PINO/NHPI-mediated selective oxidation of cycloalkenes to cycloalkenones via a photo-electrochemical method

2019 ◽  
Vol 55 (63) ◽  
pp. 9339-9342 ◽  
Author(s):  
Hiroyuki Tateno ◽  
Yugo Miseki ◽  
Kazuhiro Sayama
Keyword(s):  
Electrochemical Oxidation ◽  
Selective Oxidation ◽  
Electrochemical Method ◽  
Applied Bias ◽  
Indirect Oxidation

The photo-electrochemical oxidation of cyclohexene to 2-cyclohexene-1-one was successfully performed with excellent Faraday efficiency (>99%) via indirect oxidation with a PINO/NHPI mediator and O2 on a BiVO4/WO3 photoanode under low applied bias.

Electrochemical treatment of poly- and perfluoroalkyl substances in brines

2020 ◽  
Vol 6 (10) ◽  
pp. 2704-2712
Author(s):  
Charles E. Schaefer ◽  
Danielle Tran ◽  
Yida Fang ◽  
Youn Jeong Choi ◽  
Christopher P. Higgins ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Anodic Oxidation ◽  
Electrochemical Treatment ◽  
Perfluoroalkyl Substances ◽  
Indirect Oxidation ◽  
Bench Scale ◽  
Film Forming

Bench-scale experiments were performed to evaluate the electrochemical oxidation, via direct anodic oxidation and indirect oxidation from salt-derived species, of diluted aqueous film forming foam (AFFF) in brine solutions.

The Application and Research of Electrochemical Method Treating Acid Red 3R Simulation Wastewater by Response Surface Method

2013 ◽  
Vol 295-298 ◽  
pp. 1258-1262
Author(s):  
Jun Sheng Hu ◽  
Lei Guan ◽  
Jia Li Dong ◽  
Ying Wang ◽  
Ying Yong Duan
Keyword(s):  
Response Surface ◽  
Electrochemical Oxidation ◽  
Current Density ◽  
Electrochemical Method ◽  
Electrolyte Concentration ◽  
Ph Value ◽  
Removal Rate ◽  
Oxidation Method ◽  
Surface Method ◽  
Optimal Value

Using electrochemical oxidation method treats the acid red 3R simulation wastewater, investigates the influence of current density, electrolyte concentration, pH-value and aeration and their interaction on the removal rate of chroma. Through the design of Box-Benhnken Design(BBD) and the response surface analysis, the influence sequence of all variables is current density > aeration > electrolyte concentration > pH-value, the influence sequence of all interaction is electrolyte concentration-aeration > current density-aeration ,electrolyte concentration-pH value > current density-pH value > pH value-aeration > current density-electrolyte concentration. Ultimately, the optimal value is 98.4915% under the condition of current density of 6.51mA/cm2,electrolyte concentration of 0.04mol/L,pH-value of 4.17 and aeration of 0.24m3/h.

Determination of Platinum and Palladium in the Presence of other Metals in the Mineral Raw Materials

2016 ◽  
Vol 712 ◽  
pp. 332-337 ◽  
Author(s):  
Elvira M. Ustinova ◽  
Eduard Gorchakov
Keyword(s):  
Electrochemical Oxidation ◽  
Electrochemical Method ◽  
Raw Materials ◽  
Mineral Raw Materials ◽  
Oxidation Processes

An electrochemical method for determination of the platinum and palladium was suggested and developed in this study. The effect of accompanying elements on the electrochemical oxidation processes of platinum and palladium has been described. It has been shown that the determination of platinum and palladium is possible only after removal of sample components.

ChemInform Abstract: Selective Oxidation of 1,2-Diols by Electrochemical Method Using Organotin Compound and Bromide Ion as Mediators.

ChemInform ◽  
2010 ◽  
Vol 29 (19) ◽  
pp. no-no
Author(s):  
T. MAKI ◽  
K. FUKAE ◽  
H. HARASAWA ◽  
T. OHISHI ◽  
Y. MATSUMURA ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Electrochemical Method ◽  
Organotin Compound ◽  
Bromide Ion

Destruction of refractory humic acid by electromechanical oxidation process

2000 ◽  
Vol 42 (3-4) ◽  
pp. 225-232 ◽  
Author(s):  
L.-C. Chaing ◽  
J.-E. Chang ◽  
T.-Cn. Wen
Keyword(s):  
Humic Acid ◽  
Electrochemical Oxidation ◽  
Humic Substance ◽  
Current Density ◽  
High Efficiency ◽  
Oxidation Process ◽  
Chloride Concentration ◽  
Chloride Ion ◽  
Gel Permeation Chromatography ◽  
Indirect Oxidation

