Transport processes in the sorption of colored ions by peat particles

McKay, Gordon; Allen, Stephen; McConvey, Ian F.; Otterburn, M. S.

doi:10.1016/0021-9797(81)90192-2

Cited by 199 publications

(100 citation statements)

References 5 publications

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“…The controlling mechanism of sorption was studied over a As(III) concentration range of from 50 to 1,000 mg/l in a 150 rpm agitated batch system (McKay et al 1981). Under well-mixed conditions, the external mass transport resistance is neglected and it is expected that the rate of uptake would be governed by the intraparticle or surface diffusion transport.…”

Section: Adsorption Diffusion Studymentioning

confidence: 99%

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Kamsonlian

Suresh

Ramanaiah

et al. 2012

Int. J. Environ. Sci. Technol.

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The present study deals with the biosorption of As(III) from aqueous solution using mango leaves powder (MLP) and rice husk (RH) in a batch operation. Scanning electron microscopy and Fourier transformation infrared spectrometry analysis shows the surface texture of biosorbents and metal binding of functional groups of before and after biosorption of As(III). The optimum pH was obtained at 7 and 6 with 7 and 6 g/l of dosage of MLP and RH, respectively. The adsorption of As(III) onto MLP and RH was favourably influenced by an increase in temperature. Equilibrium data were well represented by the Freundlich isotherm model. Nitric acid and ethylenediaminetetra acetic acid was found to be a better eluant for the desorption followed by hydrochloric acid and sodium hydroxide of As(III) with a maximum desorption efficiency of 69.5, 48.5 and 79.4, 86.3 %, respectively. The pseudosecond-order kinetic model was found to best fitted of the experimental data over the equilibrium time at 32 h. The positive values of heat of adsorption (23.89 kJ/mol for MLP and 52.26 kJ/mol for RH) indicate the endothermic nature of the adsorption process. The thermodynamic study showed the spontaneous nature of the sorption of As(III) onto MLP and RH.

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Section: Adsorption Diffusion Studymentioning

confidence: 99%

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Kamsonlian

Suresh

Ramanaiah

et al. 2012

Int. J. Environ. Sci. Technol.

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“…To further examine the kinetics of P adsorption and calculate the mass transfer coefficient L  , experimental kinetic data were fitted to a mass transfer model [16] t S mk…”

Section: Mass Transfermentioning

confidence: 99%

Equilibrium and kinetic analysis of phosphorus adsorption from aqueous solution using waste alum sludge

Babatunde

Zhao

2010

Journal of Hazardous Materials

127

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Excess phosphorus (P) in wastewaters promotes eutrophication in receiving waterways. A cost-effective method such as use of novel low-cost adsorbents for its adsorptive removal would significantly reduce such impacts. Using batch experiments, the intrinsic dynamics of P adsorption by waste alum sludge (an inevitable by-product of drinking water treatment plants)was examined. Different models of adsorption were used to describe equilibrium and kinetic data, calculate rate constants and determine the adsorption capacity. demonstrates that alum sludge -hitherto thought of as undesirable waste, can be used as novel adsorbent for P removal from wastewater through various applications, thus offsetting a portion of the disposal costs while at the same time improving water quality in sensitive watersheds.

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“…The molecular diffusion model suggested by McKay et al [48] was employed to examine the effect of initial concentration and adsorbent dosage on the rate of mass transfer. The external mass transfer coefficient was evaluated by assuming that the adsorption from the bulk solution occurs onto an interior site.…”

Section: Mass Transfer Studiesmentioning

confidence: 99%

Adsorption of carmoisine A from wastewater using waste materials—Bottom ash and deoiled soya

Gupta

Mittal

Malviya

et al. 2009

Journal of Colloid and Interface Science

300

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a b s t r a c tThe present study deals with the application of bottom ash, a power plant waste, and deoiled soya, an agricultural waste, for the adsorptive removal of carmoisine A dye from its aqueous solutions. This paper incorporates a comparative study of the adsorption characteristics of the dye on these effective adsorbents along with effects of time, temperature, concentration, and pH. Analytical techniques have been employed to find pore properties and characteristics of adsorbent materials. Batch adsorption studies, kinetic studies, and column operations have also been performed to understand the dye extraction ability of the adsorbents. The adsorption behavior of the dye has been studied using Freundlich, Langmuir, Tempkin, and Dubinin-Radushkevich adsorption isotherm models. The monolayer adsorption capacity determined from the Langmuir adsorption equation has been found as 1.78 Â 10 À5 and 5.62 Â 10 À5 mol g À1 at 323 K for bottom ash and deoiled soya, respectively. Kinetic measurements suggest the involvement of pseudo-second-order kinetics in both adsorptions and each case is controlled by a particle diffusion process. Column experiments demonstrated that both adsorbents could be practically utilized in elimination of hazardous dye from effluent and dye material can be recovered by eluting NaOH through the exhausted columns.

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Transport processes in the sorption of colored ions by peat particles

Cited by 199 publications

References 5 publications

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Equilibrium and kinetic analysis of phosphorus adsorption from aqueous solution using waste alum sludge

Adsorption of carmoisine A from wastewater using waste materials—Bottom ash and deoiled soya

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