Application of AlMCM-41 for competitive adsorption of methylene blue and rhodamine B: Thermodynamic and kinetic studies

Eftekhari, S.; Habibi‐Yangjeh, Aziz; Sohrabnezhad, Sh.

doi:10.1016/j.jhazmat.2010.01.086

Cited by 178 publications

(116 citation statements)

References 33 publications

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“…There is also the possibility that a secondary pollution problem will arise because of the excessive use of chemicals (Slokar and Majcen Le Marechal 1998;Robinson et al 2001;Demirbas 2009;Huang et al 2011a). Adsorption is globally recognized as the most promising method of wastewater treatment because of its versatility, wide applicability and low cost (Demirbas 2009;Weng et al 2009;Eftekhari et al 2010;Huang et al 2011b). Most adsorbents are easily available and inexpensive.…”

Section: Methods Of Treatment For Removing Dyesmentioning

confidence: 99%

Review of the use of mesoporous silicas for removing dye from textile wastewater

Salahshoor

Shahbazi

2014

European Journal of Environmental Sciences

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The textile industry is a major user of dyes and hence an important source of water pollution, which poses a threat to aquatic as well as human life. Adsorption is a widely used technique for separating and removing dye from wastewater. Recently the use of mesoporous silica (MPSs) as an adsorbent in wastewater treatment has received considerable attention. MPSs are emerging as potential adsorbents because of their surface area, tunable and uniform pore structure, high pore volume, ordered pore structure, thermal and mechanical stability, and extraordinarily wide possibilities for functionalization to increase their adsorption capacity. In this paper the ability of MPSs to absorb dyes from aqueous solutions is reviewed. This article provides information on adsorption studies carried out under different operational conditions such as contact time, solution pH, temperature, agitation speed, etc. This review also summarizes and attempts to compare the equilibrium isotherm and kinetic models, and the thermodynamic studies that report the adsorption of dyes onto MPSs. The literature reviewed, indicate that SBA-MPSs have a higher adsorption capacity than MCM-MPSs and functionalized MPSs a better adsorption capacity than MPSs. It is evident from the literature that the potential of MPS based nano-sorbents being used for removing dyes from aqueous solution is very high. However, still more research work is needed on developing cost effective and more efficient MPS based nano-sorbents for use commercially.

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Section: Methods Of Treatment For Removing Dyesmentioning

confidence: 99%

Review of the use of mesoporous silicas for removing dye from textile wastewater

Salahshoor

Shahbazi

2014

European Journal of Environmental Sciences

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“…Using the adsorption rate equation (3) proposed on the competitive adsorption, some binary adsorption experiment data [60][61][62] were kinetically reevaluated.…”

Section: The Comparison Of Kinetic Parameters On Competitive Adsorptionmentioning

confidence: 99%

“…Original kinetic parameters and ones reevaluated by equation (3) on the binary adsorption of MB and RB onto AlMCM-41 60 at two temperatures were shown in Table 4. As shown in Table 4, it can be seen that the adsorption rate o f MB is 4.77 times faster than RB at 25˚C and 3.48 times at 40˚C, furthermore, the adsorption rate of MB decreases and is retarded by RB in competitive adsorption with increasing temperature.…”

Section: The Comparison Of Kinetic Parameters On Competitive Adsorptionmentioning

confidence: 99%

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A New Adsorption Rate Equation in Batch Systems

Hong¹,

Sin²,

Pak³

et al. 2018

Preprint

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In this paper, the deficiencies and cause of previous adsorption kinetic models were revealed, ne w adsorption rate equation has been proposed and its validities were verified by kinetic analysis of various experimental data. This work is a new vie w on the adsorption kinetics rather than a comment on the previous adsorption papers.Many adsorption kinetic models had been proposed and used during about 120 years. The frequently used and recently established 28 models 1-31 were listed in Table S1. The development of adsorption kinetic model has been conducted to obtain the specific models that agree better with the experimental data, as the result, dozens of kinetic models were established. The most of them were based on the Lagergren model 1 (in 1898) and Langmuir kinetic model 24 (in 1918), there were no innovative development. The Deficiencies and Cause of Previous Adsorption Kinetic ModelsCan those be used for the calculation of activation e nergy? One of the important objectives of kinetic study is to evaluate activation energy. Activation energy is the energy which must be available to a chemical system with potential reactants to result in a reaction. Activation energy is obtained by Arrhenius equation and the rate constants of different temperature.Activation energy can't be evaluated by the many of previous adsorption kinetic models, such as the pseudo-order models [1][2][3][4][12][13][14][15] and its changed types [5][6][7][8][20][21][22][23] . These models involve the adsorption amount q e (No. 1-9 and No. 13-21 in Table S1). When Arrhenius equation is used to calculate activation energy, the rate constants must be a constant at given temperature. However, not only the

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“…The data obtained in this experimental work, did not fit well for the first order model. The linear form of the second -order kinetic model is represented as follows [25]: where qe and qt are the adsorption capacities at equilibrium and time t respectively and k2 is the second order rate constant for adsorption ((mg/L) -1 min -1 ). The rate constant k2 and qe were computed respectively from the intercept and slope of the linear plot of t/qt vs. t (Fig 9).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Activated Carbon from Fenugreek Seed: Characterization and Adsorption Properties for Dye removal

Basrur

Bhat

2017

IJEE

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In this work, the preparation of activated carbons from agricultural product, the fenugreek seeds by two approaches, chemical and microwave activation methods were studied. The characterization of carbon materials were carried out using different techniques such as Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Thermo Gravimetric Analysis (TGA), X-Ray Diffraction (XRD). Adsorption experiment was carried out for the adsorption of two different basic dyes, Methylene Blue (MB) and Crystal Violet (CV) under varying conditions such as concentration, agitation time and temperature. The data acquired from concentration variation were found to fit well with Langmuir and also Freundlich isotherms. Kinetic studies revealed the fact that the system followed second order adsorption rate. Thermodynamic parameters such as ΔH ≠ , ΔS ≠ and ΔG ≠ were calculated from the obtained data on adsorption at different temperature.

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Application of AlMCM-41 for competitive adsorption of methylene blue and rhodamine B: Thermodynamic and kinetic studies

Cited by 178 publications

References 33 publications

Review of the use of mesoporous silicas for removing dye from textile wastewater

Review of the use of mesoporous silicas for removing dye from textile wastewater

A New Adsorption Rate Equation in Batch Systems

Activated Carbon from Fenugreek Seed: Characterization and Adsorption Properties for Dye removal

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