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Heavy-metal extraction capability of chalcogenoic aminophosphines derived from 1-amino-4-methylpiperazine

Özlem Sarıöz, Yavuz Sürme, and Vefa Muradoğlu

Department of Chemistry, Faculty of Science-Arts, Nigde University, 51100, Nigde, Turkey



Abstract: Aminophosphine of the type (Ph2PNHR) derived from 1-amino-4-methylpiperazine and its chalcogen derivatives (Ph2P(X)NHR X = S, Se) were used as ligands in solvent extraction of metal picrates such as Cu2+, Ni2+, and Pb2+ from the aqueous to the organic phase. Influence of parameters such as pH of the aqueous phase, ligand concentration in the organic phase, and concentration of the extractant extracted from the aqueous to the organic phase was investigated to determine the ligands’ ability to extract metal ions. Metal picrate extraction was investigated at 25°C using UV-VIS spectrophotometry in dichloromethane in the absence and in the presence of Ph2PNHR and chalcogenides. The extraction results revealed that the extraction percentage of Cu2+, Ni2+, and Pb2+ metals was much higher at lower pH values, indicating an acidity dependent complexation equilibrium.

Keywords: aminophosphines – chalcogenides – extraction – heavy metals

Full paper is available at

DOI: 10.2478/s11696-013-0372-2


Chemical Papers 67 (10) 1345–1349 (2013)

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