ. Ajmal, A. Muhmood, M. Usman, S. Kizito, J. Lu, R. Dong, S. Wu, Phosphate removal from aqueous solution using iron oxides: adsorption, desorption and regeneration characteristics, Journal of Colloid and Interface Science (2018), doi: https://doi.org/10.1016/j.jcis.2018.05.084en_US
dc.identifier.urihttps://doi.org/10.1016/j.jcis.2018.05.084
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/4004
dc.language.isoenen_US
dc.publisherJournal of Colloid and Interface Scienceen_US
dc.subjectPhosphateen_US
dc.subjectIron oxides particlesen_US
dc.subjectWastewater treatmenten_US
dc.subjectRegenerationen_US
dc.titlePhosphate removal from aqueous solution using iron oxides: adsorption, desorption and regeneration characteristicsen_US
dc.typeArticleen_US
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