European Journal of Chemistry 2010, 1(2), 76-82 | doi: | Get rights and content


Flotation-separation of toxic metal ions from aqueous solutions using thiosemicarbazide derivatives as chelating agents and oleic acid as a surfactant

Shaban El-Sayed Ghazy (1,*) , Gaber Mohamed Abu El-Reash (2) , Ola Ahmed Al-Gammal (3) , Tarek Mohamed Yousef (4)

(1) Department of Chemistry, Faculty of ScienceMansoura University, Mansoura-35516, Egypt
(2) Department of Chemistry, Faculty of ScienceMansoura University, Mansoura-35516, Egypt
(3) Department of Chemistry, Faculty of ScienceMansoura University, Mansoura-35516, Egypt
(4) Department of Chemistry, Faculty of ScienceMansoura University, Mansoura-35516, Egypt
(*) Corresponding Author

Received: 10 Apr 2010 | Accepted: 03 May 2010 | Published: 15 Jun 2010 | Issue Date: June 2010


A simple and rapid procedure was developed for flotation-separation of toxic metal ions namely Hg2+, Mn2+ and Cd2+ from aqueous solutions. Thiosemicarbazide derivatives such as: 1-(amino-N-phenylmethanethio)-4-(pyridine-2-yl)thiosemicarbazide (H2PPS), N-phenyl-2-(pyridine-2-ylcarbamothioyl)hydrazinecarboxamide (H2PBO), 1-(amino(thioformyl)-N-phenylform)-4-(pyridine-2-yl)thiosemicarbazide (H2APO), and 1-(amino-N-(pyridine-3-yl) methanethio)-4-(pyridine-2-yl)thiosemicarbazide (H2PPY) have been used as organic chelating agents and oleic acid (HOL) as a surfactant. The different parameters affecting the flotation process namely, metal ion, ligands and surfactant concentrations, foreign ions (which are normally present in fresh and saline waters), pH and temperature are examined. About 100% of mercury, cadmium and manganese ions float at room temperature (~ 25 oC), at a metal:ligand ratio of 1:2  and at pH ~5. The procedure was successfully applied to recover Hg2+, Mn2+ and Cd2+ ions spiked into some water samples. The flotation mechanism is suggested based on some physical and chemical studies on the ligands and metal-complexes isolated from the floated layers.



Mercury; Manganese; Cadmium; Thiosemicabazide derivatives; Oleic acid; Natural water

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DOI: 10.5155/eurjchem.1.2.76-82.53

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Mansoura University, Faculty of Science, Chemistry Department, Egypt



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How to cite

Ghazy, S.; Abu El-Reash, G.; Al-Gammal, O.; Yousef, T. Eur. J. Chem. 2010, 1(2), 76-82. doi:10.5155/eurjchem.1.2.76-82.53
Ghazy, S.; Abu El-Reash, G.; Al-Gammal, O.; Yousef, T. Flotation-separation of toxic metal ions from aqueous solutions using thiosemicarbazide derivatives as chelating agents and oleic acid as a surfactant. Eur. J. Chem. 2010, 1(2), 76-82. doi:10.5155/eurjchem.1.2.76-82.53
Ghazy, S., Abu El-Reash, G., Al-Gammal, O., & Yousef, T. (2010). Flotation-separation of toxic metal ions from aqueous solutions using thiosemicarbazide derivatives as chelating agents and oleic acid as a surfactant. European Journal of Chemistry, 1(2), 76-82. doi:10.5155/eurjchem.1.2.76-82.53
Ghazy, Shaban, Gaber Mohamed Abu El-Reash, Ola Ahmed Al-Gammal, & Tarek Mohamed Yousef. "Flotation-separation of toxic metal ions from aqueous solutions using thiosemicarbazide derivatives as chelating agents and oleic acid as a surfactant." European Journal of Chemistry [Online], 1.2 (2010): 76-82. Web. 6 Aug. 2020
Ghazy, Shaban, Abu El-Reash, Gaber, Al-Gammal, Ola, AND Yousef, Tarek. "Flotation-separation of toxic metal ions from aqueous solutions using thiosemicarbazide derivatives as chelating agents and oleic acid as a surfactant" European Journal of Chemistry [Online], Volume 1 Number 2 (15 June 2010)

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