Efficient H2O2 generation and electro-Fenton degradation of pollutants in microchannels of oxidized monolithic-porous-carbon cathode

Abstract A monolithic-porous carbon (MPC) was fabricated by carbonizing a pine rod, and then the oxidized monolithic-porous carbon (O-MPC) was obtained via alkaline heat treatment of MPC. With well-ordered axial channels (diameters were 6–14 μm and 40–50 μm) and oxygen-containing functional groups, O-MPC as a flow-through cathode exhibited good capability in continuously generating H2O2 (422 μmol/L) via oxygen reduction. O-MPC and additional Fe2+ composed an electro-Fenton system and the performance of the system in degradation of organic pollutants was evaluated. For phenol, bisphenol A or sulfamethoxazole at initial concentration of 10 mg/L the removal efficiency reached 74%–82% in a hydraulic retention time of 100 seconds, nearly close to that of the homogeneous Fenton process (90%). This efficiency may be maintained for at least 10 hours, indicating a good stability of O-MPC. The results demonstrate the potential of O-MPC as a flow-through electrode to realize homogeneous-like degradation of organic pollutants in wastewater.

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Flow-through heterogeneous electro-Fenton system based on the absorbent cotton derived bulk electrode for refractory organic pollutants treatment

Separation and Purification Technology ◽

10.1016/j.seppur.2021.119266 ◽

2021 ◽

pp. 119266

Author(s):

Xin Wang ◽

Peike Cao ◽

Kun Zhao ◽

Shuo Chen ◽

Hongtao Yu ◽

...

Keyword(s):

Organic Pollutants ◽

Absorbent Cotton ◽

Flow Through ◽

Refractory Organic Pollutants ◽

Fenton System ◽

Bulk Electrode

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A highly energy-efficient flow-through electro-Fenton process for organic pollutants degradation

Electrochimica Acta ◽

10.1016/j.electacta.2016.03.181 ◽

2016 ◽

Vol 200 ◽

pp. 222-230 ◽

Cited By ~ 83

Author(s):

Liang Ma ◽

Minghua Zhou ◽

Gengbo Ren ◽

Weilu Yang ◽

Liang Liang

Keyword(s):

Organic Pollutants ◽

Energy Efficient ◽

Fenton Process ◽

Flow Through

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Degreasing cotton used as pore-creating agent to prepare hydrophobic and porous carbon cathode for the electro-Fenton system: enhanced H2O2 generation and RhB degradation

Environmental Science and Pollution Research ◽

10.1007/s11356-021-12965-z ◽

2021 ◽

Author(s):

Hongzhao Su ◽

Yanyang Chu ◽

Baoyu Miao

Keyword(s):

Porous Carbon ◽

Carbon Cathode ◽

H2o2 Generation ◽

Fenton System

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Removal of Tramp Elements within 7075 Alloy by Super-Gravity Aided Rheorefining Method

Metals ◽

10.3390/met8090701 ◽

2018 ◽

Vol 8 (9) ◽

pp. 701 ◽

Cited By ~ 5

Author(s):

Lei Guo ◽

Xiaochun Wen ◽

Qipeng Bao ◽

Zhancheng Guo

Keyword(s):

Heat Treatment ◽

Liquid Phase ◽

7075 Aluminum Alloy ◽

Total Removal ◽

Tramp Element ◽

Removal Ratio ◽

Gravity Coefficient ◽

Flow Through ◽

Solid Phases ◽

7075 Alloy

An investigation was made on the super-gravity aided rheorefining process of recycled 7075 aluminum alloy in order to remove tramp elements. The separation temperatures in this study were selected as 609 °C, 617 °C and 625 °C. And the gravity coefficients were set as 400 G, 700 G, 1000 G. The finely distributed impurity inclusions will aggregate to the grain boundaries of Al-enriched phase during heat treatment. In the field of super-gravity, the liquid phase composed of tramp elements Zn, Cu, Mg et al. will flow through the gaps between solid Al-enriched grains and form into filtrate. Both the weight of filtrate and removal ratio of tramp element improved with the increase of gravity coefficient. The total removal ratio of tramp element decreased with the fall of temperature due to the flowability deterioration of liquid phase. The time for effective separation of liquid/solid phases with super-gravity can be restricted within 1 min.

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MnO2 decorated porous carbon derived from Enteromorpha prolifera as flow-through electrode for dual-mode capacitive deionization

Desalination ◽

10.1016/j.desal.2021.114977 ◽

2021 ◽

Vol 504 ◽

pp. 114977

Author(s):

Yong Liu ◽

Bo Geng ◽

Yuchen Zhang ◽

Xin Gao ◽

Xin Du ◽

...

Keyword(s):

Porous Carbon ◽

Capacitive Deionization ◽

Enteromorpha Prolifera ◽

Dual Mode ◽

Flow Through

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A review on TiO2-based composites for superior photocatalytic activity

Reviews in Inorganic Chemistry ◽

10.1515/revic-2020-0025 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Wail Al Zoubi ◽

Abbas Ali Salih Al-Hamdani ◽

Baek Sunghun ◽

Young Gun Ko

Keyword(s):

Photocatalytic Activity ◽

Organic Pollutants ◽

Cost Efficiency ◽

High Stability ◽

Photocatalytic Oxidation ◽

Oxidation Process ◽

Ambient Conditions ◽

Photoelectrochemical Activity ◽

As Doping ◽

Degradation Of Pollutants

Abstract Heterogeneous photocatalysts was a promising material for removing organic pollutants. Titanium dioxide (TiO2) was a suitable photocatalyst for its cost efficiency and high stability to reduce various pollutants. Enhancing TiO2 photocatalyst performance by doping with changed metals or non-metal ions and organic compounds have been reviewed. These methods could enhance photoelectrochemical activity via: (i) by a donor of electrons via electron-donor agents that would produce particular defects in TiO2 structure and capture transporters of charge; (ii) by reducing recombination rate of the charge transporters and increasing degradation of pollutants. This study investigates the modification approaches of TiO2 that comprise methods for overcoming the essential TiO2 restrictions and enhancing the photocatalytic degradation of organic pollutants. Consequently, it emphasized on the current progress of modified-TiO2 used for different pollutants in ambient conditions. Amendment techniques, such as inorganic and organic parts as doping, are studied. The reported experimental results obtained with the photocatalytic oxidation process for degrading organic pollutants were also collected and assessed.

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