Abstract
This study is focused on the trace removal of hexavalent chromium [Cr(VI)] using a weak base anion exchanger, Amberlite IRA 96, in the presence of competing anions such as sulphate, chloride and bicarbonate in natural water conditions. Batch equilibrium studies such as isotherm study, kinetic study and fixed bed sorption study revealed the transport of toxic Cr(VI) from aqueous solution to the exchanger surface, uptake capacity and overall rate-controlling step. Anion exchanger showed selectivity towards the toxic Cr(VI) with a high sorption capacity found fitted by the Freundlich model. Mobile region transport is described by the convection–dispersion model equation, and the choice for Cr(VI) transfer between liquid and solid phases can be done by considering the non-equilibrium MIM (mobile–immobile) model. Fixed bed column confirmed feed water containing 200 μg/L of Cr(VI) with competing anion could treat up to 628 Bed Volumes (BVs) before exhaustion, and the possibility of regeneration proves the real-life application of the ion exchange process in trace contaminant removal from drowned ground conditions.
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Laiju, A.R., Mayank, M., Sarkar, S., Sharma, P.K. (2022). Study and Modelling of Trace Contaminant Transport Under Drowned Condition. In: Jha, R., Singh, V.P., Singh, V., Roy, L., Thendiyath, R. (eds) Groundwater and Water Quality. Water Science and Technology Library, vol 119. Springer, Cham. https://doi.org/10.1007/978-3-031-09551-1_9
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