Papers by Author: M. Benamor

Abstract: Wet phase inversion is used to prepare and control morphology of membrane based on PEEKWC in DMA at 14wt %. A comparison study has been done with Polysulfone and PVDF as basic materials for membrane preparation. The effect of the coagulant bath is studied by using water and ethanol as nonsolvent. Excepting for PVDF, the micrographs shows that no strong effect in the structure of the membranes. The macro-voids still exist but less numerous and large in the case of membrane immersed in ethanol coagulant bath. Microporous membrane in some cases was obtained. These membranes were used in supported liquid membranes experiments for Ni(II) metal ions transports using 2-diethyl hexyl phosphoric acid (D2EHPA ) as carrier.

Abstract: A new chelating resin, pyrocatechol violet (PV) immobilised on Amberlite XAD-4 polymeric matrix, was prepared. The resulting chelating resin has been characterised by elemental analysis, infrared (IR) spectra and textural analysis (BET). The resin was used for the preconcentration of Zn (II) prior to its determination by flame atomic absorption spectrometry (AAS). The optimization of experimental conditions during the quantitative extraction of Zn (II) by the resin phase was performed using factorial design including pH, amount of resin, and contact time. The phase exchange kinetic studies performed of Zn (II) revealed that equal 40 min was sufficient for reaching equilibrium metal ion sorption. Sorption is quantitative in the pH range of 5 – 5.5 (recovery 98 – 99%).