Abstract
Adsorption rates and capacities of polyethylene glycol (PEG) were investigated for five montmorillonite clays. The adsorption of PEG for all the montmorillonite clays was rapid, and equilibrium was attained within 30 min. The adsorption isotherms of PEG for all the montmorillonites conformed to the Freundlich equation. The adsorption heats were 7.3 and 11.6 kJ · mol−1(mw.:2000), and 8.7 and 14.2 kJ · mol−1(mw.:20000) for the montmorillonite and the bentonite II-Ca, respectively. Adsorption capacities for all the clay samples approached constants for the molecular weight of PEG over 2000, though they increased with the increase of molecular weight under 2000. The adsorption capacities were slightly influenced by a nearly neutral pH. The montmorillonite clays which had different interlayer cations showed quite different adsorption capacities. The bentonite II-Ca, the acid clay, and the activated clay showed large adsorption capacities that were 30–50 % of that of an activated carbon.
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Walter JW, Thomas CV, Massoud P, Gary EH, Dory MU (1983) Water Res 17:1443
Parfitt RP, Greenland DJ (1970) Clay Miner 8:305
Caberry JB, Twardowski CJ, Eberhardt DK (1977) J Wat Pollut Control Fed 49:452
Narkis N, Ben-David B (1985) Water Res 19:815
Fushiwaki Y, Tanaka K, Urano K (1982) Jpn Journ of Wat Poll Res 5:151
Payne WJ (1963) Biotech Bioeng 5:355
Urano K, Saito M, Murata C (1984) Chemosphere 13:293
Urano K, Ikebe K, Yamauchi I (1984) Wat Tret Techn Jpn 25:125
Zhao X, Urano K, Ogasawara S (1989) Nippon Kagaku Kaishi No 2:209
Urano K, Koichi Y, Nakazawa Y (1981) J Colloid Interface Sci 81:477
Parfitt GD, Rochester CH (1983) Adsorption from Solution at the Solid/Liquid Interface. Academic Press, New York, p 7
Iwao S, Nagasawa K (1985) Nendo no Jiten. Asakura Shoten, Tokyo, p 97
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Zhao, X., Urano, K. & Ogasawara, S. Adsorption of polyethylene glycol from aqueous solution on montmorillonite clays. Colloid & Polymer Sci 267, 899–906 (1989). https://doi.org/10.1007/BF01410338
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DOI: https://doi.org/10.1007/BF01410338