scholarly journals The removal of chromium (VI) from tannery waste using Spirulina sp. immobilized silica gel

2021 ◽  
Keyword(s):  
Silica Gel ◽  
Tannery Waste ◽  
Chromium Vi

Sequestered uptake of chromium(VI) by Irvingia gabonensis stem bark extract anchored silica gel

2021 ◽  
Author(s):  
James F. Amaku ◽  
Segun A. Ogundare ◽  
Kovo G. Akpomie ◽  
Comfort M. Ngwu ◽  
Jeanet Conradie
Keyword(s):  
Silica Gel ◽  
Stem Bark ◽  
Bark Extract ◽  
Chromium Vi ◽  
Irvingia Gabonensis ◽  
Stem Bark Extract

Sulfuric Acid Adsorbed on Silica Gel and Chromium(VI) Oxide: Rapid and Selective Oxidation of Alcohols in Solvent-Free Condition.

ChemInform ◽  
2004 ◽  
Vol 35 (22) ◽  
Author(s):  
Majid M. Heravi ◽  
Nasrin Farhangi ◽  
Yahya Sh. Beheshtiha ◽  
Mitra Ghassemzadeh ◽  
Koroush Tabar-Hydar
Keyword(s):  
Sulfuric Acid ◽  
Selective Oxidation ◽  
Silica Gel ◽  
Solvent Free ◽  
Free Condition ◽  
Chromium Vi ◽  
Solvent Free Condition ◽  
Oxidation Of Alcohols

scholarly journals Triethylammonium halochromates/silica gel: an efficient reagent for oxidative coupling of thiols to disulfides

2008 ◽  
Vol 27 (2) ◽  
pp. 117 ◽  
Author(s):  
Shahriare Ghammamy ◽  
Mohammad Kazem Mohammadi ◽  
Ali Hassani Joshaghani
Keyword(s):  
Hydrochloric Acid ◽  
Silica Gel ◽  
Oxidative Coupling ◽  
Hydrofluoric Acid ◽  
Organic Substrates ◽  
Reaction Conditions ◽  
Chromium Vi ◽  
Aromatic Thiols ◽  
Efficient Reagent ◽  
Versatile Reagent

Triethylammonium halochromates, (C2H5)3NCrO3X, TEAXC (X = Cl, F) are easily synthesized by the reaction of triethylamine with a solution of chromium(VI) oxide in 6M hydrochloric acid, or a solution of chromium(VI) oxide in 40% hydrofluoric acid. These reagents are easily supported on common silica gel and can be used as heterogeneous oxidants. Triethylammonium halochromate(VI) is a versatile reagent for the effective and selective oxidation of organic substrates. Various aliphatic (cyclic and acyclic) and aromatic thiols are converted into the corresponding disulfides by treatment with triethylammonium fluorochromate(VI), (TEACC) or triethylammonium chlorochromate(VI), (TEAFC) supported on silica gel, in excellent yields and under mild reaction conditions.

Synthesis of polypyrrole nanoparticles and its grafting with silica gel for selective binding of chromium(VI)

Talanta ◽  
2011 ◽  
Vol 83 (5) ◽  
pp. 1482-1486 ◽  
Author(s):  
P. Mondal ◽  
K. Roy ◽  
S.P. Bayen ◽  
P. Chowdhury
Keyword(s):  
Silica Gel ◽  
Selective Binding ◽  
Chromium Vi ◽  
Polypyrrole Nanoparticles
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