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Influence of temperature on mass transfer in an incomplete trapping supported liquid membrane extraction of triazole fungicides
Author(s) -
Chimuka Luke,
Michel Monika,
Cukrowska Ewa,
Buszewski Boguslaw
Publication year - 2009
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200800611
Subject(s) - chemistry , mass transfer , acceptor , membrane , mass transfer coefficient , partition coefficient , analytical chemistry (journal) , extraction (chemistry) , diffusion , chromatography , thermodynamics , biochemistry , physics , condensed matter physics
The influence of temperature in a supported liquid membrane (SLM) extraction of triazole fungicides was investigated. The mass transfer parameters such as diffusion coefficient, flux and apparent viscosity were determined at temperatures ranging from 5 to 40°C. Increase in temperature led to an increase in diffusion coefficient and flux with a flowing acceptor solution. The apparent viscosity also decreased with an increase in temperature. However, the increase in mass transfer parameters did not result in an overall increase in extraction efficiency with a stagnant or circulation acceptor phase. Stripping of the analytes from the membrane into the acceptor phase as well as the configuration of the extraction unit could have limited the influence of temperature on mass transfer. The partition coefficient of analytes from the acceptor solution to the membrane, K A , was found to be much higher than that from the donor solution to the membrane K D , thus triazole compounds preferred to remain in the membrane even with an increased extraction temperature.