EQUILIBRIUM DISTRIBUTION OF PALLADIUM(I I) BETWEEN HYDROCHLORIC ACID SOLUTION AND A MACROMOLECULAR RESIN CONTAINING TRI-n-OCTYLAMINE

Sorption of Citric Acid from Aqueous Solutions by Macroporous Resins Containing a Tertiary Amine Equilibria

“…Although the extracted species in the EIR system may be less solvated than in an organic solvent (13), the mechanism of metal extraction with EIR is generally similar to that of solvent extraction, provided that the extractants are not chemically bonded to the polymeric matrix (13)(14)(15)(16)(17)(18).…”

“…The TOA content held in the EIR phase was determined from the amount of HC1 adsorbed by shaking the EIR with 0.1 mol/dm3 HC1 (18,19). In this work the concentrations of TOA and citric acid sorbed in the impregnated resins were expressed on the basis of the dry EIR.…”

“…A large amount of work on the sorption and separation of metals with EIR has been carried out (12-18). The impregnated extractants mainly include organophosphorus acids (12-16) and tertiary amines (17,18). The possibility of the application of EIR for the recovery and separation of metals has already been justified.…”

Influence of the support base on the sorption of Co(II) with mixed solvents

“…Also, some extractants as tri-octyl amine [15], quaternary ammonium salts [16] and hydroxy quinoline [17] have rarely been used. Silica gel, Amberlite XAD series and cellulose powder have been used as supporting materials in such techniques.…”

Palladium Recovery from Dilute Effluents using Biopolymer‐Immobilized Extractant

“…To reduce the impact of extractant loss, a number of immobilization processes have been developed including impregnation procedures (12,24), or encapsulation techniques (25 -27). In most cases impregnation procedures consist in the impregnation of a porous support with the extractant dissolved in an appropriate solvent followed by evaporation of the solvent: the extractant remains immobilized in the porous network of the resin (28 -30) or activated carbon (31).…”