In Situ-Formed Phenoxyl Radical on the CuO Surface Triggers Efficient Persulfate Activation for Phenol Degradation

2021 ◽  
Author(s):  
Mingjie Huang ◽  
Yi Han ◽  
Wei Xiang ◽  
Delai Zhong ◽  
Chen Wang ◽  
...  
Keyword(s):  
Phenol Degradation ◽  
Phenoxyl Radical ◽  
Persulfate Activation

scholarly journals Effects of Persulfate Activation with Pyrite and Zero-Valent Iron for Phthalate Acid Ester Degradation

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 354
Author(s):  
Muhammad A. Imran ◽  
Yuzhen Tong ◽  
Qing Hu ◽  
Mingzhu Liu ◽  
Honghan Chen
Keyword(s):  
Zero Valent Iron ◽  
Pyrite Surface ◽  
Groundwater Treatment ◽  
Oxidation Reduction ◽  
Organic Carbon Concentration ◽  
Oxidation Reduction Potential ◽  
Persulfate Activation ◽  
Surface Morphologies ◽  
Ethylhexyl Phthalate

Phthalic acid esters (PAEs) are often detected in remediated groundwater using appropriate oxidant materials by in situ groundwater treatment. The study compares zero-valent iron–persulfate with a pyrite–persulfate system to degrade three PAEs—di(2-ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), and dimethyl phthalate (DMP). Column experiments were conducted, and rapid oxidation occurred in a pyrite–persulfate system due to sulfate radical generation. DMP concentration was found at about 60.0% and 53.0% with zero-valent iron (ZVI) and pyrite activation of persulfate, respectively. DBP concentration was measured as 25.0–17.2% and 23.2–16.0% using ZVI–persulfate and pyrite–persulfate systems, respectively. However, DEHP was not detected. The total organic carbon concentration lagged behind the Ʃ3 PAEs. Persulfate consumption with ZVI activation was half of the consumption with pyrite activation. Both systems showed a steady release of iron ions. Overall, the oxidation–reduction potential was higher with pyrite activation. The surface morphologies of ZVI and pyrite were investigated using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and XPS. Intensive corrosion occurs on the pyrite surface, whereas the ZVI surface is covered by a netting of iron oxides. The pyrite surface showed more oxidation and less passivation in comparison with ZVI, which results in more availability of Fe 2 + for persulfate activation. The pyrite–persulfate system is relatively preferred for rapid PAE degradation for contamination.

Pd–Fe/TiO2 catalysts for phenol degradation with in situ generated H2O2

2014 ◽  
Vol 71 (1) ◽  
pp. 96-101 ◽  
Author(s):  
Mohamed Triki ◽  
Sandra Contreras ◽  
Francisco Medina
Keyword(s):  
Phenol Degradation

Phenol degradation by Fenton's process using catalytic in situ generated hydrogen peroxide

2009 ◽  
Vol 89 (3-4) ◽  
pp. 519-526 ◽  
Author(s):  
Mohammad S. Yalfani ◽  
Sandra Contreras ◽  
Francesc Medina ◽  
Jesus Sueiras
Keyword(s):  
Hydrogen Peroxide ◽  
Phenol Degradation ◽  
Fenton's Process

Persulfate activation by glucose for in situ chemical oxidation

2018 ◽  
Vol 133 ◽  
pp. 247-254 ◽  
Author(s):  
Richard J. Watts ◽  
Mushtaque Ahmad ◽  
Amanda K. Hohner ◽  
Amy L. Teel
Keyword(s):  
Chemical Oxidation ◽  
In Situ Chemical Oxidation ◽  
Persulfate Activation

Enhanced electro-oxidation/peroxone (in situ) process with a Ti-based nickel-antimony doped tin oxide anode for phenol degradation

2020 ◽  
Vol 384 ◽  
pp. 121398 ◽  
Author(s):  
Chao Qu ◽  
Ghulam Sarwar Soomro ◽  
Na Ren ◽  
Da-wei Liang ◽  
Shan-fu Lu ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Phenol Degradation ◽  
Electro Oxidation ◽  
Oxide Anode

Roles of the mineral constituents in sludge-derived biochar in persulfate activation for phenol degradation

2020 ◽  
Vol 398 ◽  
pp. 122861 ◽  
Author(s):  
Jun Liang ◽  
Xiaoyun Xu ◽  
Qijun Zhong ◽  
Zibo Xu ◽  
Ling Zhao ◽  
...  
Keyword(s):  
Phenol Degradation ◽  
Persulfate Activation ◽  
Mineral Constituents

Iron/Sulfur Co-Doped Titanium Dioxide Nanotubes: Optimization of the Photoelectrocatalytic Degradation of Phenol Red under Visible Light

2020 ◽  
Vol 847 ◽  
pp. 95-101
Author(s):  
Edgar Clyde R. Lopez ◽  
Nicole Elyse B. Saputil ◽  
Lance A. Loza ◽  
Fiona Fritz G. Camiguing ◽  
Marlon Jr. L. Mopon ◽  
...  
Keyword(s):  
Dye Degradation ◽  
Statistical Significance ◽  
Phenol Degradation ◽  
Quadratic Model ◽  
Phenol Red ◽  
Electron Hole ◽  
Iron Sulfur ◽  
Photoelectrocatalytic Degradation ◽  
Co Doped

Photoelectrocatalysis is a rapidly developing technology for degrading recalcitrant organic compounds in wastewater due to its ability to overcome electron-hole recombination. Herein, we synthesized Fe/S co-doped TiO2 nanotubes through an in-situ anodization technique. We developed a simple reduced quadratic model based on response surface modeling which can be used to adequately correlate the operating parameters with the photoelectrocatalytic performance of Fe/S-TiNTs in degrading phenol red. Predicted maximum dye degradation of 54.78% was achieved by the generated model using the optimized parameters: initial phenol red concentration = 5.22 mg L-1, applied voltage = 27.4 V, and dopant loading = 2.97 wt.%. Upon validation, experimental maximum phenol degradation of 53.24% was obtained, which agrees well with the predicted value within statistical significance. Overall, our model can be potentially used for process optimization within the design space studied.

“In situ” investigations to define the degradation of phenols in groundwater

2007 ◽  
Vol 7 (3) ◽  
pp. 9-16
Author(s):  
M. Dimkić ◽  
M. Pušić ◽  
M. Jordanovski
Keyword(s):  
Analytical Methods ◽  
Phenol Degradation ◽  
Aerobic Conditions ◽  
Aquifer Material ◽  
Short Overview ◽  
Sandy Aquifers ◽  
Kinetics Of

Phenols are especially suitable for defining the mechanism of their degradation in groundwater. Phenols, for the most part, do not sorb on clastic aquifer material. This allows for a comparison of their relative concentrations in groundwater to the concentrations of a tracer, and leads to conclusions which can be drawn about the kinetics of phenol degradation. We have had an opportunity to monitor, in detail, the degradation of phenols at three locations. All three cases involved gravelly and sandy aquifers and aerobic conditions. A summary of the analytical methods applied, and basic results obtained is presented. This paper represents a short overview of the flow and results of the monitoring and five tests which were conducted at the three locations over several years. We believe that the results are representative of the behavior of phenols in aerobic intergranular aquifers.

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