A New Model for Heavy Metal Removal in a Biosorption Column

Yang, Guangyu; Viraraghavan, T.; Chen, Min

doi:10.1260/0263617011493953

Cited by 421 publications

(197 citation statements)

References 6 publications

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“…This model was initially developed for pharmacology studies and recently used to describe adsorption of metals in some cases (Yan et al, 2001;Senthilkumar et al, 2006;Araneda et al, 2011). The modified dose-response model can be written as …”

Section: Modified Dose-response 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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Section: Modified Dose-response 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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“…One of the aims of these column studies was to achieve maximum capacities of a sorbent under specific boundary conditions. These capacities are needed to design full-scale systems for stormwater treatment (e.g., amount of sorbent and service life) [45]. The design of a full-scale system requires the prediction of the concentration-time profile or the breakthrough curve using lab-scale experiments.…”

Section: Column Experimentsmentioning

confidence: 99%

“…These removal capacities are important because they are needed to design full-scale systems for stormwater treatment (e.g., type and amount of sorbent, ratio of drainage area to filter area, or service life) [45]. For realistic stormwater runoff concentrations (2.5 mg/L and 5.0 mg/L) in batch experiments, all filter materials exhibited approximately 100% removal (with the exception of anthracite) and, therefore, achieved the same capacities (0.06 mg/g for Cu and Ni, 0.12 mg/g for Zn).…”

Section: Comparison Of Batch and Column Experiments Capacitiesmentioning

confidence: 99%

Evaluation of Factors Influencing Lab-Scale Studies to Determine Heavy Metal Removal by Six Sorbents for Stormwater Treatment

Huber

Badenberg

Wulff

et al. 2016

Water

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For the development of decentralized treatment systems for road runoff, the determination of pollutant removal capacities is essential. The aim of this study was to evaluate the impact of boundary conditions on the simultaneous removal of copper, nickel, and zinc by six sorbents used for urban stormwater treatment (i.e., granular activated alumina, anthracite, granular reactivated carbon, granular ferric hydroxide, calcium carbonate, and granular activated lignite). For batch experiments, capacities were determined at initial concentrations within the range of 2.5-180 mg/L with a rotary shaker. Further influences were investigated: the use of a horizontal shaker for concentrations of up to 1080 mg/L, a variation of the initial pH value (5 and 7), and the presence of a buffer. Furthermore, the influences of the filtration process on the capacities were studied. Kinetic experiments were conducted for contact times between 5 min and 120 min. Lab-scale column experiments with inflow concentrations of 2.5 mg/L (copper and nickel) and 5.0 mg/L (zinc) at an initial pH of 5 and a contact time of 11 min were performed for comparison. Selected experiments were subsequently carried out with changes in initial concentrations and contact time. One result is that it is essential to conduct batch experiments with the metals of interest. The capacities determined by column experiments deviated from batch experiments. Batch experiments under well-defined conditions can be used to evaluate different production batches. Column experiments give a more faithful capacity by considering realistic boundary conditions and should be preferred to determine efficiencies and service lives.

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“…This model was proposed for the description of heavy metal biosorption in columns [16]. It is has been recently employed in other studies and it is referred as being commonly used to describe different processes in pharmacology.…”

Section: B Adsorption Testsmentioning

confidence: 99%

“…Yan and his co-workers [16] observed that use of this model minimizes the error resulting from the use of the Thomas model, especially at lower or higher time periods of the breakthrough curve. However, the parameters in this model have no physical significance and hence cannot be evaluated accordingly.…”

Section: B Adsorption Testsmentioning

confidence: 99%

Comparative Evaluation of Activated Carbons Prepared by Thermo-Chemical Activation of Lignocellulosic Residues in Fixed Bed Column Studies

Alves¹,

Faustino²,

Franca³

et al. 2015

IJET

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Abstract-This paper presents a comparative evaluation of two activated carbons produced from different lignocellulosic residues (spent coffee grounds and Raphanus Sativus press cake), as adsorbents for removal of phenol from aqueous solutions in fixed-bed column studies. Both the prepared adsorbents presented outstanding adsorption capacities when compared to other low-cost adsorbents presented in the literature. Breakthrough curves were produced and several breakthrough models were evaluated for adequate description of the adsorption process in the column, with the Dose-Response model presenting the best fit to the experimental data.

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A New Model for Heavy Metal Removal in a Biosorption Column

Cited by 421 publications

References 6 publications

Mathematically modeling fixed-bed adsorption in aqueous systems

Mathematically modeling fixed-bed adsorption in aqueous systems

Evaluation of Factors Influencing Lab-Scale Studies to Determine Heavy Metal Removal by Six Sorbents for Stormwater Treatment

Comparative Evaluation of Activated Carbons Prepared by Thermo-Chemical Activation of Lignocellulosic Residues in Fixed Bed Column Studies

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