Comparison of chromatography and desiccant silica gels for the adsorption of metal ions. II. Fixed-bed study

Tran, Huu Dung; Roddick, Felicity

doi:10.1016/s0043-1354(99)00018-4

Cited by 30 publications

(22 citation statements)

References 11 publications

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“…The values of these two parameters were found to be in good agreement with our previous study on batch kinetics of biosorption of copper and cadmium by the free fungus [9]. Similar to these findings, Tran and Roddick [28] observed that by fitting the adsorption data on uranium (VI) and lead onto silica gel in a column to BDST model, the estimated adsorption capacity values for uranium and lead were in good agreement with the Table 3 Sorption parameters for copper and cadmium obtained at 10% breakthrough in the two cycles according to the BDST model.…”

Section: Bdst Modelsupporting

confidence: 90%

“…In the present study, 0.1 N HCl was used for desorbing copper and cadmium from the respective metal-loaded columns. Figures 5 and 6 show desorption curves for the metals at different column bed depths in the two cycles of continuous operations, which typically show initially a steep rise followed by an equally shaped fall until negligible concentration of metals were detected in the effluent [23,27,28]. In the second sorption-desorption cycle, the sorption performance was necessarily related to the desorbing efficiency in the previous cycle, which was at least 64% for copper and 75% for cadmium ( Table 2).…”

Section: Regeneration Of the Metal-loaded Columns With 01 N Hclmentioning

confidence: 99%

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Biosorption of Copper and Cadmium in Packed Bed Columns with Live Immobilized Fungal Biomass of Phanerochaete chrysosporium

Pakshirajan

Swaminathan

2008

Appl Biochem Biotechnol

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Biosorption of copper (II) and cadmium (II) by live Phanerochaete chrysosporium immobilized by growing onto polyurethane foam material in individual packed bed columns over two successive cycles of sorption-desorption were investigated in this study. Initial pH and concentrations of the metals in their respective solutions were set optimum to each of those: 4.6 and 35 mg x l(-1) in case of copper and 5.3 and 11 mg x l(-1) for cadmium. The breakthrough curves obtained for the two metals during sorption in both the cycles exhibited a constant pattern at various bed depths in the columns. The maximum yield of the columns in removing these metals were found to be, respectively, 57% and 43% for copper and cadmium indicating that copper biosorption by the immobilized fungus in its column was better than for cadmium. Recovery values of the sorbed copper and cadmium metals from the respective loaded columns by using 0.1 N HCl as eluant was observed to be quite high at more than 65% and 75%, respectively, at the end of desorption in both the cycles. Breakthrough models of bed-depth service time, Adams-Bohart, Wolborska, and Clark were fitted to the experimental data on sorption of copper and cadmium in the columns, and only the Clark model could fit the sorption performance of the columns well over the entire range of ratios of concentrations of effluent to influent, i.e., C/C0 for both copper and cadmium biosorption. The kinetic coefficients of mass transfer and other suitable parameters in the system were determined by applying the experimental data at C/C0 ratios lower than 0.5 to the other three models.

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Section: Bdst Modelsupporting

confidence: 90%

Section: Regeneration Of the Metal-loaded Columns With 01 N Hclmentioning

confidence: 99%

Biosorption of Copper and Cadmium in Packed Bed Columns with Live Immobilized Fungal Biomass of Phanerochaete chrysosporium

Pakshirajan

Swaminathan

2008

Appl Biochem Biotechnol

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“…This procedure has been used by many authors studying column perfor- Fig. 5 BDST model plots for the sorption of cadmium in column packed with ZeNa at 10% (filled square), 30% (filled triangle) y 50% (filled diamond) of breakthrough mance over a wide range of pollutants and different types of adsorbents (Ko et al 1999;Tran and Roddick 1999;Deliyanni et al 2003;Santhy and Selvapathy 2004;Taty-Costodes et al 2005;Jusoh et al 2007). The Figs.…”

