Methylene Blue Dimerization does not Interfere in Surface-Area Measurements of Kaolinite and Soils
作者： Marcelo J Avena , Laura E Valenti , Valeria Pfaffen , Carlos P De Pauli
DOI: 10.1346/CCMN.2001.0490206
关键词:
摘要: Methylene blue (MB) was adsorbed from aqueous solutions onto a kaolinite and four soil samples to determine the effects of MB dimerization on measured surface area. Adsorption isotherms were prepared using adsorbing containing, respectively, 9, 46, 71, 83% molecules in dimeric state. Langmuir-type obtained each case. The results indicate that equilibration occurs quickly. aggregation state at does not depend initial solutions, but final equilibrium concentration MB. A comparison with specific area by adsorption ethylene glycol monoethyl ether indicates adsorbs as monomer, regardless number solution. This result owing strength monomer-surface monomer-monomer interactions. If interactions are favored, dimer monomeric form. may occur. visible spectra indicated present mixture species. These suggest dimers formed contact region between two aggregating particles.
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Arthur W. Adamson, Physical chemistry of surfaces ,(1960)
Rossella Brina, Achille De Battisti, Determination of the specific surface area of solids by means of adsorption data Journal of Chemical Education. ,vol. 64, pp. 175- ,(1987) , 10.1021/ED064P175
Roger Parsons, Fundamentals of interface and colloid science, volume II. Solid-liquid interfaces Journal of Electroanalytical Chemistry. ,vol. 421, pp. 225- 226 ,(1997) , 10.1016/S0022-0728(97)80106-4
C.P. Schulthess, D.K. Dey, Estimation of Langmuir Constants using Linear and Nonlinear Soil Science Society of America Journal. ,vol. 60, pp. 433- 442 ,(1996) , 10.2136/SSSAJ1996.03615995006000020014X
J. H. Potgieter, Adsorption of methylene blue on activated carbon: An experiment illustrating both the Langmuir and Freundlich isotherms Journal of Chemical Education. ,vol. 68, pp. 349- ,(1991) , 10.1021/ED068P349
L Margulies, H Rozen, S Nir, Model for Competitive Adsorption of Organic Cations on Clays Clays and Clay Minerals. ,vol. 36, pp. 270- 276 ,(1988) , 10.1346/CCMN.1988.0360309
L.K. Koopal, Inference of Polymer Adsorption from Electrical Double Layer Measurements : the Silver Iodide-Polyvinyl Alcohol System Veenman. ,(1978)
Giora Rytwo, Shlomo Nir, Leon Margulies, Blanca Casal, Jesus Merino, Eduardo Ruiz-Hitzky, Jose Maria Serratosa, Adsorption of Monovalent Organic Cations on Sepiolite: Experimental Results and Model Calculations Clays and Clay Minerals. ,vol. 46, pp. 340- 348 ,(1998) , 10.1346/CCMN.1998.0460313
Carlo Boutton, Martti Kauranen, Andre Persoons, Michael P Keung, Katrien Y Jacobs, Robert A Schoonheydt, Enhanced Second-Order Optical Nonlinearity of Dye Molecules Adsorbed onto Laponite Particles Clays and Clay Minerals. ,vol. 45, pp. 483- 485 ,(1997) , 10.1346/CCMN.1997.0450318
K. Bergmann, C. T. O'Konski, A SPECTROSCOPIC STUDY OF METHYLENE BLUE MONOMER, DIMER, AND COMPLEXES WITH MONTMORILLONITE The Journal of Physical Chemistry. ,vol. 67, pp. 2169- 2177 ,(1963) , 10.1021/J100804A048