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3 results on '"Ileana Mitiu"'

1. Study on the Recycling of Borate Silicate Vitreous Waste with Capitalization of Heavy Metals Sludge

Author

Bogdan Alexandru Sava, Adriana Diaconu, Ovidiu Dumitrescu, Elisabeta Rosu, Ileana Mitiu, Mihai Eftimie, Dorel Radu, and Luminita Daniela Ursu

Subjects
Waste treatment, Materials science, Waste management, Mobile incinerator, General Engineering, Environmental engineering, Heavy metals, Raw material, Directive, Refuse-derived fuel, Capitalization
Abstract

The paper follows both the national preservation and durable managing policy, as well as the European laws for the area of environmental protection (UE’s Directive 1999/31/EC – „landfill of waste” an the Council’s Directive no. 94/62/CE regarding the packaging and the packaging waste, amended by the Council’s Directive no. 2004/12/CE). The proposed technologies lead to reducing the need of both raw materials and energy in the process of obtaining various types of glass. The study proposes new ways of retrieving and eliminating waste that contains heavy metals alongside borosilicate shards. This paper also aims to increase the responsibility of the waste generating companies and to make the potential users more sensible.

Published
2008
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2. A Study of the Industrial Waste Incorporating in Glass

Author

Lucica Boroica, Adriana Diaconu, Mihai Dinulescu, Bogdan Alexandru Sava, Dorel Radu, Ileana Mitiu, Luminita Daniela Ursu, Elisabeta Rosu, and Mihai Eftimie

Subjects
Viscosity, Chromium, Materials science, Colored, chemistry, Metallurgy, General Engineering, chemistry.chemical_element, Heavy metals, Industrial waste, Thermal expansion
Abstract

The paper presents a study of the industrial waste incorporating in glass in order to obtain decorative colored glasses. The influence of iron and chromium oxides from waste amount is discussed. The samples properties such as density, thermal expansion coefficient and viscosity are investigated. Including different oxides of heavy metals (obtained from sludge that contains chromium and iron) into the vitreous system leads to the obtaining of several decorative glasses. Their colour varies widely, to the added quantity and the atmosphere of the work place.

Published
2008
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3. Selective Recovery by Solubilization of Metals Ions of Chromium, Iron and Zinc from Electroplating Sludge to Develop Pigments for Ceramics Industry

Author

Maria-Iuliana MĂRCUȘ, Maria VLAD, Ileana MÎȚIU, and Mihaela Andreea MÎȚIU

Subjects
electroplating sludge, chromium, iron, zinc, selective recovery, Mining engineering. Metallurgy, TN1-997
Abstract

Electroplating industries discharge large amounts of heavy metals, including chromium (Cr), iron (Fe) and zinc (Zn) ions, in the wastewater resulted from technological processes, as well as in the sludge from wastewater treatment. In this paper are reported the results of the scientific activity developed in laboratory to recover Cr(VI,III), Fe(III), and Zn(II) from the galvanic sludge by selective solubilization and to obtain metal salts which can afterwards be used as pigments in ceramics industry. Chromium recovery from the sludge was performed by alkaline sludge oxidation to obtain salts of Cr(VI). We aimed at obtaining two types of pigments based on chromium: chromium yellow pigments by precipitation of Cr(VI) in the form of lead chromate (PbCrO4) and chromium green pigments by reducing Cr(VI) and its precipitation in the form of Cr(III). Red pigment based on Fe(III) was obtained by solubilizing the resulting sludge after the recovery of chromium and iron precipitation at a pH corresponding to the complete precipitation. From the remaining solution by recovering Cr and Fe, Zn was recovered as zinc hydroxide [Zn(OH)2] that can be used as raw material in the ceramics industry. In the experiments performed at laboratory scale, optimal technological parameters were set for the selective recovery of the tested sludge metal ions.

Published
2015

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