Section: Bdst Modelmentioning

confidence: 99%

“…The bed depth service time (BDST) model offer a simple approach and rapid prediction of absorber design. This model has been successfully used in describing and predicting heavy metal column adsorption using different adsorbents (Ko et al 1999;Tran and Roddick 1999;Deliyanni et al 2003;Santhy and Selvapathy 2004;Taty-Costodes et al 2005;Jusoh et al 2007).…”

mentioning

confidence: 99%

Removal of Cadmium By Natural and Surfactant-Modified Mexican Zeolitic Rocks in Fixed Bed Columns

Cortés-Martínez

Solache‐Ríos

Martínez-Miranda

et al. 2008

Water Air Soil Pollut

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The dynamic removal of cadmium from aqueous solutions by natural and surfactant-modified Mexican zeolitic rocks (clinoptilolite-heulandite type) in fixed bed column systems was investigated. The performances of fixed bed columns were described through the breakthrough curves obtained from column experiments and the values of column parameters predicted as a function of bed height. The column adsorption data were evaluated in terms of the bed adsorption capacity and the efficiency of the process. The experimental results fitted well the bed depth service time model (BDST) for both adsorbents, and the empty bed residence time model (EBRT) was used to optimize column operating conditions. The surface modification of the zeolitic rock with surfactant affected the removal of cadmium in fixed bed systems. Moreover, a column experiment with surfactant modified zeolitic rock previously saturated with 4-chlorophenol was carried out and the results showed that this saturation had a negative effect on the performance of the column.

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“…Lots of adsorbents have been investigated with the purpose of removing heavy metals from water: active carbon (Madhava Rao et al 2006;Papandreou et al 2007;Tumin et al 2008;Patnukao et al 2008;Chaudhuri et al 2010;Yahaya et al 2011), silicon dioxide (Tran and Roddick 1999), diatomite and apatite (De Castro Dantas et al 2001), sawdust, sugarcane bagasse and other natural materials (Stankovic et al 2009;Bedelean et al 2009;Santos et al 2011), different types of biomass (Kaewsarn 2002;Rangsayatorn et al 2004;Horsfall and Spiff 2005;Solisio et al 2006;Pane et al 2008). Among them, natural and synthetic zeolites hold a significant place (Erdem et al 2004;Gazola et al 2006;Basaldella et al 2007;Wu et al 2008;Halimoon and Yin 2010;Karatas 2012).…”

Section: Introductionmentioning

confidence: 99%

The usage of a zeolitic composite for quality improvement of copper contaminated mining wastewaters

Dascalu

Pitulice

Ionel

et al. 2014

Int. J. Environ. Sci. Technol.

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In this paper, a new material based on zeolite has been investigated in an attempt to explore the possibility of using it as an efficient adsorbent of copper(II) from industrial wastewater. This composite material is composed of volcanic tuff (containing 83 % zeolite) and cellulose in a 4 to 1 ratio. The performances of the new adsorbent composite have been examined against those of a common adsorbent, the zeolitic volcanic tuff. The adsorption studies were carried out in a batch process at room temperature, and the effect of various parameters (i.e., initial concentration, contact time, adsorbent dosage and pH) was tested. The experimental data have been modeled with Langmuir, Freundlich and Temkin isotherms. The results correspond to Langmuir model showing a monolayer adsorption with a maximum adsorption capacity of 12.74 mg g -1 at 25°C. The copper adsorption onto zeolitic composite was well described by a pseudo-second order kinetic model. The experimental results indicate a superior adsorption of copper(II) onto the new adsorbent when compared against the common zeolite.

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Comparison of chromatography and desiccant silica gels for the adsorption of metal ions. II. Fixed-bed study

Cited by 30 publications

References 11 publications

Biosorption of Copper and Cadmium in Packed Bed Columns with Live Immobilized Fungal Biomass of Phanerochaete chrysosporium

Biosorption of Copper and Cadmium in Packed Bed Columns with Live Immobilized Fungal Biomass of Phanerochaete chrysosporium

Removal of Cadmium By Natural and Surfactant-Modified Mexican Zeolitic Rocks in Fixed Bed Columns

The usage of a zeolitic composite for quality improvement of copper contaminated mining wastewaters

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