STUDY ON THE ADSORPTION OF Pb(II) IN AQUEOUS SOLUTION WITH MATERIAL BASED ON SULFONATED CARBON FROM SAWDUST

Abstract

In this paper, material based on sulfonated carbon is produced from
sawdust. Properties of material are characterized by methods including FT-IR,
BET, SEM and Acid-Base Titration. Surface area of the material is 423,4 m2/g,
total amount of center function (-OH, -COOH, -SO3H) and -SO3H is respectively
4,53 mmol.g-1 and 1.14 mmol.g-1. The adsorption of Pb2+ with sulfonated
carbon based material in aqueous solution is researched. The determined result
at appropriate pH condition of 4, the adsorption equilibrium time of 90 minutes.
Experimental data was analysized using two non–linear isotherm models:
Langmuir, Freundlich. The maximum adsorption capacity of Pb2+ was 4,228
mg/g by Langmuir equation and KF was 1,555 mg/g by Freundlich.