Phenol degradation using hydroxyl radicals generated from zero-valent iron and hydrogen peroxide

2006 ◽  
Vol 63 (1-2) ◽  
pp. 15-19 ◽  
Author(s):  
David H. Bremner ◽  
Arthur E. Burgess ◽  
Didier Houllemare ◽  
Kyu-Cheol Namkung
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radicals ◽  
Phenol Degradation ◽  
Zero Valent Iron

The generation of hydroxyl radicals by hydrogen peroxide decomposition on FeOCl/SBA-15 catalysts for phenol degradation

AIChE Journal ◽  
2014 ◽  
Vol 61 (1) ◽  
pp. 166-176 ◽  
Author(s):  
Xue-jing Yang ◽  
Peng-fei Tian ◽  
Xiao-man Zhang ◽  
Xin Yu ◽  
Ting Wu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radicals ◽  
Phenol Degradation ◽  
Hydrogen Peroxide Decomposition ◽  
Peroxide Decomposition

scholarly journals Use of Low-Cost Magnetic Materials Containing Waste Derivatives for the (Photo)-Fenton Removal of Organic Pollutants

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3942 ◽  
Author(s):  
Paola Calza ◽  
Jessica Di Sarro ◽  
Giuliana Magnacca ◽  
Alessandra Bianco Prevot ◽  
Enzo Laurenti
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radicals ◽  
Low Cost ◽  
Phenol Degradation ◽  
Organic Coating ◽  
Maghemite Nanoparticles ◽  
Experimental Conditions ◽  
Material Optimization ◽  
Experimental Parameters ◽  
Suitable Amount

Hybrid magnetite/maghemite nanoparticles (MNP) coated with waste-sourced bio-based substances (BBS) were synthesized and studied for the degradation of phenol, chosen as a model pollutant, in water. A systematic study was undertaken in order to rationalize MNP–BBS behavior and optimize their performance. The effect of experimental parameters, such as light irradiation, addition of hydrogen peroxide, and the ratio between hydrogen peroxide and MNP–BBS concentrations, was studied. The generation of hydroxyl radicals was assessed, and the recovery and re-cycle of the material was investigated. Our results indicate that phenol degradation could be attained by both Fenton and photo-Fenton processes, with higher efficiency in dark condition and in the presence of a suitable amount of hydrogen peroxide. Evidence was obtained for the roles of iron ions leached from the materials as well as of organic matter released in the solution upon partial photodegradation of the organic coating. The reusability tests indicated a lower but still valid performance of the material. Optimization of the experimental conditions was performed to achieve the highest efficiency in substrate degradation, and fundamental insights into the mechanism of the MNP–BBS Fenton-like reaction were obtained.

Removal of Proteinaceous Soils Using Hydroxyl Radicals Generated by the Electrolysis of Hydrogen Peroxide

2002 ◽  
Vol 250 (2) ◽  
pp. 409-414 ◽  
Author(s):  
Koreyoshi Imamura ◽  
Yoichiro Tada ◽  
Hirohumi Tanaka ◽  
Takaharu Sakiyama ◽  
Kazuhiro Nakanishi
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radicals

scholarly journals Killing of Bacillus Spores by Aqueous Dissolved Oxygen, Ascorbic Acid, and Copper Ions

2003 ◽  
Vol 69 (4) ◽  
pp. 2245-2252 ◽  
Author(s):  
J. B. Cross ◽  
R. P. Currier ◽  
D. J. Torraco ◽  
L. A. Vanderberg ◽  
G. L. Wagner ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Dissolved Oxygen ◽  
Hydroxyl Radicals ◽  
Fenton Reaction ◽  
Copper Ions ◽  
Transition Metal Ions ◽  
Fenton Reagent ◽  
Bacillus Spores ◽  
Modified Fenton

ABSTRACT An approach to decontamination of biological endospores is discussed. Specifically, the performance of an aqueous modified Fenton reagent is examined. A modified Fenton reagent formulation of cupric chloride, ascorbic acid, and sodium chloride is shown to be an effective sporicide under aerobic conditions. The traditional Fenton reaction involves the conversion of hydrogen peroxide to hydroxyl radical by aqueous ionic catalysts such as the transition metal ions. Our modified Fenton reaction involves the conversion of aqueous dissolved oxygen to hydrogen peroxide by an ionic catalyst (Cu2+) and then subsequent conversion to hydroxyl radicals. Results are given for the modified Fenton reagent deactivating spores of Bacillus globigii. A biocidal mechanism is proposed that is consistent with our experimental results and independently derived information found in the literature. This mechanism requires diffusion of relatively benign species into the interior of the spore, where dissolved O2 is then converted through a series of reactions which ultimately produce hydroxyl radicals that perform the killing action.

scholarly journals Photochemical Degradation of Sulfadiazine

2013 ◽  
Vol 39 (3) ◽  
pp. 79-91 ◽  
Author(s):  
Natalia Lemańska-Malinowska ◽  
Ewa Felis ◽  
Joanna Surmacz-Górska
Keyword(s):  
Hydrogen Peroxide ◽  
Uv Radiation ◽  
Hydroxyl Radicals ◽  
Rate Constant ◽  
Photochemical Degradation ◽  
Photochemical Processes

Abstract The photochemical degradation of the sulfadiazine (SDZ) was studied. The photochemical processes used in degradation of SDZ were UV and UV/H2O2. In the experiments hydrogen peroxide was applied at different concentrations: 10 mg/dm3 (2.94*10-4 M), 100 mg/dm3 (2.94*10-3 M), 1 g/dm3 (2.94*10-2 M) and 10 g/dm3 (2.94*10-1 M). The concentrations of SDZ during the experiment were controlled by means of HPLC. The best results of sulfadiazine degradation, the 100% removal of the compound, were achieved by photolysis using UV radiation in the presence of 100 mg H2O2/dm3 (2.94*10-3 M). The determined rate constant of sulfadiazine reaction with hydroxyl radicals kOH was equal 1.98*109 M-1s-1.

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