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Modelling and efficiency assessment of the up flow fixed bed process packed with Moringa oleifera for continuous Cd(II) removal from drinking water

Highlights•The continuous packed column data for biosorption of cadmium using Moringa oleifera were well fitted to the Thomas model with the regression coefficient ranges 0.966–0.993.•Moreover, the qth values obtained from Thomas model are similar to the experimental breakthrough capacities qexp.•The continuous packed column biosorption of cadmium using Moringa oleifera would make the wastewater treatment process economically feasible, reasonable and sustainable.AbstractThe biosorption ability of ‘Moringa oleifera ‘seed powder for the expulsion of cadmium from wastewater was investigated by performing packed column tests. Column tests were conducted as a function of biosorbent dose, influent flow rate and feed sorbate concentration. The findings from column operations revealed that values of maximum cadmium uptake, exhaustion and breakthrough time enhances with rise in bed depth, reduces with rise in feed volumetric flowrate and initial cadmium concentration. At 6 g of Moringa oleifera dose, 2 mL/min of flow rate and 300 µg/L of influent cadmium, the cadmium uptake capacity was found to be 65.44, µg/g. The continuous packed column data for cadmium were well fitted to the Thomas model with the regression coefficient ranges 0.966–0.993. Moreover, the qth values obtained from Thomas model are similar to the experimental breakthrough capacities qexp. The FTIR results reveals that the Moringa oleifera seed contains various active functional groups which are appears to be played a significant role in biosorption of cadmium ions. From practical view, the Moringa oleifera seed could be utilized as safe, inexpensive, sustainable and eco-friendly biosorbent for the elimination of cadmium from drinking water using continuous column mode and also this technology could be considered as an ideal for household usage in rural communities.Graphical abstractDownload : Download high-res image (132KB)Download : Download full-size image


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