Optimization, evaluation, and characterization of a hollow fiber supported liquid membrane for sampling and speciation of lead(II) from aqueous solutions
Por:
Bautista-Flores A.N., Miguel, ERD, de Gyves J., Jonsson, JA
Publicada:
1 nov 2010
Resumen:
Hollow fiber supported liquid membrane sampling and speciation of lead(II) from aqueous solution using a selective carrier (Kelex 100) is studied. An optimization of different variables affecting permeation performance (chemical conditions of the sampling module - pH, concentration and nature of the acceptor phase, extractant concentration; membrane impregnation form; sampling time; and hollow fiber length) and an evaluation of those that influence the performance of the device under sampling conditions (sample pH; interfering cations - Cu(II), Cr (VI), Co(II), Cd(II), Ni(II), and Zn(II); anions - NO(2)-, SO(4)(2-), Cl(-), NO(3)-, CO(3)(2-), CN(-) -, and organic matter - humic acids; lead concentration; and sample temperature) are reported. Kelex 100 concentration within the range 12-47 mmol dm(-3), acceptor solution pH 2.2, hollow fiber length within the range 15-100 cm, and impregnation using mode III were found as optimal conditions for operation of the device. A linear equation des
Filiaciones:
Bautista-Flores A.N.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Analit, Mexico City 04360, DF, Mexico
Miguel, ERD:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Analit, Mexico City 04360, DF, Mexico
de Gyves J.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Analit, Mexico City 04360, DF, Mexico
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