Sorption of Pb2+, Co2+ and Cr2+ Using Cissus populnea Stem Bark Powder as Bio-Sorbent

Abstract

Sorption of Pb 2+ , Cd 2+ and Cr 2+ in aqueous solution using immobilized Cissus populnea stem bark powder as a bio-sorbent was studied. The maximum sorption capacity of ICPSB on Pb 2+ , Co 2+ and Cr 2+ are 94.20%, 88.19% and 78.97% respectively. Effect of concentration on the sorption capacity of ICPSB shows that sorption capacity increase with increase in concentration while effect of ionic strength curve shows that sorption capacity decrease with increase in ionic strength. Effect of time on sorption capacity of ICPSB was observed between 1-24 hours, it was observed that Pb 2+ recorded the maximum sorption compared with Co 2+ and Cr 2+ . Effect of pH was studied at pH range of 1.0-8.0. Optimal sorption was recorded at pH 8.0 for Pb 2+ . The result of this research has added to the use of a cheaper bio-sorbent i.e. immobilised Cissus populnea stem bark (ICPSB) for sorption of Pb 2+ , Co 2+ and Cr 2+ .

Assessment of alkalinity on the adsorption of cadmium ion using KOH-activated carbon from Sesame stem

“…A concentration of 200ppm of the aqueous Cadmium solution was prepared with distilled water from the above concentration, 50ml of the solution of metal ion was taken into a beaker, and 2 g activated carbon of sesame stem was added and then shaken vigorously for 1 hour using flask shaker. The mixture was filtered and the residual metal ion concentration is determine using AAS [4] [11].…”

“…2.0 g activated carbon sesame stem was added to the sample to 50 ml of the prepared solution and the equilibrium concentration of the residual metal ion was determined. It was shaken for 1 hour using flask shaker then the mixture was filtered and the residual metal ion concentration is determine using AAS [4]…”

“…Different sample consisting of 50 ml of the metal ion concentration from 10ppm, 20ppm, 40 ppm, 60 ppm, 100 ppm of cadmium ion, and each containing 2 g activated carbon sesame stem were prepared and shaken for 1 hour until equilibrium was obtain, the mixture was filtered and analyzed for residual metal ion concentration using AAS [4]…”

“…Another 50ml of 200ppm of the metals is taken and 2drops of HCl is added while the pH is determining, this is repeated by adding 3, 5, 7 and 9 drops of concentrated HCl and taking note of the pH. The solutions are filtered and analyzed for residual metal ion concentration using AAS [4] 3 Results and discussion…”