Design and model parameters estimation for fixed–bed column adsorption of Cu(II) and Ni(II) ions using magnetized saw dust

Abstract

A B S T R A C TFixed-bed column studies were performed using magnetized sawdust (Fe 3 O 4 -SD) as adsorbent for removal of Cu(II) and Ni(II) ions form aqueous solutions. Breakthrough curves were obtained by performing experiments in order to evaluate the influence of adsorbent bed height (2, 4, 8 cm), metal ion concentration in feed solution (10, 20, 30 mg/L), and feed flow rate (15, 20, 25 mL/min) for adsorption of Cu(II) and Ni(II) ions onto Fe 3 O 4 -SD adsorbent. Adsorption kinetics was analyzed using Bohart-Adams, Thomas, and Yoon-Nelson models. Kinetic data correlated well with both Thomas and Yoon-Nelson models, while Bohart-Adams model poorly predicted the model operation. Saturation loading capacity of adsorbent bed decreased with increase in adsorbent bed height, metal concentration in feed, and feed flow rate. Both mass transfer zone (MTZ) height and height of unused bed (H UNB ) noticeably increased with increase in the values of the parameter studied. The results showed that reduced MTZ height and lowest H UNB are suitable for operating the column satisfactorily.

Batch and fixed-bed column studies for the biosorption of Cu(II) and Pb(II) by raw and treated date palm leaves and orange peel

“…Hence, the lower bed depth improve the adsorption of both heavy metal ions on the studies adsorbents to a limited extent and the bed is saturated in less time for smaller bed heights which corresponds to less amount of adsorbent. These results are similar to those obtained by other researchers (Futalan et al, 2011;Cheraghi et al, 2016;Kapur and Mondal, 2016). These conditions can be attributed to the high driving force due to the high amount of heavy metal ions perforated into the packed bed of DP.…”

“…The increased breakthrough and exhaust times observed for deeper beds are attributed to their increased surface area and a larger amount of binding sites for heavy metal ions. Similar results were reported for adsorption of Cu 2+ by magnetized sawdust (Kapur and Mondal, 2016), in line with other investigations on the adsorption of different dyes onto plant-based adsorbents (Yagub et al, 2015;Sajab et al, 2015). ) and a bed height of 5 cm are shown in Fig.…”

“…On the other hand, columns with short bed height were saturated more quickly owing to lesser amount of adsorbent and the available binding sites. Similar pattern was reported in the previous research (Kapur and Mondal, 2016). The insignificant percentage error (describing the deviation of T values calculated using this model with experimental data (τ50% exp.))…”

Removal of Cu(II) by Fixed-Bed Columns Using Alg-Ch and Alg-ChS Hydrogel Beads: Effect of Operating Conditions on the Mass Transfer Zone

“…These values were higher than those reported for other low-cost adsorbents studied for the removal of Cu(II) at pH 5.0. A maximum bed capacity of 47.27 mg/g has been reported using kenaf fibers [ 40 ], 31.89 mg/g using magnetized sawdust [ 41 ], 58.23 mg/g for polyaniline-coated sawdust [ 42 ], and 16.52 mg/g when tethraethylenepentamine-modified sugarcane bagasse was used as the sorbent [ 43 ].…”

Estudio Termodinámico de la Remoción de Níquel y Cromo en Solución Acuosa usando Adsorbentes de Origen Agroindustrial

“…Información Tecnológica -Vol. 30 Nº 6 -2019 (Chao et al, 2014), 23,47 mg/g con aserrín magnetizado (Kapur y Mondal, 2016), 19,36 mg/g con hojas nativa de teca (Vilvanathan y Shanthakumar, 2017) y 60,39 mg/g con bagazo de caña de azúcar carboxilado (Pedrosa et al, 2018), sin embargo este último estudio fue llevado a cabo a concentraciones inicial de metal superiores a las del presente estudio, por cuanto había más disponibilidad para la toma metálica.…”