Comparison of chemiluminescence methods for analysis of hydrogen peroxide and hydroxyl radicals

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.

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Photochemical Degradation of Sulfadiazine

Archives of Environmental Protection ◽

10.2478/aep-2013-0027 ◽

2013 ◽

Vol 39 (3) ◽

pp. 79-91 ◽

Cited By ~ 6

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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(9) the oxidation rate of organic compounds is fast when large amount of ferrous ions are present because large amount of hydroxyl radicals are produced. However, the Fenton reaction may slow down due to the slow ferrous ion production. In previous studies, the photocatalytic degradation of dichlorvos (DDVP. an insecticide) on glass supported titanium dioxide was investigated. Results indicate that photocatalysis can be an effective process for the degradation of dichlorvos [3]. The mineralization of dichlorvos and the reduction of toxicity were investigated via the photocatalytic reaction [4]. This study uses Fenton’s reagent, ferrous ions/hydrogen peroxide, to oxidize dichlorvos with an attempt to explore the behavior of dichlorvos oxidation and how factors such as pH, [H O ],

Hazardous and Industrial Waste Proceedings, 30th Mid-Atlantic Conference ◽

10.1201/9781498709453-151 ◽

2014 ◽

pp. 920-921

Keyword(s):

Hydrogen Peroxide ◽

Titanium Dioxide ◽

Photocatalytic Degradation ◽

Organic Compounds ◽

Hydroxyl Radicals ◽

Oxidation Rate ◽

Ferrous Ion ◽

Photocatalytic Reaction ◽

Ferrous Ions ◽

Ion Production

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Oxygen Uptake and Spectrophotometric Measurement of Superoxide,Hydrogen Peroxide and Hydroxyl Radicals

Pharmaceutica Analytica Acta ◽

10.4172/2153-2435.s7-005 ◽

2013 ◽

Vol 01 (S7) ◽

Author(s):

Hideharu Shintani

Keyword(s):

Hydrogen Peroxide ◽

Oxygen Uptake ◽

Hydroxyl Radicals ◽

Spectrophotometric Measurement

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Bactericidal effect of hydroxyl radicals generated by the sonolysis and photolysis of hydrogen peroxide for endodontic applications

Microbial Pathogenesis ◽

10.1016/j.micpath.2016.12.010 ◽

2017 ◽

Vol 103 ◽

pp. 65-70 ◽

Cited By ~ 6

Author(s):

Haruna Ibi ◽

Makoto Hayashi ◽

Fumihiko Yoshino ◽

Muneaki Tamura ◽

Ayaka Yoshida ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Hydroxyl Radicals ◽

Bactericidal Effect

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Comparative toxicity of hydrogen peroxide, hydroxyl radicals, and superoxide anion to Escherichia coli

Advances in Environmental Research ◽

10.1016/s1093-0191(02)00100-4 ◽

2003 ◽

Vol 7 (4) ◽

pp. 961-968 ◽

Cited By ~ 44

Author(s):

Richard J. Watts ◽

Diana Washington ◽

Jimmy Howsawkeng ◽

Frank J. Loge ◽

Amy L. Teel

Keyword(s):

Escherichia Coli ◽

Hydrogen Peroxide ◽

Hydroxyl Radicals ◽

Superoxide Anion ◽

Comparative Toxicity

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Controlled RAFT polymerization facilitated by a nanostructured enzyme mimic

Polymer Chemistry ◽

10.1039/c8py00832a ◽

2018 ◽

Vol 9 (35) ◽

pp. 4448-4454 ◽

Cited By ~ 12

Author(s):

Qiang Fu ◽

Hadi Ranji-Burachaloo ◽

Min Liu ◽

Thomas G. McKenzie ◽

Shereen Tan ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Hydroxyl Radicals ◽

Raft Polymerization ◽

Enzyme Mimic ◽

Organic Media

A nanostructured MOF composite was utilized as an enzyme mimic for the generation of hydroxyl radicals from hydrogen peroxide, which can subsequently initiate RAFT polymerizations in aqueous or organic media.

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