Electrochemical oxidation of humic acid has been conducted to evaluate the efficacy of the process for the destruction of high-molecular-weight (HMW) compounds. Experimental results show that the destruction of humic acid obtained by the electrolysis supported by chloride ion is much better than that obtained by sulfate ion. Accordingly, HMW compound such as humic substance is suggested to be resistant to directly anodic oxidation, but to be readily destroyed by an indirect oxidation of chlorine/hypochlorite during an electrochemical treatment process. The effects of operating parameters, including anode material, current density, electrolyte concentration, have been investigated in this study. A tertiary-oxide of Sn, Pd, Ru coated titanium (SPR) anode with high electrocatalytic activity was found to have high efficiency for humic acid destruction, and the destruction efficacy of humic substance increased with increasing current density and chloride concentration. In this study, gel permeation chromatography (GPC) and adsorptive organic halide (AOX) had been performed to examine the variation of organic characteristics during the electrochemical oxidation of humic acid. The results from GPC and AOX show that HMW organic compounds could be effectively destroyed by electrochemical oxidation process, and the process also produced less undesirable chlorinated byproducts than the chlorination process. From the above results, the electrochemical oxidation conducted by indirect oxidation effect of chlorine/hypochlorite could be concluded to be a feasible method for the destruction of HMW compounds.

Selective oxidation of 1,2-diols by electrochemical method using organotin compound and bromide ion as mediators

1998 ◽  
Vol 39 (7) ◽  
pp. 651-654 ◽  
Author(s):  
Toshihide Maki ◽  
Kazuhiro Fukae ◽  
Hitomi Harasawa ◽  
Takahiro Ohishi ◽  
Yoshihiro Matsumura ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Electrochemical Method ◽  
Organotin Compound ◽  
Bromide Ion

Electrochemical treatment of textile wastewater

1996 ◽  
Vol 34 (11) ◽  
pp. 17-24 ◽  
Author(s):  
J. Naumczyk ◽  
L. Szpyrkowicz ◽  
F. Zilio-Grandi
Keyword(s):  
Electrochemical Method ◽  
Textile Wastewater ◽  
Electrochemical Treatment ◽  
High Concentration ◽  
Butanoic Acid ◽  
Indirect Oxidation ◽  
Organics Removal ◽  
Ms Analysis ◽  
Oxidation Of Organics

The treatment of textile wastewater, containing a high concentration of Cl- ion, by an electrochemical method using Ti/RuO2, Ti/Pt and Ti/Pt/Ir electrodes is investigated. All three anodes proved to be very effective in direct or indirect oxidation of organics present in the wastewater. After 60 min of electrolysis at 6 A/dm2, COD was reduced by 85-92% and DOC by about 85%. Of the three electrodes tested, the efficiency of organics removal followed the order: Ti/RuO2 > Ti/Pt > Ti/Pt/Ir. The electrochemical treatment of textile wastewater resulted in the production of many chloroorganics in high concentration. GC-MS analysis showed the presence of the following major products: 1,1-dichlorocyclopentene, 2,3-dichloro-2-methylbutane, chloromethylsilane, 2,3-dichloro-2-methyl butanoic acid, 2,3-dichloro-2-methyl propanol, 2,3-dimethyl-2, 3-butanediol and 2-butylphenol.

scholarly journals Removal rates and energy demand of the electrochemical oxidation of ammonia and organic substances in real stored urine

2017 ◽  
Vol 3 (3) ◽  
pp. 480-491 ◽  
Author(s):  
Hanspeter Zöllig ◽  
Annette Remmele ◽  
Eberhard Morgenroth ◽  
Kai M. Udert
Keyword(s):  
Electrochemical Oxidation ◽  
Energy Demand ◽  
High Energy ◽  
Organic Substances ◽  
Removal Rates ◽  
Indirect Oxidation ◽  
Galvanostatic Electrolysis ◽  
Energy Needs ◽  
Fast Removal ◽  
Oxidation Of Ammonia

Galvanostatic electrolysis of real stored urine leads to a fast removal of ammonia and organic substances by indirect oxidation. However, this comes with a price: high energy needs and harmful byproducts.

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