TAILIEUCHUNG - Removal of Ni 2+ from aqueous solution by adsorption onto maize tree-trunk polyaniline composite

The adsorption of Ni2+ was carried out onto composite in aqueous solution via varying pH, contact time and its initial concentration. The experimental adsorption data fitted into Freundlich adsorption isotherm model (r2 = ) better than into Langmuir one (r2 = ). The adsorption followed pseudo-second order kinetic model very well (r2 = ). The maximum adsorption capacity of that composite was mg/g which calculated from the pseudoLangmuir equation. | Vietnam Journal of Chemistry, International Edition, 54(4): 429-433, 2016 DOI: Removal of Ni2+ from aqueous solution by adsorption onto maize tree-trunk polyaniline composite Pham Viet Tien1, Mai Thi Thanh Thuy2, Nguyen Thi Van Anh2, Mai Thi Xuan2, Pham Thi Tot2, Le Cao The3, Phan Thi Binh2* 1 VQB Mineral and Trading Group Joint Stock Company 2 Institute of Chemistry, Vietnam Academy of Science and Technology 3 Center for Survey and Analysis of Environmental Resources, Environmental resource base Hanoi Received 23 May 2016; Accepted for publication 12 August 2016 Abstract Maize tree-trunk polyaniline composite was prepared by chemical polymerization method. Function groups belonging to materials were characterized by IR analysis and their morphological structure was examined by SEM image. The adsorption of Ni2+ was carried out onto composite in aqueous solution via varying pH, contact time and its initial concentration. The experimental adsorption data fitted into Freundlich adsorption isotherm model (r2 = ) better than into Langmuir one (r2 = ). The adsorption followed pseudo-second order kinetic model very well (r2 = ). The maximum adsorption capacity of that composite was mg/g which calculated from the pseudoLangmuir equation. Keywords. Maize tree-trunk polyaniline composite, removal of Ni2+, isotherm and kinetic adsorptions. 1. INTRODUCTION 2. EXPERIMENTAL Removal of heavy metal ions from aqueous solution has been regarding mostly by scientists because of human health on the world which is damaged by strongly developing many industrial branches such as metallurgy, electroplating and trade village. All of them are resulting to critical environmental pollution in air or groundwater. Ni2+ ion is one of the most toxic chemical agents, therefore, many methods as well as adsorbents were regarded to find out for removing it from wastewater [1-4]. Among them the adsorption method is economic and efficient

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