Hydroxyl radical generation in electro-Fenton process with in situ electro-chemical production of Fenton reagents by gas-diffusion-electrode cathode and sacrificial iron anode

2018 ◽  
Vol 203 ◽  
pp. 685-695 ◽  
Author(s):  
Daichi Kubo ◽  
Yoshinori Kawase
Keyword(s):  
Hydroxyl Radical ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Fenton Process ◽  
Chemical Production ◽  
Fenton Reagents ◽  
Radical Generation ◽  
Iron Anode

In-situ catalytic oxidation of Hg0 via a gas diffusion electrode

2017 ◽  
Vol 310 ◽  
pp. 170-178 ◽  
Author(s):  
Yi Xu ◽  
Limei Cao ◽  
Wei Sun ◽  
Ji Yang
Keyword(s):  
Catalytic Oxidation ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode

scholarly journals In Situ Observation of the pH Gradient near the Gas Diffusion Electrode of CO2 Reduction in Alkaline Electrolyte

2020 ◽  
Vol 142 (36) ◽  
pp. 15438-15444 ◽  
Author(s):  
Xu Lu ◽  
Chongqin Zhu ◽  
Zishan Wu ◽  
Jin Xuan ◽  
Joseph S. Francisco ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Ph Gradient ◽  
Alkaline Electrolyte ◽  
In Situ Observation

Efficient degradation of rhodamine B using modified graphite felt gas diffusion electrode by electro-Fenton process

2016 ◽  
Vol 23 (12) ◽  
pp. 11574-11583 ◽  
Author(s):  
Jiangnan Tian ◽  
Ayobami Matthew Olajuyin ◽  
Tingzhen Mu ◽  
Maohua Yang ◽  
Jianmin Xing
Keyword(s):  
Rhodamine B ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Fenton Process ◽  
Graphite Felt

Study on Degradation of Nitrobenzene in Groundwater by Fenton-Like Oxidation Based on Iron in Aquifer Materials

2011 ◽  
Vol 183-185 ◽  
pp. 516-521 ◽  
Author(s):  
Meng Sun ◽  
Yong Sheng Zhao ◽  
Jun Dong ◽  
Li Li Dong
Keyword(s):  
Hydroxyl Radical ◽  
Contaminated Sites ◽  
Contaminated Site ◽  
Generation Process ◽  
High Efficient ◽  
Good Potential ◽  
Three Stages ◽  
Radical Generation ◽  
Extraction Agent

Fenton and Fenton-like reactions are regarded as high efficient methods in advanced treatment of nitrobenzene wastewater but both restrained in degradation of nitrobenzene in groundwater because of the low pH condition( less than 4 ) requirement and other problems such as secondary pollution by the irons in contaminated sites. This paper reports a new Fenton-like technology combined irons extraction from aquifer materials which were found in a nitrobenzene contaminated site in China with hydrogen peroxide catalytic oxidation. The simulate experiments were conducted to investigate the oxidation of nitrobenzene in groundwater by this method under the condition of neutral pH and 8~10°C. The comparison of different extraction agent and production rule of hydroxyl radical were both studied in this research. The results indicated that extraction had hysteresis property because the highest extracting efficiency occurred after 36h. Extraction agent DCB has the highest efficiency, for Fe3+ was 62.92% and Fe2+ was 30.17%. The highest removal efficiency could reach 80.2% while the mole ratio of nitrobenzene to H2O2 was 1:200. Three stages could found in hydroxyl radical generation process, in the first stage hydroxyl radical generated rapidly in 0~30min, then decreased slowly between 30min and 120min, at last the generation tended to be steady after 120h. The results could possess a good potential for application in the treatment of nitrobenzene contaminated groundwater and provide theoretical basis on in-situ chemical remediation technology of nitrobenzene contaminated sites.

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