Feasibility analysis of As(III) removal in a continuous flow fixed bed system by modified calcined bauxite (MCB)

Bhakat, P.B.; Gupta, Ashok Kumar; Ayoob, S.

doi:10.1016/j.jhazmat.2006.06.037

Cited by 46 publications

(24 citation statements)

References 17 publications

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“…At higher flow rates the lead ions did not have enough time to diffuse into the pores of the red mud and they exited the column before equilibrium occurred. Similar results have been found for As (III) removal in a fixed-bed system using modified calcined bauxite and for color removal in a fixed-bed column system using surfactant-modified zeolite [29,30].…”

Section: Column Adsorption Experiments 321 Effect Of Flow Ratesupporting

confidence: 84%

Research on the Batch and Fixed-Bed Column Performance of Red Mud Adsorbents for Lead Removal

2014

Can Chem Trans

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Abstract:The removal of lead from water by red mud using batch and fixed-bed column adsorption techniques was investigated. In a batch study, experiments indicated that the time to attain equilibrium was 2h. The experimental data fitted well to a Langmuir adsorption isotherm and the adsorption capacity was 18.87 mg/g. Fixed-bed column experiments were carried out for different influent lead concentrations, bed depths, and various flow rates. The breakthrough time and exhaustion time decreased with increasing flow rate, decreasing bed depth and increasing influent lead concentration. The bed depth service time model and the Thomas model were applied to the experimental results. Both model predictions were in good agreement with the experimental data for all the process parameters studied, indicating that the models were suitable for red mud fix-bed column design.

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Section: Column Adsorption Experiments 321 Effect Of Flow Ratesupporting

confidence: 84%

Research on the Batch and Fixed-Bed Column Performance of Red Mud Adsorbents for Lead Removal

2014

Can Chem Trans

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“…Modified calcined bauxite was also used for As(III) and As(V) remediation from ground water [119][120][121][122] in batch and column modes. The optimum pH was ∼7.0 for both As(III) and As(V).…”

Section: Red Mudmentioning

confidence: 99%

Arsenic removal from water/wastewater using adsorbents—A critical review

Mohan

Pittman

2007

Journal of Hazardous Materials

3,134

1,445

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“…Note that the B-A model (or bed depth service time (BDST) model) involves several important variables of adsorption system such as C F , u, q m , and H, and approximate estimation of the effect of each parameter from both models is achievable. As two widely used models in practice, the B-A and BDST models succeeded in predicting several breakthrough curves and optimizing the parameters, although it is relatively rough Bhakat et al, 2007;Maji et al, 2007;Han et al, 2008;Srivastava et al, 2008).…”

Section: Bohart-adams Model and Bed Depth Service Time (Bdst) Modelmentioning

confidence: 99%

Mathematically modeling fixed-bed adsorption in aqueous systems

Cai

Pan

2013

J. Zhejiang Univ. Sci. A

345

166

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Adsorption is one of the widely used processes in the chemical industry environmental application. As compared to mathematical models proposed to describe batch adsorption in terms of isotherm and kinetic behavior, insufficient models are available to describe and predict fixed-bed or column adsorption, though the latter one is the main option in practical application. The present review first provides a brief summary on basic concepts and mathematic models to describe the mass transfer and isotherm behavior of batch adsorption, which dominate the column adsorption behavior in nature. Afterwards, the widely used models developed to predict the breakthrough curve, i.e., the general rate models, linear driving force (LDF) model, wave propagation theory model, constant pattern model, Clark model, Thomas model, Bohart-Adams model, Yoon-Nelson model, Wang model, Wolborska model, and modified dose-response model, are briefly introduced from the mechanism and mathematical viewpoint. Their basic characteristics, including the advantages and inherit shortcomings, are also discussed. This review could help those interested in column adsorption to reasonably choose or develop an accurate and convenient model for their study and practical application.

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Feasibility analysis of As(III) removal in a continuous flow fixed bed system by modified calcined bauxite (MCB)

Cited by 46 publications

References 17 publications

Research on the Batch and Fixed-Bed Column Performance of Red Mud Adsorbents for Lead Removal

Research on the Batch and Fixed-Bed Column Performance of Red Mud Adsorbents for Lead Removal

Arsenic removal from water/wastewater using adsorbents—A critical review

Mathematically modeling fixed-bed adsorption in aqueous systems

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