Hexavalent chromium removal and total chromium biosorption from aqueous solution by Quercus crassipes acorn shell in a continuous up-flow fixed-bed column: Influencing parameters, kinetics, and mechanism

The activated carbon of Eucalyptus globulus was tested for their effectiveness in removing hexavalent chromium from aqueous solution using column experiments. Result revealed that adsorption of chromium(VI) on eucalyptus bark carbon was endothermic in nature. Thermodynamic parameters such as the entropy change, enthalpy change and Gibbs free energy change were found to be 1.39 kJ mol−1 K−1, 1.08 kJ mol−1 and −3.85 kJ mol−1, respectively. Different chromium concentrations were used for the fixed bed adsorption studies. The pre- and post-treated adsorbents were characterized using a FTIR spectroscopic technique. It was concluded that Eucalyptus bark carbon column could be used effectively for removal of hexavalent chromium from aqueous solution at optimal column conditions. This study showed that this biological material is potential adsorbent of Cr(VI) from water.

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Adsorption of hexavalent chromium from aqueous solution by modified corn stalk: A fixed-bed column study

Bioresource Technology ◽

10.1016/j.biortech.2011.11.110 ◽

2012 ◽

Vol 113 ◽

pp. 114-120 ◽

Cited By ~ 259

Author(s):

Suhong Chen ◽

Qinyan Yue ◽

Baoyu Gao ◽

Qian Li ◽

Xing Xu ◽

...

Keyword(s):

Aqueous Solution ◽

Hexavalent Chromium ◽

Fixed Bed ◽

Corn Stalk ◽

Fixed Bed Column ◽

Column Study

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Fixed-bed column study for hexavalent chromium removal and recovery by short-chain polyaniline synthesized on jute fiber

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2008.05.147 ◽

2009 ◽

Vol 162 (2-3) ◽

pp. 1086-1098 ◽

Cited By ~ 112

Author(s):

Potsangbam Albino Kumar ◽

Saswati Chakraborty

Keyword(s):

Hexavalent Chromium ◽

Fixed Bed ◽

Short Chain ◽

Jute Fiber ◽

Chromium Removal ◽

Fixed Bed Column ◽

Column Study ◽

Removal And Recovery

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Removal of Cr (VI) from aqueous solution by activated charcoal derived from Sapindus trifoliate L fruit biomass using continuous fixed bed column studies

Water Science & Technology ◽

10.2166/wst.2021.217 ◽

2021 ◽

Author(s):

Samir Mohanta ◽

Monaj Kumar Sahu ◽

Prakash Chandra Mishra ◽

Anil Kumar Giri

Keyword(s):

Aqueous Solution ◽

Hexavalent Chromium ◽

Activated Charcoal ◽

Fixed Bed ◽

Maximum Adsorption Capacity ◽

Thomas Model ◽

Column Studies ◽

Fixed Bed Column ◽

Initial Concentration ◽

Bed Height

Abstract In this study, the removal of hexavalent chromium from aqueous solution were examined using activated charcoal derived from Sapindus trifoliate L fruit biomass in continuous fixed-bed column studies. The activated S. trifoliate L fruit charcoal was prepared by treating the fruit powder using concentrated nitric acid solution. Experiments were performed to investigate the effect of bed-height and initial concentration on the breakthrough and saturation times. The breakthrough and saturation time increases with increase in bed-height and initial concentration of chromium solutions. The maximum adsorption capacity of S. trifoliate L charcoal for hexavalent chromium was found to be 1.719 mg/g in the bed height 15 cm and initial concentration 10 mg/L, respectively. Column data required at various conditions were explained using Bohart-Adams and Thomas model. Two models were found to be suitable to describe the definite part of the dynamic behaviour of the column with regard to bed-height and initial concentration of hexavalent chromium. On comparison of Adjusted R2 and estimated standard error, the Thomas model was found to best-fitted model and can be used to predict the adsorption of the hexavalent chromium in fixed-bed column studies. Activated Sapindus trifoliate L fruit charcoal was characterised by SEM – EDX and FTIR analysis.

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