Use of rice husk for the adsorption of congo red from aqueous solution in column mode

Han, Runping; Ding, Derui; Yj, Xu; Zou, Weihua; Wang, Yuanfeng; Li, Yufei; Zou, Lina

doi:10.1016/j.biortech.2007.06.027

Cited by 510 publications

(205 citation statements)

References 42 publications

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“…Increasing the influent concentration led to an increase in the value of KTH and a decrease in the value of qo. This is attributed to the driving force of adsorption between the dye existed on both adsorbents and the dye present in the solution [30][31]. However, qo increased and KTH decreased with the increase in bed height.…”

Section: Thomas Modelmentioning

confidence: 98%

Fixed-Bed Column Studies for the Removal of Congo Red Using <i>Simmondsia chinesis</i> (Jojoba) and Coated with Chitosan

et al. 2018

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Section: Thomas Modelmentioning

confidence: 98%

Fixed-Bed Column Studies for the Removal of Congo Red Using <i>Simmondsia chinesis</i> (Jojoba) and Coated with Chitosan

et al. 2018

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“…The Thomas model is another one frequently applied to estimate the adsorptive capacity of adsorbent and predict breakthrough curves, assuming the second-order reversible reaction kinetics and the Langmuir isotherm (Han et al, 2008;Ghasemi et al, 2011). Theoretically, it is suitable to estimate the adsorption process where external and internal diffusion resistances are extremely small (Aksu and Gönen, 2004).…”

Section: Thomas Modelmentioning

confidence: 99%

“…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

328

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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“…A large number of low-cost biosorbents, including fungal biomass, yeast, algal biomass, plant waste, fiber, fruit waste, chitosan and agricultural wastes, have been evaluated for the removal of dyes from wastewater (Chatterjee et al 2007;Han et al 2008). On the other hand, there has been continuous investigation aimed at developing better and more easily available biological materials.…”

Section: Introductionmentioning

confidence: 99%

Characteristics, kinetics and thermodynamics of Congo Red biosorption by activated sulfidogenic sludge from an aqueous solution

Rasool

Lee

2013

Int. J. Environ. Sci. Technol.

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The kinetics and thermodynamics of the biosorption of textile dye Congo Red on anaerobic activated sulfidogenic sludge were examined. The influence of different adsorption parameters such as pH, temperature, contact time and initial dye concentrations on the biosorption capacity was also investigated. The sulfidogenic sludge showed a maximum biosorption density of 238.90 mg dye/g cell for Congo Red at an initial dye concentration of 1,000 mg/L, pH 3.5 and 22°C, which is higher than that of many other adsorbents reported in the literature. The biosorption processes obeyed the Langmuir isotherm and exhibited pseudo-second-order rate kinetics. The thermodynamic parameters indicated the spontaneous and exothermic nature of Congo Red biosorption. The Fourier transform infrared spectra revealed the dye interaction with the biomass. Scanning electron microscopy showed significant changes in the surface morphology of the sludge after dye biosorption. These results showed that sulfidogenic sludge biomass is an attractive alternative low-cost biosorbent for the removal of the dye from aqueous media.

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Use of rice husk for the adsorption of congo red from aqueous solution in column mode

Cited by 510 publications

References 42 publications

Fixed-Bed Column Studies for the Removal of Congo Red Using <i>Simmondsia chinesis</i> (Jojoba) and Coated with Chitosan

Fixed-Bed Column Studies for the Removal of Congo Red Using <i>Simmondsia chinesis</i> (Jojoba) and Coated with Chitosan

Mathematically modeling fixed-bed adsorption in aqueous systems

Characteristics, kinetics and thermodynamics of Congo Red biosorption by activated sulfidogenic sludge from an aqueous solution

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