Results 31 to 40 of about 175,134 (306)
Concentrator cell methodology in the regeneration and recycle of chromium etching solutions using membrane technology [PDF]
, 2006 The regeneration of chromium (VI) and the recovery of etched copper from chromium etching solutions by electrodialysis is improved by the addition of a concentrator cell, using ion exchange resins or activated carbon cloth as concentrator media, in the ...
Chaudhary, AJ, Ganguli, B, Grimes, SM
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EPJ Nuclear Sciences & Technologies, 2020 Effect of the [U(IV)/U(III)] ratio of fuel salt on selective chromium corrosion and tellurium intergranular cracking (IGC) of Hastelloy N alloy in the LiF-BeF2-UF4 salt mixture was investigated.
Surenkov Aleksandr +6 more
doaj +1 more source
Chemical reduction of hexavalent chromium (VI) in soil slurry by nano zero valent iron [PDF]
, 2015 The increasing industrial development of recent decades has lead to the production of increasing quantities of waste containing heavy metals, elements often harmful to the environment, which in the past were not properly disposed of, thus inducing soil
DI PALMA, Luca +2 more
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Heliyon, 2023 In the present paper, three electrodes were prepared with the aim of detecting chromium (III) in pharmaceutical tablets and comparing their capabilities and efficiency.
Abbas Nasri Fateh +4 more
doaj +1 more source
A Chromium-Diphosphine System for Catalytic Ethylene Trimerization: Synthetic and Structural Studies of Chromium Complexes with a Nitrogen-Bridged Diphosphine Ligand with ortho-Methoxyaryl Substituents [PDF]
, 2006 To gain molecular-level insight into the important features of a chromium-diphosphine catalytic system for ethylene trimerization, the coordination chemistry of chromium with “PNP” ligands (PNP^(OMe) = (o-MeOC_6H_4)_2PN(CH_3)P(o-MeOC_6H_4)_2, P^(t-Bu)N ...
Agapie, Theodor +4 more
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Removal of chromium (III) by two-aqueous phases extraction [PDF]
, 2009 Two-aqueous phase extraction of chromium (III) as a solute from their aqueous solutions was investigated using polyethoxylated alcohols (CiEj) as a biodegradable non-ionic surfactant in the presence of anionic sodium dodecylbenzene sulfonate (SDBS ...
Amine, Didi Mohamed +3 more
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Synthesis and Investigation the Catalytic Behavior of Cr2O3 Nanoparticles [PDF]
Journal of Nanostructures, 2013 The use of an inorganic phase in water-in-oil (w/o) microemulsion has recently received considerable attention for preparing metal oxide nanoparticles. This is a technique, which allows preparation of ultrafine metal oxide nanoparticles within the size ...
R. Karimian, F. Piri
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Evaluation and Assessment of Trivalent and Hexavalent Chromium on Avena sativa and Soil Enzymes
Molecules, 2023 Chromium (Cr) can exist in several oxidation states, but the two most stable forms—Cr(III) and Cr(VI)—have completely different biochemical characteristics.
Edyta Boros-Lajszner +2 more
doaj +1 more source
Indonesian Journal of Chemistry, 2010 A specific, selective and simple method for speciation of chromium(VI) and chromium(III) has been developed. This method is based on the quantitative extraction of chromium(VI) and chromium(III) as an ion association of tetramethylammonium-chromate in ...
Valencia Widiyaningrum Wandoyo +2 more
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Disposal of highly toxic waste chromium solutions [PDF]
E3S Web of ConferencesThe aim of the study is to determine the effect of organic reductants (sawdust) on the degree of reduction of chromium (VI) ions in the complex processing of waste chromium-containing solution (electrolyte) of plating production, as at the same time to ...
Mukhammadiev Komil +3 more
doaj +1 more source