Buscar
Mostrando ítems 31-40 de 2693
Kinetics of Cr(III) and Cr(VI) removal from water by two floating macrophytes
(Taylor & Francis, 2016-10)
The aim of this work was to compare Cr(III) and Cr(VI) removal kinetics from water by Pistia stratiotes and Salvinia herzogii. The accumulation in plant tissues and the effects of both Cr forms on plant growth were also ...
Biological Cr(VI) removal coupled with biomass growth, biomass decay, and multiple substrate limitation
(Pergamon-Elsevier Science Ltd, 2011-05)
In this work, a mathematical model for the biological reduction of Cr(VI), carbon and nitrogen sources consumption, and biomass growth under fully aerobic conditions was developed. The model comprises three types of aerobic ...
ZrO2 thin film grafted on silica gel surface: Preparation and Cr(VI) adsorption property
(Soc Brasileira QuimicaSao PauloBrasil, 2002)
Determination of Cr(VI) and Cr(III) species in parenteral solutions using a nanostructured material packed-microcolumn and electrothermal atomic absorption spectrometry
(Elsevier Gmbh, 2009-07)
A sequential on-line preconcentration and separation system for Cr(VI) and Cr(III) species determination was developed in this work. For this purpose, a microcolumn filled with nanostructured α-alumina was used for on-line ...
Simultaneous bioremediation of Cr(VI) and lindane in soil by actinobacteria
(Elsevier, 2014-01)
Environments co-contaminated with metals and organic compounds are difficult to remediate. Actinobacteria is an important group of microorganisms found in soils, with high metabolic versatility and potential for bioremediation. ...
Biorremediación de Cr(VI) y lindano en suelos por actinobacterias: Selección de actinobacterias con mayor potencial para la biorremediación de suelos co-contaminados con Cr(VI) y lindano
(Editorial Académica Española, 2015)
El lindano es un plaguicida persistente y tóxico que, estando prohibido, aún se encuentra presente en el ambiente. El Cr(VI) es un metal pesado tóxico y mutagénico; se encuentra en suelos próximos a industrias. La ...
Sonochemical reduction of Cr(VI) in air in the presence of organic additives: What are the involved mechanistic pathways?
(Elsevier Science, 2018-11)
The sonochemical (850 kHz) reduction of Cr(VI) (0.3 mM, pH 2, reactor open to air) was analyzed in the presence of different additives. The effects on Cr(VI) reduction efficiency of added formic acid (FA, 10 mM), citric ...
Preventing Uranium(VI) redissolution in water after treatment with zerovalent iron nanoparticles by passivation with chromium(VI)
(Italian Association of Chemical Engineering, 2021-06)
It has been proved that nanoscale zerovalent iron (nZVI) is efficient for a fast removal of U(VI) in the absence of dissolved oxygen. However, the reoxygenation of the system leads to the re-release of U(VI) to the solution. ...