Continuous fixed bed biosorption of reactive dyes by dried Rhizopus arrhizus: Determination of column capacity

Aksu, Zümríye; Çağatay, Şeyda; Gönen, Ferda

doi:10.1016/j.jhazmat.2006.09.039

Cited by 119 publications

(58 citation statements)

References 29 publications

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“…Increase in flowrate caused increase in rate of mass transfer and poor residence time, resulting in increasing outlet concentration and faster breakthrough. The similar result was also obtained when the removal of reactive black by granular activated carbon was studied in a fixed-bed column (Aksu et al 2007). The standard deviations were calculated for the above case, and the corresponding deviation was found to be 0.000562.…”

Section: Effect Of Flowratesupporting

confidence: 76%

Fixed-bed column study for the adsorptive removal of acid fuchsin using carbon–alumina composite pellet

Dutta

Basu

2013

Int. J. Environ. Sci. Technol.

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The carbon-alumina composite pellet was developed for the adsorption of acid fuchsin from its aqueous solution. The composite pellet was characterized using Brunauer-Emmett-Teller method, scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy. The adsorption capacity of commercial alumina, commercial activated carbon and the prepared composite pellet was investigated against acid fuchsin, and the adsorption capacity was found to be increased in the order of alumina \ carbon-alumina composite pellet \ activated carbon. Although the adsorption capacity of carbon-alumina composite pellets was less than that of activated carbon, the use of the pelletized form of the present adsorbent was proven to be advantageous for the use in the packed-bed column. The experimental data were fitted to Langmuir, Freundlich and Temkin adsorption isotherms, and the equilibrium behavior was well explained by Langmuir isotherm. Besides, the kinetic behavior was well predicted by pseudo-second-order kinetics. The effects of inlet dye concentration (10-20 mg/L), feed flowrate (5-15 mL/min) and bed height (2.54-7.62 cm) on the breakthrough characteristics were investigated using a fixed-bed column. The maximum removal capacity in the column study was found to be 343.87 mg/L with an initial dye concentration and flowrate of 20 and 10 mL/min according to Bohart-Adams model. The breakthrough behavior was also effectively described by the Yoon-Nelson and Clark models.

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Section: Effect Of Flowratesupporting

confidence: 76%

Fixed-bed column study for the adsorptive removal of acid fuchsin using carbon–alumina composite pellet

Dutta

Basu

2013

Int. J. Environ. Sci. Technol.

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“…It is observed that the increase in flow rate results in a reduction in both breakthrough points and saturation times, thus corroborating with the literature (Padmesh et al, 2005;Aksu et al, 2007) and experimental observations ( Table 2). The shape of metal ion concentration profiles at the column outlet proved to bequite similar for the two simulated conditions; however, the greater the slope of the curve, the higher the feed flow rate.…”

Section: Resultssupporting

confidence: 91%

Mathematical modeling of manganese adsorption onto bone char in a continuous fixed bed column incorporating backmixing and shriking core approaches

Maria

Mansur

2017

Braz. J. Chem. Eng.

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-The present study investigated the dynamics of manganese adsorption onto bone char in a continuous fixed bed column using a mathematical model that incorporates: (i) the backmixing model to describe the fluid flow through the bed and (ii) the shrinking core model to describe the kinetic and mass transfer phenomena within spherical adsorbent particles. The proposed model consists of an ordinary differential equation system. Hydrodynamic, kinetic and diffusive parameters were determined by fitting the mathematical model to the experimental data obtained by Sicupira et al. (2015). For the operating conditions evaluated in this study, the intraparticle diffusion represented the controlling step of the adsorption process (Bi m > 3.8). The increase in the feed rate of the column (3.0-7.5 mL min -1 ) and the decrease in the height of the bed (8-16 cm) resulted in a decrease in the time required for the saturation of the column bed. The model is flexible for a variety of flow conditions and adequately reproduced the behavior of the manganese adsorption process in the fixed bed column operation (R²> 0.99) with an average percentage error less than15%.

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“…equations [36]. These models tested for MB adsorption in the column study were summarized in Table 3.…”

Section: Cmss-2017mentioning

confidence: 99%

Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

et al. 2018

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Abstract. Cationic dye adsorption from aqueous solution onto synthesized geopolymer was investigated by batch and fixed bed column experiments. The geopolymer material was elaborated by alkali solution and fly ash supplied by Jorf Lasfar power plant of Morocco. Physical and chemical characteristics of samples were determined by FX, DRX, SEM, 29 Si MAS NMR and Zeta potential methods. The Brunauer, Emmett and Teller (BET) technique is used to determine the surface area. The Barrett-Joyner-Halenda (BJH) method was performed to obtain pore size distribution curves and average pore diameter. Kinetics data were analyzed using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. To predict the breakthrough curves and determine the main fixed bed column parameters, three kinetic models; Tomas, Bohart-Adams and YoonNelson models are applied to fitting the experimental data. The kinetic study showed that the pseudo-secondorder can be used to describe the methylene blue (MB) adsorption process on the geopolymer matrix. The kinetic models of the adsorption in dynamic column are suitable to describe the continuous adsorption process of dyestuff by the geopolymer. The results of this study indicated that geopolymer derived from fly ash can be used as a low cost effective adsorbent for cationic dye removal from industrial aqueous effluent.

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Continuous fixed bed biosorption of reactive dyes by dried Rhizopus arrhizus: Determination of column capacity

Cited by 119 publications

References 29 publications

Fixed-bed column study for the adsorptive removal of acid fuchsin using carbon–alumina composite pellet

Fixed-bed column study for the adsorptive removal of acid fuchsin using carbon–alumina composite pellet

Mathematical modeling of manganese adsorption onto bone char in a continuous fixed bed column incorporating backmixing and shriking core approaches

Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

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