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Removal of Chromium (VI) in Tannery Wastewater by Immobilized Technology
Bacillus cereus Chromium (VI) Immobilisation Tannery Wastewater
2011/12/21
Bacillus cereus was embedded in powdered activated carbon to prepare immobilized granule. Then, the granules was used to treat the Cr(VI) in tannery wastewater. The results showed the removal effect o...
In-situ chromium isotope measurement of chromium-rich fine grains in the Murchison CM2 chondrite
54-chromium isotopic anomaly presolar grain
2017/4/12
Isotopic anomalies of 54Cr have been reported in bulk chondrites. Stepwise dissolution experiments have suggested
the presence of a carrier of the 54Cr anomaly, probably of presolar origin. Although ...
Retention and Transport of Hexavalent Chromium in Calcareous Karst Soils
Hexavalent chromium calcareo
2009/7/7
Hexavalent chromium, which is a highly toxic and soluble form of the element chromium, is a common soil and groundwater contaminant found in many contaminated sites throughout the world and poses a s...
Hazardous Wastes Disposal: Stabilization/Solidification of Tannery Residue in the Presence of Chromium
Cement Chromium Clay Leaching Solidification Stabilisation Tannery Waste
2011/12/16
Disposal or reuse of hazardous waste is a major consideration in chemical manufacturing and processing. Waste residuals from the tannery industry can contain high levels of chromium. Considered as a h...
Reduction and Sorption of Chromium by Fe(II)-Bearing Phyllosilicates: Chemical Treatments and X-Ray Absorption Spectroscopy (XAS) Studies
Absorption Chromium EXAFS Phyllosilicates Reduction XANES
2011/12/6
Abstract: The reduction of hexavalent chromium species in aqueous solutions by interaction with Fe(II)-bearing solid surfaces was studied using a 0.96 × l0−3 M Cr(VI) solution and iron-rich clay...
Gallium and Chromium Substitution for Aluminum in Synthesized Beidellite
Beidellite Synthesis Chromium Gallium Isomorphous Substitution
2011/12/8
Abstract: The hydrothermal synthesis of Mg-beidellite in which limited amounts of Ga and Cr are clearly shown to be incorporated into nonexchangeable positions in the clay layer framework is reported ...
Morphology of Lead(II) and Chromium(III) Reaction Products on Phyllosilicate Surfaces as Determined by Atomic Force Microscopy
Atomic Force Microscopy Clay FTIR Geochemical Equilibrium Model Mica Remediation Smectite X-ray
2011/12/27
Abstract: Redox and acid-base reactions play important roles in the fate of metal contaminants in soils and sediments. The presence of significant amounts of Cr, Pb and other toxic heavy metals in con...
Centro de Tecnología de Recursos Minerales y Cerámica, Cno. Centenario y 506, CC 49 (1897) M.B. Gonnet Buenos Aires, Argentina. FAX 54-21-710075
Abstract: OH-Cr smectites were prepared with different...
Hydroxy-chromium solutions were prepared from chromium nitrate solutions by adding NaOH with OH/Cr = 2.The solutions were treated at 20°C and 60°C. The hydrolysis times were from 1 to 100 days. Polyme...
Pillared Clays Prepared from the Reaction of Chromium Acetate with Montmorillonite
Chromia Montmorillonite Pillaring
2011/12/29
Refluxing chromium (III) acetate with a Na+-montmorillonite suspension gives rise to the intercalation of linear Cr(III) polyhydroxo-acetate oligomers. Thermally stable chromia pillared montmorillonit...
Chromium-Bearing Dickite and Chromium-Bearing Kaolinite from Teslic, Yugoslavia
Chromium Dickite Infrared Kaolinite Optical absorption
2012/2/8
Three samples of bluish chromium-bearing dickite and chromium-bearing kaolinite were examined by X-ray powder diffraction, chemical analysis, electron microprobe, optical, and infrared techniques to d...
Hydrothermal Alteration of a Serpentinite Near Takovo, Yugoslavia, to Chromium-Bearing Illite/Smectite, Kaolinite, Tosudite, and Halloysite
Cr-halloysite Cr-illite/smectite Cr-kaolinite Cr-tosudite Hydrothermal Serpentinite
2012/2/9
Hydrothermal alteration products of serpentinite near Takovo, Yugoslavia, were studied by X-ray powder diffraction and chemical analysis. A zone of mainly blue clays adjacent to the hydrothermal vein ...
Adsorption of Cr(NH3)63+ and Cr(en)33+ on Clay Minerals and the Characterization of Chromium by X-Ray Photoelectron Spectroscopy
Adsorption Chlorite Chromium Complex ions Illite Kaolinite X-ray photoelectron spectroscopy
2012/2/9
The nature of Cr(NH3)63+ and Cr(en)33+(en = ethylenediamine) adsorbed on chlorite, illite, and kaolinite has been studied by X-ray photoelectron spectroscopy (XPS). The interaction of the chromium com...