The adsorption of Pb2+ was carried out onto composite in aqueous solution via varying pH, contact time, and its initial concentration. The experimental adsorption data fitted well into Freundlich adsorption isotherm model (R2 ~ ). | Journal of Science and Technology 55 (1) (2017) 54-63 DOI: REMOVAL OF Pb2+ FROM AQUEOUS SOLUTION BY ADSORPTION ONTO COMPOSITE BASED ON EUCALYPTUS LEAF AND POLYANILINE Le Cao The1, Vu Minh Tan2, Phan Thi Binh3, * 1 Center for Monitoring of Hanoi Environmental Resources, Department of Hanoi Environmental resource, 36A Pham Van Dong, Bac Tu Liem, Hanoi 2 3 Hanoi University of Industry, Minh Khai, Bac Tu Liem, Hanoi Institute of Chemistry, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay, Hanoi * Email: Phanthibinh@ Received: 26 May 2016; Accepted for publication: 1 October 2016 ABSTRACT Composite based on eucalyptus leaf and polyaniline (EL-PANi) was prepared by chemical polymerization method. It showed that the function groups belonging to polyaniline and eucalyptus leaf were found through IR analysis and the nanostructure of composite was explained by SEM images. The adsorption of Pb2+ was carried out onto composite in aqueous solution via varying pH, contact time, and its initial concentration. The experimental adsorption data fitted well into Freundlich adsorption isotherm model (R2 ~ ). The adsorption process followed pseudo-second order kinetic with R2 ~ 1. The maximum adsorption capacity qmax of Pb2+ onto that composite was mg/g by Langmuir equation and Freundlich constant KF was mg/g by Freundlich one. Keywords: EL-PANi composite, adsorption isotherms, adsorption kinetics, Pb2+ ion adsorption. 1. INTRODUCTION Removal of heavy metal ions from aqueous solution has been regarding intensively by scientists on the world because of human health was damaged by pollution from many industrial branches such as metallurgy, electroplating, trade village and so on. All of them are resulting to critical environmental pollution in air or groundwater due to heavy metals among them lead belongs to a group of very toxic [1]. Because lead poisoning can lead to many serious diseases difficult to
