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

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.

scholarly journals Removal of chromium(vi) from polluted wastewater by chemical modification of silica gel with 4-acetyl-3-hydroxyaniline

RSC Advances ◽  
2019 ◽  
Vol 9 (64) ◽  
pp. 37403-37414 ◽  
Author(s):  
Ali Bilgiç ◽  
Aysel Çimen
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Chemical Modification ◽  
Silica Gel ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Chromium Vi ◽  
Polluted Wastewater ◽  
Wastewater Treatment Systems

Use of a newly synthesized Si-CPTS-AHAP adsorbent in the removal of Cr(vi) ions in wastewater treatment systems may potentially lead to low cost and highly efficient heavy metal removal.

Modified Poly(4-vinylpyridine) Coated Silica Gel. Fast Kinetics of Diffusion-Controlled Sorption of Chromium(VI)

2001 ◽  
Vol 40 (4) ◽  
pp. 1200-1204 ◽  
Author(s):  
Dianchen Gang ◽  
Wenqing Hu ◽  
Shankha K. Banerji ◽  
Thomas E. Clevenger
Keyword(s):  
Silica Gel ◽  
Fast Kinetics ◽  
Chromium Vi ◽  
Diffusion Controlled ◽  
Kinetics Of
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