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Shameran Jamal Salih 1 ,Rezhna Hassan Faraj1
1Department Of Chemistry, Faculty of Science and Health, Koya University, Kurdistan Region, Iraq.
Original: 21 August 2016, Revised: 10 October 2016, Accepted: 16 October 2016, Published online: 20 March 2017
DOI: https://doi.org/10.17656/jzs.10591
Abstract
The batch studies conducted in the present work provide significant information regarding the adsorption of Pb2+ onto Pistachio-Hard shell-grafted-Thiosemicarbazone acetophenone. The sorption kinetics, isotherms and thermodynamics of Pb2+ onto adsorbent surface modified thiosemicarbazone acetophenone has been assessed under various operation conditions such as contact time, initial concentration of Pb2+, pH of the solution, temperature and adsorbent dosage. The FT-IR results of Pistachio-Hard shell -grafted-Thiosemicarbazone acetophenone showed that biomass has different functional groups and these functional groups are able to graft with Pb2+ in aqueous solution. The removal process reached maximum which was 97.08%. Equilibrium data fitted well with Freundlich isotherm model (1/n<1). Also, Kinetic data were best described by the pseudo-second order model. Thermodynamic studies showed that sorption of Pb2+ions were endothermic, spontaneous, and feasible. Finally, the optimum dosage of the modified adsorbent was 0.165g for adsorption process at pH 5.
Key Words:
Schiff base
Adsorption Kinetics
Optimization
Removal
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