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Role of Cr(III) deposition during the photocatalytic transformation of hexavalent chromium and citric acid over commercial TiO2 samples
(Royal Society of Chemistry, 2016-02)
Removal of Cr(VI) and citric acid (Cit) by heterogeneous photocatalytic Cr(VI) transformation under UV light over two commercial TiO2 samples (1 g L−1), Evonik P25 and Hombikat UV100, was studied at pH 2 and Cr(VI) ...
About the performance of Sphaerotilus natans to reduce hexavalent chromium in batch and continuous reactors
(Elsevier Science, 2009-09)
The hexavalent chromium biological reduction constitutes a safe and economical detoxification procedure of wastewaters containing Cr(VI). However, little research has been done to evaluate Cr(VI) tolerance and reduction ...
On-line preconcentration and speciation analysis of Cr(III) and Cr(VI) using baker's yeast cells immobilised on controlled pore glass
(Elsevier B.V., 2005-08-08)
A study was undertaken to evaluate Saccharonzyces cerevisiae as a substrate for the biosorption of Cr(III) and Cr(VI) aiming to the selective determination of these species in aqueous solutions. The yeast cells were ...
On-line preconcentration and speciation analysis of Cr(III) and Cr(VI) using baker's yeast cells immobilised on controlled pore glass
(Elsevier B.V., 2005-08-08)
A study was undertaken to evaluate Saccharonzyces cerevisiae as a substrate for the biosorption of Cr(III) and Cr(VI) aiming to the selective determination of these species in aqueous solutions. The yeast cells were ...
Biotreatment of cr(VI)-containing wastewater mediated by indigenous bacteria
(Gheorghe Asachi Technical University of Iasi, 2018-11)
Indigenous Pseudomonas veronii 2E, Klebsiella oxytoca P2 and Klebsiella ornithinolityca 1P were tested as catalysts for the transformation of Cr(VI) to Cr(III) for Cr(VI)-containing wastewater biotreatments. The Cr(VI) ...
Effect of solution pH on the dynamic of biosorption of Cr(VI) by living plants of Salvinia minima
(Elsevier Science, 2015-01)
Salvinia minima is a widely distributed floating fern that bioaccumulates high concentrations of heavy metals and is a promising species for Cr(VI) removal from polluted waters. Metal bioaccumulation efficiency of aquatic ...
Remediação de águas subterrâneas contaminadas com cromo (VI) por meio de uso de turfa e lama vermelha
(Universidade Federal de São Paulo, 2015-07-13)
The contamination of aquifers by hexavalent chromium has been increasing in recent years, due to the intense industrial activity. The remediation of groundwater is based on conventional processes where Cr(VI) (highly toxic ...
Experimental Evidence in Favor of an Initial One-Electron-Transfer Process in the Heterogeneous Photocatalytic Reduction of Chromium(VI) over TiO 2
(American Chemical Society, 2001-06)
Direct evidence of the involvement of Cr(V) intermediacy in Cr(VI) heterogeneous photocatalytic reduction over TiO2 was obtained by EPR spectroscopy, in the presence and absence of ethylenediaminetetraacetic acid (EDTA). ...
Effect of different gases on the sonochemical Cr(VI) reduction in the presence of citric acid
(Pergamon-Elsevier Science Ltd, 2020-12)
The sonochemical (850 kHz) Cr(VI) reduction (0.30 mM, pH 2) in the presence of citric acid (Cit, 2 mM) was analyzed under different working atmospheres: reactor open to air without sparging (ROAWS), and Ar, O2, air and N2 ...
Sequential spectrophotometric determination of chromium(III) and chromium(VI) using flow injection analysis
(1985-12-01)
A flow injection analysis (FIA) procedure for the speciation of Cr(III) and Cr(VI) using the 1,5-diphenylcarbazide (DPC) method is presented. As Cr(III) does not interfere in the Cr(VI) - DPC reaction, both Cr(VI) and total ...