Kinetics of liquid-liquid membrane extraction of transition metal cations (Co2+, Ni2+, Cu2+ and Zn2+) using series of Sudan Azo Dyestuffs

Kinetics of extraction is an important parameter to determine rate of extraction of metal ions through ligands/ ionophores, in which the corresponding change in the concentration of metal ions in the membrane phase was determined with time. Kinetics of liquid-liquid membrane extraction studies of transition metal cations (Co2+, Ni2+, Cu2+ and Zn2+) using series of Sudan Azo Dyestuffs (Sudan-I, Sudan-III and Sudan-III) have been carried out at room temperature and rate of extraction were determined spectrophotometrically. Chloroform is used as Organic liquid membrane. From the results, it has been observed that during the process of extraction the performance of extraction increases as the time of extraction is increases and maximum extraction reached at particular time for particular metal ion and then decreases due to the back extraction process.