Fixed-bed column studies of pentachlorophenol removal by use of alginate-encapsulated pillared clay microbeads

Lezehari, Mouloud; Baudu, Michel; Bouras, Omar; Basly, Jean‐Philippe

doi:10.1016/j.jcis.2012.04.054

Cited by 51 publications

(25 citation statements)

References 39 publications

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“…It was also noticed that the slope of breakthrough curve decreased with increasing bed height; thus, it results in a extended mass transfer zone (Ahmad and Hameed 2010). This was due to the fact that with increasing bed height, more binding sites are available for adsorbate to diffuse through the pores of the adsorbent and the adsorption area increases (Tamez Uddin et al 2009;Lezehari et al 2012;Gupta and Babu 2009;Baral et al 2009). The breakthrough time in shorter bed is generally lower and complete utilization of the bed may not be possible (Sotelo et al 2013b).…”

Section: Effect Of Bed Heightmentioning

confidence: 97%

Adsorption of Phenol from Aqueous Solution Using Lantana camara, Forest Waste: Packed Bed Studies and Prediction of Breakthrough Curves

Girish

Murty²

2015

Environ. Process.

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In this paper, the feasibility of the dry stem of Lantana camara waste as an adsorbent to remove phenol from aqueous solution was investigated in a packed-bed column. The effect of bed height (5, 10, 15 cm), initial phenol concentration (100, 150, 250 mg L ) on the adsorption were studied by evaluating the breakthrough curves. The following models were used to assess the column performance: Thomas, Adams-Bohart, Yoon Nelson, Modified dose-response, linear driving force model based on fluid phase concentration difference (LDFC) and linear driving force model based on particle phase concentration difference (LDFQ). The Thomas model and the LDFC model were in good agreement with the experimental data. The bed depth service time (BDST) model was used to predict adsorption performance at other experimental conditions. The maximum adsorption capacity was found to be 149.77 mg g −1 , confirming that Lantana camara is a suitable adsorbent for the removal of phenol from aqueous solution.

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Section: Effect Of Bed Heightmentioning

confidence: 97%

Adsorption of Phenol from Aqueous Solution Using Lantana camara, Forest Waste: Packed Bed Studies and Prediction of Breakthrough Curves

Girish

Murty²

2015

Environ. Process.

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“…as well as inner sphere complexes of iron based on the experimental data together with the fraction diagram of arsenic species(Puigdom'enech 2004;Gim'enez et al 2007). The sorption of arsenate on beads involves interactions between the sorbate and the Isotherm for arsenic sorption on Cal-Alg-Goe beads: a Langmuir, b Freundlich hydroxyl group of the goethite(Lezehari et al 2012).…”

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confidence: 99%

Arsenic Removal from Groundwater by Goethite Impregnated Calcium Alginate Beads

Basu

Singhal

Pimple

et al. 2015

Water Air Soil Pollut

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In the present work, goethite (α-FeO(OH)) impregnated calcium alginate (Cal-Alg-Goe) beads were used to sorb the arsenic from groundwater without disturbing its physicochemical characteristics. Beads were formed by dropwise addition of homogenized mixer of goethite and 4 % sodium alginate solution in 0.2 M CaCl 2 solution. Charge, size, and morphology of sorbents were characterized by using various techniques. The results of batch sorption experiments suggest that Cal-Alg-Goe beads are very effective for removal of arsenic in the pH range 3.0 to 7.5, and sorption was more than 95 % in the concentration range of 10-10,000 ng mL −1 . Beads were successfully tested for groundwater samples collected from areas having elevated levels of arsenic. Equilibrium sorption follows Langmuir isotherm model, and the maximum arsenic uptake calculated was 30.44 mg g −1 . The sorption kinetics could be explained by pseudo-first-order model, and the time needed for equilibrium was 24 h.

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“…Inlet dye concentration varied from 50 to 100 mg L -1 , which shifts the breakthrough curve yielding lower breakthrough times. The earlier appearance of the breakthrough time with increasing inlet dye concentration is due to a faster saturation of the available binding sites [29]. The results of flow rate optimization, bed height, and initial dye concentration while using continuous mode study are given in Table 6.…”

Section: Fixed Bed Adsorption Experimentsmentioning

confidence: 99%