Fenton chemistry at aqueous interfaces

Enami, Shinichi; Sakamoto, Yosuke; Colussi, A. J.

doi:10.1073/pnas.1314885111

Cited by 289 publications

(295 citation statements)

References 95 publications

(112 reference statements)

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“…7b). [35], and a recent study reported that this reaction proceeded more than 10 3 times faster in aqueous surface than in bulk solution [36]. The air/liquid boundary is known to be an important site for the production and transport of reactive species generated by plasma irradiation [16].…”

Section: Pam-induced Cell Injury In Other Cell Linesmentioning

confidence: 96%

“…Other H 2 O 2 -derived or H 2 O 2 -cooperating species may also be involved in this reaction because the ability of PAM to induce cell injury was higher than its determined H 2 O 2 concentration, while H 2 O 2 -quenching reagents such as catalase or pyruvate most potently attenuated PAM-induced cell injury. The Fenton mechanism is a well-known reaction in which H 2 O 2 is converted to the hydroxyl radical in the presence of Fe 2+ [35],and a recent study reported that this reaction proceeded more than 10 3 times faster in aqueous surface than in bulk solution [36]. The air/liquid boundary is known to be an important site for the production and transport of reactive species generated by plasma irradiation [16].…”

mentioning

confidence: 99%

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Plasma-activated medium induces A549 cell injury via a spiral apoptotic cascade involving the mitochondrial–nuclear network

Adachi

Tanaka

Nonomura

et al. 2015

Free Radical Biology and Medicine

299

295

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Section: Pam-induced Cell Injury In Other Cell Linesmentioning

confidence: 96%

mentioning

confidence: 99%

Plasma-activated medium induces A549 cell injury via a spiral apoptotic cascade involving the mitochondrial–nuclear network

Adachi

Tanaka

Nonomura

et al. 2015

Free Radical Biology and Medicine

299

295

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“…By expanding the aqueous interface, accelerations of the reaction velocity up to 3 orders of magnitude has been measured (Enami et al, 2014). This may be one of the reasons why ironcontaining solid surfaces made of fractal iron oxides, pyrite, activated carbon, graphite, carbon nanotubes, vermiculite, pillared clays and zeolites have been tested as efficient Fenton reagents (Pignatello et al, 2006;Pinto et al, 2012;Teixeira et al, 2012).…”

Section: Oxidation Of Organic Aerosol Particles Containing Black and mentioning

confidence: 99%

Climate engineering by mimicking natural dust climate control: the iron salt aerosol method

et al. 2017

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Abstract. Power stations, ships and air traffic are among the most potent greenhouse gas emitters and are primarily responsible for global warming. Iron salt aerosols (ISAs), composed partly of iron and chloride, exert a cooling effect on climate in several ways. This article aims firstly to examine all direct and indirect natural climate cooling mechanisms driven by ISA tropospheric aerosol particles, showing their cooperation and interaction within the different environmental compartments. Secondly, it looks at a proposal to enhance the cooling effects of ISA in order to reach the optimistic target of the Paris climate agreement to limit the global temperature increase between 1.5 and 2 • C.Mineral dust played an important role during the glacial periods; by using mineral dust as a natural analogue tool and by mimicking the same method used in nature, the proposed ISA method might be able to reduce and stop climate warming. The first estimations made in this article show that by doubling the current natural iron emissions by ISA into the troposphere, i.e., by about 0.3 Tg Fe yr −1 , artificial ISA would enable the prevention or even reversal of global warming. The ISA method proposed integrates technical and economically feasible tools.

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“…Upon PM deposition into the respiratory tract and interactions with lung antioxidants, H 2 O 2 can be generated by redox-active components contained in PM 2.5 such as transition metals (Charrier et al, 2014;Fang et al, 2016), semiquinones (Kumagai et al, 1997;Cho et al, 2005;McWhinney et al, 2013) and humic-like substances (Kumagai et al, 1997;Cho et al, 2005;Lin and Yu, 2011;Charrier et al, 2014;Dou et al, 2015;Fang et al, 2016;Verma et al, 2015a). H 2 O 2 can be converted into highly reactive OH radicals via Fenton-like reactions with iron and copper ions (Charrier et al, 2014;Enami et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Quantification of environmentally persistent free radicals and reactive oxygen species in atmospheric aerosol particles

et al. 2016

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Abstract. Fine particulate matter plays a central role in the adverse health effects of air pollution. Inhalation and deposition of aerosol particles in the respiratory tract can lead to the release of reactive oxygen species (ROS), which may cause oxidative stress. In this study, we have detected and quantified a wide range of particle-associated radicals using electron paramagnetic resonance (EPR) spectroscopy. Ambient particle samples were collected using a cascade impactor at a semi-urban site in central Europe, Mainz, Germany, in May-June 2015. Concentrations of environmentally persistent free radicals (EPFR), most likely semiquinone radicals, were found to be in the range of (1-7) × 10 11 spins µg −1 for particles in the accumulation mode, whereas coarse particles with a diameter larger than 1 µm did not contain substantial amounts of EPFR. Using a spin trapping technique followed by deconvolution of EPR spectra, we have also characterized and quantified ROS, including OH, superoxide (O − 2 ) and carbon-and oxygen-centered organic radicals, which were formed upon extraction of the particle samples in water. Total ROS amounts of (0.1-3) ×10 11 spins µg −1 were released by submicron particle samples and the relative contributions of OH, O − 2 , C-centered and O-centered organic radicals were ∼ 11-31, ∼ 2-8, ∼ 41-72 and ∼ 0-25 %, respectively, depending on particle sizes. OH was the dominant species for coarse particles. Based on comparisons of the EPR spectra of ambient particulate matter with those of mixtures of organic hydroperoxides, quinones and iron ions followed by chemical analysis using liquid chromatography mass spectrometry (LC-MS), we suggest that the particle-associated ROS were formed by decomposition of organic hydroperoxides interacting with transition metal ions and quinones contained in atmospheric humic-like substances (HULIS).

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Fenton chemistry at aqueous interfaces

Cited by 289 publications

References 95 publications

Plasma-activated medium induces A549 cell injury via a spiral apoptotic cascade involving the mitochondrial–nuclear network

Plasma-activated medium induces A549 cell injury via a spiral apoptotic cascade involving the mitochondrial–nuclear network

Climate engineering by mimicking natural dust climate control: the iron salt aerosol method

Quantification of environmentally persistent free radicals and reactive oxygen species in atmospheric aerosol particles

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