Surface mass transfer processes during colour removal from effluent using silica

McKay, Gordon; Otterburn, M. S.; Sweeney, Andrew G.

doi:10.1016/0043-1354(81)90036-1

Cited by 253 publications

(148 citation statements)

References 9 publications

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“…[38] The schematic illustration of the single-stage batch adsorption process is indicated in Figure 7. The treated solution contains V (L of water) and the dye concentration is reduced from C 0 to C e during the adsorption.…”

Section: Single-stage Batch Adsorbermentioning

confidence: 99%

Adsorption of Methylene Blue from Aqueous Solution on High Lime Fly Ash: Kinetic, Equilibrium, and Thermodynamic Studies

Keleşoğlu

Kes

Sütçü

et al. 2012

Journal of Dispersion Science and Technology

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Kinetic, equilibrium, and thermodynamic studies were performed for the batch adsorption of methylene blue (MB) on the high lime fly ash as a low cost adsorbent material. The studied operating variables were adsorbent amount, contact time, dye concentration, and temperature. The kinetic data were analyzed using the pseudo-first order and pseudo-second order kinetic models and the adsorption kinetic was followed well by the pseudo-second order kinetic model. The equilibrium data were fitted with the Freundlich, Langmuir, and Dubinin Radushkevich (D-R) isotherms and the equilibrium data were found to be well represented by the Freundlich and D-R isotherms. Based on these two isotherms MB is taken by chemical ion exchange and active sites on the high lime fly ash have different affinities to MB molecules. Various thermodynamic parameters such as enthalpy of adsorption (DH ), free energy change (DG ), and entropy change (DS ) were investigated. The positive value of DH and negative value of DG indicate that the adsorption is endothermic and spontaneous. The positive value of DS shows the increased randomness at the solid-liquid interface during the adsorption. A single-stage batch adsorber was also designed based on the Freundlich isotherm for the removal of MB by the high lime fly ash.

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Section: Single-stage Batch Adsorbermentioning

confidence: 99%

Adsorption of Methylene Blue from Aqueous Solution on High Lime Fly Ash: Kinetic, Equilibrium, and Thermodynamic Studies

Keleşoğlu

Kes

Sütçü

et al. 2012

Journal of Dispersion Science and Technology

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“…Considering both volume-discharged and effluent combustion, the wastewater from the textile industry is rated as the most polluting among all industrial sectors (McKay et al, 1981). Their presence in water, even at very low concentrations, is highly visible and undesirable and may significantly affect photosynthetic activity in aquatic life due to reduced light penetration (Aslıhan Gücek et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Removal of Methylene Blue From Aqueous Solution Using Ghassoul, a Low-Cost Adsorbent

Elass¹

2010

Appl Ecol Env Res

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Abstract. The present study examined the use of ghassoul, natural clay available in large quantities under the Atlas Mountains in Morocco, for the removal of the basic dye, methylene blue, from aqueous solutions. The effect of initial dye concentrations, agitation time, pH and temperature on adsorption capacities of methylene blue was investigated. The initial pH of the aqueous solution and the change of temperature (25-55 °C) were found to have little effect on the adsorption process. The adsorption was a rapid with 90-99% of the dye removed within the first 10-20 min. The adsorption kinetics are described successfully using a pseudo-second order rate equation and the rate constant decreases with increasing the initial concentration of MB. Experimental and calculated kinetic data for equilibrium are well expressed by Langmuir isotherm. The equilibrium adsorption capacity of ghassoul was determined with the Langmuir equation as well as the pseudo-second-order rate equation and found to be >290 mg dye per gram of the adsorbent. The results indicate that ghassoul could be employed as a low cost alternative to commercial activated carbon in wastewater treatment for the removal of colour and dyes.

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“…This indicates that the adsorption of Zn(II) ions onto the SMSP is a multilayer adsorption process. The parameter, 1/n, in the Freundlich model is related to the intensity of adsorption, and the values of n in the range of 1-10 showed favourable adsorption process 10 . Table 1 Table 2.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Adsorption of Zn(II) ions from aqueous environment by surface modified Strychnos potatorum seeds, a low cost adsorbent

Kumar¹

2013

Polish Journal of Chemical Technology

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The surface modifi ed Strychnos potatorum seeds (SMSP), an agricultural waste has been developed into an effective adsorbent for the removal of Zn(II) ions from aqueous environment. The Freundlich model provided a better fi t with the experimental data than the Langmuir model as revealed by a high coeffi cient of determination values and low error values. The kinetics data fi tted well into the pseudo-second order model with the coeffi cient of determination values greater than 0.99. The infl uence of particle diffusion and fi lm diffusion in the adsorption process was tested by fi tting the experimental data with intraparticle diffusion, Boyd kinetic and Shrinking core models. Desorption experiments were conducted to explore the feasibility of regenerating the spent adsorbent and the adsorbed Zn(II) ions from spent SMSP was desorbed using 0.3 M HCl with the effi ciency of 93.58%. The results of the present study indicates that the SMSP can be successfully employed for the removal of Zn(II) ions from aqueous environment.

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Surface mass transfer processes during colour removal from effluent using silica

Cited by 253 publications

References 9 publications

Adsorption of Methylene Blue from Aqueous Solution on High Lime Fly Ash: Kinetic, Equilibrium, and Thermodynamic Studies

Adsorption of Methylene Blue from Aqueous Solution on High Lime Fly Ash: Kinetic, Equilibrium, and Thermodynamic Studies

Removal of Methylene Blue From Aqueous Solution Using Ghassoul, a Low-Cost Adsorbent

Adsorption of Zn(II) ions from aqueous environment by surface modified Strychnos potatorum seeds, a low cost adsorbent

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