Removal of lead ions from aqueous solution by the sugarcane bagasse

The objective of this work is the use of sugarcane bagasse (scb) for the removal of lead ions (pb2+) from aqueous solution. after realization of a reliable experimental protocol and giving reproducible results,the metal aqueous solutions are analyzed by the technique of the inductively coupled plasma-atomic emission spectrometry (icp-aes).the kinetic study at ph = 5.5,shows that the extraction equilibrium is reached after 35 min,and the process of extraction is expressed by the kinetic law of second order. the equilibrium time,the yield and the extraction capacity increase with the initial ph of the aqueous solution,the maximum extraction capacity of pb2+ per the scb is about 3.32 mg/g. in the operating conditions used,a mass of 0.8 g of the scb is enough sufficient to purify a lead solution with 20 ppm.the treatment of a mixture of metals shows that the scb presents the sequence of following selectivity: pb2+ > cd2+ > zn2+ > cu2+ > co2+.