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Vol. 30 No. 8 (2018): Vol 30 Issue 8

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Removal of Hazardous Metal Ions by Newly Synthesized Polymers Bearing Thiourea Groups

https://doi.org/10.14233/ajchem.2018.21358
Hawra S. Rayshan
Department of Chemistry, College of Science, University of Mustansiriyah, Baghdad, Iraq *Corresponding author: E-mail: hamedjaffer3@uomustansiriyah.edu.iq; hamedjaffer3@yahoo.com
Hamed J. Jaffer*
Department of Chemistry, College of Science, University of Mustansiriyah, Baghdad, Iraq *Corresponding author: E-mail: hamedjaffer3@uomustansiriyah.edu.iq; hamedjaffer3@yahoo.com
Nabih M. Abdulnabi
Department of Chemistry, College of Science, University of Mustansiriyah, Baghdad, Iraq *Corresponding author: E-mail: hamedjaffer3@uomustansiriyah.edu.iq; hamedjaffer3@yahoo.com

Asian Journal of Chemistry, Vol. 30 No. 8 (2018): Vol 30 Issue 8

Abstract

Two new polymers were synthesized from the reaction of adipoyl isothiocyanate with aromatic amines, poly[N-(4¢-aminophenyl)amino]-carbonothioyl-N¢-thioformylhexanediamide] and poly[N-(4¢-aminobiphenyl-4-yl)amino]carbonothioyl-N¢-thioformylhexanediamide]. The synthesized polymers were characterized by FTIR, 1H and 13C NMR. They proved to be effective sorbent materials for the removal of some hazardous metal ions (Cu2+, Cd2+, Zn2+ and Co2+) from aqueous solutions. The study included the effect of different conditions on the adsorption efficiency such as contact time, initial metal ion concentration, pH and temperature of the solution. The adsorption isotherms could be fitted well Langmuir and Freundlich adsorption isotherms. Thermodynamic values of DHº and DSº revealed that the adsorption process was endothermic and accompanied by randomness at the solid-liquid interface. However, DGº values indicate that the adsorption process was a spontaneous, feasible process in most of the cases.

Keywords

Thiourea Adipoyl chloride Aromatic amines Adsorption Thermodynamic parameters.
S. Rayshan, H., J. Jaffer*, H., & M. Abdulnabi, N. (2018). Removal of Hazardous Metal Ions by Newly Synthesized Polymers Bearing Thiourea Groups. Asian Journal of Chemistry, 30(8), 1885–1891. https://doi.org/10.14233/ajchem.2018.21358
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