Authors : A. B. Sahare, K. N. Puri
Page Nos : 1130-1138
Description :
Dried, powdered and chemically treated tree bark of Citrus limon has been used for the removal of Pb(II) metal ions from wastewater. The adsorption process was studied as a function of pH (2-9), contact time (0-120min), initial concentration (20-55mg/L), doses of bark (0.5 - 3g) & temperature (32-90ºC). It was observed that the pH has marked effect on Pb(II) uptake. Batch study shows that about 82% removal of Pb(II) takes place over the pH range of 6 – 7 and contact time of 1.5 hour at initial concentration of 20mg/L. The adsorption of Pb(II) is inversely related to the temperature. The results obtained in batch experiments were compared with that of Granular Activated Charcoal (GAC). The bark was found to be efficient media for removal of Pb(II) as compared to GAC in continuous mode. The column having 2cm diameter with bed depth of 30cm was used for the treatment of water containing Pb(II) separately at concentration 20mg/L and flow rate 9.5ml/min. The column parameter like adsorption at different time intervals was studied. 0.01N HNO3 solution was used for desorption of adsorption column and column regenerated using distilled water.
