The sorption of cationic dyes onto kaolin: Kinetic, isotherm and thermodynamic studies

Tehrani‐Bagha, Ali Reza; Nikkar, H.; Mahmoodi, Niyaz Mohammad; Markazi, M.; Menger, Fredric M.

doi:10.1016/j.desal.2010.08.036

Cited by 181 publications

(58 citation statements)

References 43 publications

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“…Similar results were found for methylene blue adsorption onto montmorillonite , methylene blue and crystal violet adsorption onto palygorskite (Al-Futaisi et al, 2007), basic yellow 28, methylene blue, and malachite green adsorption onto Iranian kaolin, (Tehrani-Bagha et al, 2011) and methylene blue and methyl violet adsorption onto sepiolite (Dogan et al, 2007). The results also indicated that an intra-particle diffusion mechanism played a significant role in the adsorption process, while the adsorption rate was controlled by a film-diffusion step (Ugurlu and Karaoglu, 2011;Yousef et al, 2011).…”

Section: Adsorption Kinetic Modelssupporting

confidence: 73%

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Fìl

Yılmaz

Bayar

et al. 2014

Braz. J. Chem. Eng.

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-In this study, color removal by absorption from synthetically prepared wastewater was investigated using montmorillonite clay by adsorption. As dyestuff Astrazon Red Violet 3RN (Basic Violet 16) was used. Experimental parameters selected were pH, temperature, agitation speed, initial dyestuff concentration, adsorbent dosage and ionic strength. It was established that adsorption rate increased with increasing pH, temperature, dye concentration and agitation speed, but decreased with increased ionic strength and adsorbent dosage. Adsorption equilibrium data obtained by a series of experiments carried out in a water bath were employed with common isotherm equations such as Langmuir, Freundlich, Temkin, Elovich and Dubinin-Radushkevich. It was found that the Langmuir equation appears to fit the equilibrium data better than the other models. Furthermore, the fit of the kinetic data to common kinetic models such as the pseudofirst-order, second-order, Elovich and intraparticle diffusion models was tested to elucidate the adsorption mechanism. Kinetic data conformed to the pseudo-second-order model, indicating chemisorptions. In addition, the thermodynamic parameters activation energy, Ea, enthalpy ΔH*, entropy, ΔS*, and free energy change, ΔG*, were calculated. The values of the calculated parameters indicated that physical adsorption of ARV on the clay was dominant and that the adsorption process was endothermic.

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Section: Adsorption Kinetic Modelssupporting

confidence: 73%

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Fìl

Yılmaz

Bayar

et al. 2014

Braz. J. Chem. Eng.

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“…For example, in an early study by Brownawell et al, the adsorption of the cationic surfactant dodecylpyridinium (DP) to kaolinite clay under varied solution conditions (pH, background electrolyte and dodecylpyridinium concentration) was found to be directly proportional to solution pH [5]. A similar observation was made in studies of paraquat [22] and methylene blue [23] dye sorption onto kaolinite.…”

Section: Ph Effectssupporting

confidence: 50%

“…Thus, cation sorption is expected to occur and increase with initial solution pH for values in excess of the PZC. This has been observed in numerous studies of cation absorption to kaolinite [5,22,23]. For example, in an early study by Brownawell et al, the adsorption of the cationic surfactant dodecylpyridinium (DP) to kaolinite clay under varied solution conditions (pH, background electrolyte and dodecylpyridinium concentration) was found to be directly proportional to solution pH [5].…”

Section: Ph Effectsmentioning

confidence: 86%

Sorption of Denatonium to Kaolinite Clay from Water

Crosson¹,

Thorpe²,

Zhou³

et al. 2013

JEP

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Denatonium benzoate is an aversive agent proposed for use in certain anti-freeze formulations to reduce poisoning events of pets and humans. Unfortunately, the sorption properties of denatonium cations to soil and/or soil components have not been investigated. In this paper, denatonium sorption to reference kaolinite clay under varied pH, ionic strength, and cation identity is described. The data clearly indicate that the nature of the background electrolyte cation modulates denatonium sorption with enhanced sorption occurring the presence of potassium ions versus minimal sorption occurring in a calcium chloride electrolyte at each pH studied as estimated using Dubinin-Raduskevich (D-R) isotherms. The effect of background electrolyte concentration on sorption was consistent with an ion-exchange process wherein the sorption capacity increased with decreased background electrolyte concentration. An interesting and unexpected observation of increased sorption capacity (estimated using the D-R model) with decreasing pH was observed in 10 mM CaCl 2 in contrast to an observed and expected increase in denatonium sorption to kaolinite in the presence of either of 10 mM NaCl or 10 mM KCl. Estimates of the mean sorption energy using D-R isotherms ranging from 2.65 kJ/mol in 10 mM CaCl 2 at pH 4 to 4.68 kJ/mol at pH 10 suggesting that the sorption process is not exclusively ion-exchange.

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“…(1) elektroliti mogu da neutrališu površinska naelektrisanja na sorbentima, takmičedi se sa molekulima boje za sorpciju na površini, pa zbog zaklonjenosti naelektrisanja na površini sa povedanjem jonske jačine, sorpcioni kapacitet opada [208]; (2) elektroliti mogu da smanje stepen disocijacije molekula boje i pospeše njihovu sorpciju [209];…”

Section: Vrsta Boje Rastvorljivostunclassified

“…Došli su do zaključka da je reč o spontanoj, endotermnoj fizisorpciji, koja prati kinetiku pseudodrugog reda i može da se opiše Langmuir-ovim modelom. Takođe su utvrdili da je efikasnost sorpcije najveda na pH7 i da opada sa 90% na 60% sa povedanjem početne koncentracije boje od 10 ppm na 40 ppm [209]. Nekoliko autora se bavilo i problemom kooperativno-kompetitivnog uklanjanja boje BY28 sorpcijom iz vodenih smeša sa nekim drugim jedinjenjima i bojama [211].…”

Section: Vrsta Boje Rastvorljivostunclassified

Synthesis and properties of methacrylic acid based hydrogels modified with zeolites

Panic¹

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The sorption of cationic dyes onto kaolin: Kinetic, isotherm and thermodynamic studies

Cited by 181 publications

References 43 publications

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Investigation of adsorption of the dyestuff astrazon red violet 3rn (basic violet 16) on montmorillonite clay

Sorption of Denatonium to Kaolinite Clay from Water

Synthesis and properties of methacrylic acid based hydrogels modified with zeolites

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