الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 182 |  |  |
| | | from | 182 | | |
Abstract
In this work, two types of polymer inclusion membranes were prepared for selective transport of metals ions. The first type of polymer inclusion membranes (PIMs) containing amides derived from 4-amino-1,5-dimethyl-2-phenylpyrazolidin-3-one and fatty acids as ions carriers, cellulose triacetate (CTA) as base polymer and dioctyl phthalate (DOP) as the plasticizer provide an attractive alternative to conventional solvent extraction methods for the separation of Cu(II), Co(II), Cd(II) and Ni(II) ions. The results showed that Cu(II) can be effectively recovered from aqueous acidic chloride solutions containing Co(II), Cd(II) and Ni(II) ions in hydrometallurgical process of transport across the PIMs with amides. The copper(II) ions were transported with a highest rate and the selectivity order was as follows: Cu(II) > Co(II) > Cd(II) > Ni(II). The initial flux of copper(II) transport increased with different amides carriers in the order carrier (N-PYDA)< carrier (N-PYTA)< carrier (N-PYPA)< carrier (N-PYSA). The PIM containing amides with different fatty chain influenced the rate of transport of copper, cobalt, cadmium and nickel ions, which length of alkyl fatty chain increased the rate of transport increased. The highest flux of copper(II) ions was obtained by transport through the PIM containing 40 wt.% carrier, 20 wt.% DOP and 40 wt.% CTA. The obtained results showed that recovery of Cu(II) ions reached to 90 % into 3.0 M hydrochloric acid as the receiving phase after 7 hrs using carrier (N-PYSA). Finally, the developed in this work system can be useful for recovery of Cu(II) from acidic aqueous solutions containing Co(II), Cd(II) and Ni(II) ions.
The second type of polymer inclusion membranes (PIMs) containing Schiff bases derived from octadecylamine with different aldehydes as ion carriers, cellulose triacetate (CTA) as base polymer and dioctyl phthalate (DOP) as the plasticizer provide an attractive alternative to conventional.