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Modeling of Fixed Bed Adsorption Column Parameters of Iron(II) Removal Using Ferrihydrite Coated Brick

American Journal of Analytical Chemistry 2023年第4期14卷 184-201页

作者： Oscar Allahdin Eric Foto nicole poumayé Olga Biteman Joseph Mabingui Michel Wartel UNESCO Chair “Water Management” Lavoisier Hydrosciences Laboratory University of Bangui Bangui Central African Republic University of Lille 1 LASIR Laboratory (UMR CNRS 8516) Environmental Physicochemistry Research Group Lille France

Fixed-bed operating experimental column conditions were studied to evaluate the performance of brick from Bangui Region (in Central African Republic), coated with iron oxyhydroxide (ferrihydrite) for the removal of iron(II) from aqueous solution. The prediction of theoretical breakthrough profiles using Bohart and Adams sorption model was employed to achieve characteristic parameters such as depth of exchange zone, time required for exchange zone to move vertically, moving rate for the exchange zone and adsorption capacity useful for fixed-bed column reactor was investigated under varying operating conditions. The effects of bed depth and flow rate on iron(II) adsorption were studied. Our finding revealed that the Brick from Bangui Region (in Central African Republic), coated with ferrihydrite was a very efficient media for the removal of Fe(II) ions from water. The experimental data showed that the depth and the moving rate (10.3 ± 0.6 cm) and (0.208 ± 0.006 cm/min) respectively of the exchange zone (adsorption zone) were independent of variability of the height of the adsorbent bed column, however the variations of the flow rate affect the moving rate of the exchange zone. The bed depth service time (BDST) model was used and permitted us to predict the service times of columns operated at various flow rates and bed depths and these predicted values were compared with the experimental values.

关键词： Iron Oxyhydroxide-Coated Brick Iron(II)-Adsorption Column Study Break-through Curve BDST

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