Kinetics and thermodynamic treatments of the reduction of hexavalent to trivalent chromium in presence of organic sulphide compounds

Kassem, Taher S.

doi:10.1016/j.desal.2010.03.011

Cited by 16 publications

(7 citation statements)

References 6 publications

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“…758,759 It is even considered to be a nontoxic essential trace metal in human nutrition (especially in glucose metabolism). 760,761 Therefore, it is of great importance to transform Cr(VI) into Cr(III) and fundamentally reduce its toxicity when porous carbons are used to adsorb Cr(VI) from contaminated water. 762 Actually, porous carbon can itself weakly reduce Cr(VI) to Cr(III) by redox reactions of its surface functional groups.…”

Section: Environmental Applicationsmentioning

confidence: 99%

Carbothermal synthesis of metal-functionalized nanostructures for energy and environmental applications

Shen

2015

J. Mater. Chem. A

226

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Section: Environmental Applicationsmentioning

confidence: 99%

Carbothermal synthesis of metal-functionalized nanostructures for energy and environmental applications

Shen

2015

J. Mater. Chem. A

226

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“…Hexavalent chromium ions are highly toxic to living organisms and are a source of environmental pollution. [38][39][40][41][42] Therefore, these ions must be removed from the solution before being discharged into the environment. Many studies have been performed on the removal of hexavalent chromium ions from water, [43][44][45][46][47][48] and many physico-chemical methods have been proposed, including precipitation, ion exchange, oxidationreduction, electrochemical treatment, ltration, membrane ltration and adsorption.…”

Section: Environmental Protectionmentioning

confidence: 99%

Hydrogen inhibition in a wet aluminum dust collection system using dichromate solution

Wang

et al. 2017

RSC Adv.

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“…Hexavalent Cr reacts directly with S 2À as a basis for reactions using H 2 S to reduce chromate anion in solution phases, even under anaerobic conditions. 40,41 The net ionic reaction is 3S 2À þ 2Cr 6þ ! 3S þ 2Cr 3þ .…”

Section: Cr-oxide Enhancement Of Photo-oxidation Of Colloidal Qdsmentioning

confidence: 99%

Chromium-oxide enhancement of photo-oxidation of CdSe/ZnS quantum dot solids

Sadeghi

Nejat

Weimer

et al. 2012

Journal of Applied Physics

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Published by the American Institute of Physics. Related ArticlesEffect of dimensionality and morphology on polarized photoluminescence in quantum dot-chain structures J. Appl. Phys. 112, 084314 (2012) Quasiresonant excitation of InP/InGaP quantum dots using second harmonic generated in a photonic crystal cavity Appl. Phys. Lett. 101, 161116 (2012) Size-dependent radiative decay processes in graphene quantum dots Appl. Phys. Lett. 101, 163103 (2012) Optical absorbance of doped Si quantum dots calculated by time-dependent density functional theory with partial electronic self-interaction corrections J. Chem. Phys. 137, 144301 (2012) Analysis of the modified optical properties and band structure of GaAs1−xSbx-capped InAs/GaAs quantum dotsIn this paper, we report the results of depositing CdSe/ZnS quantum dots (QDs) on Cr coated substrates. Compared to such QDs on glass surfaces, the emission peak blueshifts and broadens much more rapidly. The acceleration of the process is presented by showing the relative intensity, position, and full-width as a function of time for various laser intensities, and the effects on photoinduced fluorescence enhancement and photo-oxidiation are discussed. We also consider the thickness of the Cr layer and photo-induced heating, showing this factor should instead lead to a redshift of the peak. Oxidation of colloidal QDs is known to cause blueshifts and broadening of emission peaks (photobleaching). We attribute the faster photobleaching of QDs on Cr films to enhancement in the oxidation of the ZnS shell by catalytic or direct chemical reactions with chromium oxides. As a working hypothesis, this leads to additional paths for breakdown of the otherwise protective nature of the shell. V C 2012 American Institute of Physics. [http://dx.

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Kinetics and thermodynamic treatments of the reduction of hexavalent to trivalent chromium in presence of organic sulphide compounds

Cited by 16 publications

References 6 publications

Carbothermal synthesis of metal-functionalized nanostructures for energy and environmental applications

Carbothermal synthesis of metal-functionalized nanostructures for energy and environmental applications

Hydrogen inhibition in a wet aluminum dust collection system using dichromate solution

Chromium-oxide enhancement of photo-oxidation of CdSe/ZnS quantum dot solids

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