Hydrogen peroxide modified polyacrylonitrile-based fibers and oxidative stabilization under microwave and conventional heating – The 1st comparative study

2019 ◽  
Vol 45 (10) ◽  
pp. 13385-13392 ◽  
Author(s):  
Cheng Zhang ◽  
Runping Li ◽  
Jianhua Liu ◽  
Shenghui Guo ◽  
Lei Xu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Comparative Study ◽  
Conventional Heating ◽  
Oxidative Stabilization

A comparative study of the electrogeneration of hydrogen peroxide using Vulcan and Printex carbon supports

Carbon ◽  
2011 ◽  
Vol 49 (8) ◽  
pp. 2842-2851 ◽  
Author(s):  
M.H.M.T. Assumpção ◽  
R.F.B. De Souza ◽  
D.C. Rascio ◽  
J.C.M. Silva ◽  
M.L. Calegaro ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Comparative Study ◽  
Carbon Supports

A comparative study between Keggin-type tungstophosphates and tungstosilicates in the oxidation of cyclooctane with hydrogen peroxide

2004 ◽  
Vol 222 (1-2) ◽  
pp. 159-165 ◽  
Author(s):  
M. Salete S. Balula ◽  
Isabel C.M.S. Santos ◽  
Mário M.Q. Simões ◽  
M. Graça P.M.S. Neves ◽  
José A.S. Cavaleiro ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Comparative Study ◽  
Keggin Type

scholarly journals Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Dongzhuang Hou ◽  
Lang Liu ◽  
Qixing Yang ◽  
Bo Zhang ◽  
Huafu Qiu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Comparative Study ◽  
Contact Time ◽  
Synergetic Effect ◽  
Economic Conditions ◽  
Gold Mine ◽  
Optimal Conditions ◽  
Gold Leaching ◽  
Sodium Metabisulphite ◽  
To Come

Cyanidation is widely used by most gold mine worldwide and will remain prevail in years (or decades) to come, while cyanide is hazardous, toxic pollutants whose presence in wastewater and tailings can seriously affect human and its environment; hence, it is necessary to control these contaminants. The purpose of this study was to examine the effects through the investigation of changes in pH, concentration, and contact time, and the optimal conditions were obtained. It has been proven that the decomposition of cyanide in solution and tailings increased as the alkalinity in the presence of 0.5 g/L Na2S2O5. An increase in H2O2 (30%) concentration (from 1 to 4 mL/L) increased the decomposition in solution, while the effect on removing cyanide was better when pH was 9 than 8 and 10 in tailings. The cyanide in tailings decreased in the first 4 h and increased after 4 h. The effective and economic conditions for maximum decomposition of cyanide from leach tailings are first treated in 0.5 g/L Na2S2O5 at pH 10 for 3 hours and then 2 mL/L H2O2 (30%) is added to the tailings at pH 9 for 4 hours through comparative study. The findings provide the basis to optimize the decomposition of cyanide from gold leaching tailings in mining or backfilling by using the synergetic effect of Na2S2O5 and H2O2.

Magnetically recoverable porphyrin-based nanocatalysts for the effective oxidation of olefins with hydrogen peroxide: a comparative study

2020 ◽  
Vol 44 (44) ◽  
pp. 19385-19392
Author(s):  
Saeed Rayati ◽  
Dana Moradi ◽  
Fatemeh Nejabat
Keyword(s):  
Hydrogen Peroxide ◽  
Magnetic Nanoparticles ◽  
Comparative Study ◽  
Amide Bond ◽  
Functionalized Silica ◽  
Simple Method ◽  
Amine Functionalized ◽  
Oxidation Of Olefins

A simple method for the functionalization of magnetic nanoparticles, which is achieved by the attachment of metalloporphyrin onto the surface of amine functionalized silica-coated magnetic nanoparticles via an amide bond.

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