Indian Journal of Chemical Technology, Vol.12, No.4, 436-440, 2005
Removal and recovery of lead from aqueous solution using supported liquid membrane
A laboratory study was conducted to remove and recover lead from aqueous solution using supported liquid membrane (SLM) process. Preliminary solvent extraction studies, on lead revealed the iodo system with tributyl phosphate (TBP) as liquid membrane and sodium hydroxide as strippant to be an efficient one. Using synthetic lead(II) solution, the process parameters like feed side pH, strippant concentration, KI concentration and stirring speed were optimized. The initial lead concentration of 25 mg/L gave satisfactory result with complete removal and recovery in 4 h of operation with a permeability coefficient of 1.146 x 10(-5) m/s.