Progress of Cryogenics and Isotopes Separation

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The National Conference with international participation on New Cryogenic and Isotope Technologies for Energy and Environment - EnergEn 2018 is organized by the National Research-Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Valcea with the scientific participation of the University of Pitesti and the University of Craiova and will be held at Baile Govora, in 2018.

THE REMOVAL OF HEAVY METALS USING THE BULK LIQUID MEMBRANE TECHNIQUE Print

THE REMOVAL OF HEAVY METALS USING THE BULK LIQUID MEMBRANE TECHNIQUE

Cristina Monica Mirea, Ioana Diaconu*, Elena Ruse, Ecaterina Anca Serban, Dumitra Daniela Clej, George Alexandru Popa, Daniela Florentina Popa (Enache), Gheorghe Nechifor


University Politehnica of Bucharest, Department of Analytical Chemistry and Environmental Engineering, 1-3 Gh. Polizu Str., 011061, Bucharest, Romania

ABSTRACT

In recent years, heavy metal pollution has become a worldwide problem due to their high toxic potential and tendency to accumulate in the body. In the present paper was studied the possibility of removing heavy metals using the bulk liquid membrane technique,  which proved to be a useful tool in many applications of this type. The transport of a mixture of three metal cations (Mn (II), Fe (II) and Fe (III)) through the bulk liquid membrane was tested. The transport studies were carried out in the membrane system consisting of: the source phase - solution of Mn (II), Fe (II) and Fe (III) in hydrochloric acid medium, the membrane - solution of trioctylmethylammonium chloride (Aliquat 336) in chloroform, the receiving phase – solution of dilute hydrochloric acid. In optimal transport conditions, efficiencies of less than 10% for the removal of Mn (II), of less than 30% for Fe (II) and of about 90% for Fe (III) were obtained.

Keywords: heavy metals, iron, manganese, liquid membrane, bulk liquid membrane.