Cadmium ion (Cd+2) removal from produced water using ion technique: Amberlite IR-120H and modified amberlite IRA-400 Cl- resins

This study to characterizing the physical and chemical properties of the produced water in Nafoora field, Gulf Company in the Libyan, also, level of concentrations of selected heavy metals have been measured. To do that, different techniques have used. Results have showed pH, Conductivity, salinity, TDS, and turbidity levels were 6.2 ± 0.19; 1473 µS/cm; 1.8; 79000 mg/l; and 40± 4.18 NTU respectively. The levels of the anions ranged as follows: Cl- (15300 mg/l); NO3- (1 mg/l) and SO42- (120 mg/L). While the concentration of some ions metals were found as follows: K+ (1400 mg/l); Na+ (360000 mg/L) and Ca+2 (8570 mg/l). Some heavy metals were also estimated and found as follows: Cd (1.2 mg/l); Fe (3.1 mg/l); Cu (2.3 mg/l); Ni (0.3 mg/l) and Pb (0.1 mg/l). Ion exchange technique was used to remove the cadmium metal ion from produced water using Amberlite IR-120H and modified Amberlite IRA-400 Cl resins. Optimization pH, temperature and contact time using lame Atomic Absorption Spectrophotometer (AAS) approach for measuring the concentrations of Cd ion. Experiments showed that the Amberlite IR-120H resin has maximum removal efficiency for Cd at pH 7, 80 oC and 30 min respectively, while pH 7, 80 oC and 120 min are the most appropriate conditions for modified Amberlite IRA-400 Cl- resin. The results obtained show that the Amberlite IR 120 H as a strong cation-exchange resin has greater Cd removal ability (96.3%) and fast as compared to the modified Amberlite IRA-400 Cl- resin (73%).