Immobilization behavior of methyl tert-butyl ether by cyclodextrins.
The immobilization behavior of methyl tert-butyl ether (MTBE) by various cyclodextrins (CDs) was studied. Although it has a low hydrophobic character and high polarity compared to other organics, MTBE was effectively immobilized by CDs. The immobilization isotherm was a type of Freundlich isotherm. The immobilization capacity of beta-CDs was the largest of the natural CDs. The initial apparent association constant for MTBE-CD complex follows the order: gamma = beta > methyl-beta > hydroxypropyl beta > alpha. The difference in these constants is related to the size of MTBE and CDs. The size of beta- and gamma-CD is large enough to encapsulate MTBE molecule into the cavity, which that of alpha-CD is too small to encapsulate MTBE.
Baek
Kitae
K
National Research Laboratory for Environmental Remediation, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, South Korea.
Yang
Jung-Seok
JS
Yang
Ji-Won
JW
D002273:Carcinogens / Q000032:analysis*; D003505:Cyclodextrins / Q000737:chemistry*; D008738:Methyl Ethers / Q000737:chemistry*; D014873:Water Pollutants / Q000032:analysis*
D002273:Carcinogens; D003505:Cyclodextrins; D008738:Methyl Ethers; D014873:Water Pollutants; C043243:methyl tert-butyl ether