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Influence of temperature on mass transfer in an incomplete trapping single hollow fibre supported liquid membrane extraction of triazole fungicides |
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| Authors: | Monika Michel Luke Chimuka Ewa Cukrowska Bogus?aw Buszewski |
| Institution: | a Pesticide Residue Department, Plant Protection Institute, 20 W. W?gorka Str., 60-318 Poznan, Poland b Chair of Environmental Chemistry & Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarin Str., 87 100 Toruń, Poland c School of Chemistry, University of the Witwatersrand, P/Bag 3, WITS 2050, South Africa d Chair of Analytical and Ecological Chemistry, Faculty of Chemistry, Opole University, Pl. Kopernika 11, 45-040 Opole, Poland |
| Abstract: | The influence of temperature in a single hollow fibre supported liquid membrane extraction of triazole fungicides with a stagnant acceptor phase was investigated. The mass transfer parameters such as diffusion coefficient, flux and apparent viscosity were determined at temperature ranging from 278 K to 313 K. Increase in temperature led to an increase in diffusion coefficient and flux. The apparent viscosity also decreased with an increase in temperature. The degree of trapping in the acceptor phase influenced the mass transfer at higher temperature. At lower temperature, the transport of analytes from the donor solution through the donor-membrane interface and through the membrane mainly affected the transport of triazole fungicides. The effect of temperature in a single hollow fibre SLM extraction technique is therefore more pronounced where transport is donor controlled and/or membrane controlled. The partition coefficient of analytes from the acceptor solution to the membrane, KA was found to be much higher than that of from the donor solution to the membrane KD, thus least trapped triazole fungicides preferred to remain in the membrane even with an increased extraction temperature. |
| Keywords: | Triazines SLM Hollow fiber membrane Extraction technique |
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