Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5210742 | Reactive and Functional Polymers | 2008 | 11 Pages |
The focus of this investigation is the development of a solvent impregnated resin for phenol removal from dilute aqueous solutions. Using a solvent impregnated resin (SIR) eliminates the problem of emulsification encountered in liquid-liquid extraction. Impregnated MPP particles and impregnated XAD16 particles are successfully used for phenol extraction. Impregnated MPP particles are preferred, as impregnated XAD16 particles show less mechanical strength and are more expensive. Impregnated MPP particles perform better compared to other synthetic adsorbents and basic ion exchangers. The maximum phenol capacity of impregnated MPP particles with 0.99 mol Cyanex 923 kgâ1 SIR is 4.1 mol kgâ1 SIR (386 mg gâ1 SIR) and of MPP particles containing 1.47 mol Cyanex 923 kgâ1 SIR it is 5.08 mol kgâ1 SIR (478 mg gâ1 SIR). The regenerability of impregnated MPP particles is easy and complete, and the particles are stable during several cycles. The equilibrium constants for the extraction of phenol are determined as Kchem = 37 L molâ1 and Kphys = 18 (mol Lâ1) (mol Lâ1)â1. With these values the SIR isotherms can be satisfactorily described.The results indicate that SIR technology is a promising alternative for the conventional phenol removal technologies at low phenol concentration levels.