Panturu R.I.,Polytechnic University of Bucharest |
Jinescu G.,Polytechnic University of Bucharest |
Panturu E.,Research and Development National Institute for Metals and Radioactive Resources ICPMRR |
Filcenco-Olteanu A.,Research and Development National Institute for Metals and Radioactive Resources ICPMRR |
Radu D.A.,Research and Development National Institute for Metals and Radioactive Resources ICPMRR
Revista de Chimie | Year: 2011
The paper presents the research undertaken regarding the characterization and the testing of the absorption capacity of commercial Purolite ARSEN-X npresin, impregnated with iron nanoparticles which can be used to treat radioactive contaminated water (mine water) from uranium mining activities. The experimental study was realized in continuous flow system, and followed the determination of qualitative and quantitative influence of flow velocity through the layer, pH and amount of uranium in uranium feed solution, the process dynamics, using 200 cm3 (150g) Purolite ARSEN-X npresin placed in a laboratory column (50 cm in length, 10 cm in diameter). Using this material for permeable reactive barriers, might lead to an advanced decontamination (99%) of the mine water from uranium mining activities thus respecting environmental quality standards.
Scott T.B.,University of Bristol |
Popescu I.C.,Research and Development National Institute for Metals and Radioactive Resources ICPMRR |
Crane R.A.,University of Bristol |
Noubactep C.,University of Gottingen
Journal of Hazardous Materials | Year: 2011
Although contaminant removal from water using zero-valent iron nanoparticles (INP) has been investigated for a wide array of chemical pollutants, the majority of studies to date have only examined the reaction of INP in simple single-contaminant systems. Such systems fail to reproduce the complexity of environmental waters and consequently fail as environmental analogues due to numerous competitive reactions not being considered. Consequently there is a high demand for multi-elemental and site-specific studies to advance the design of INP treatment infrastructure. Here INP are investigated using batch reactor systems over a range of pH for the treatment of water containing multi-element contaminants specifically U, Cu, Cr and Mo, selected to provide site-specific analogues for leachants collected from the Lişava mine, near Oraviţa in South West Romania. Concurrently, a U-only solution was also analysed as a single-system for comparison.Results confirmed the suitability of nano-Fe0 as a highly efficient reactive material for the aqueous removal of CrIV, CuII and UVI over a range of pH applicable to environmental waters. Insufficient MoVI removal was observed at pH >5.7, suggesting that further studies were necessary to successfully deploy INP for the treatment of geochemically complex mine water effluents. Results also indicated that uranium removal in the multi-element system was less than for the comparator containing only uranium. © 2010 Elsevier B.V.