Oxidation of Polynuclear Aromatic Hydrocarbons in Water. 1. Ozonation

Beltrán, Fernando J.; Ovejero, Gabriel; Martín, Juan Vicente González; Rivas, Javier

doi:10.1021/ie00044a012

Cited by 75 publications

(80 citation statements)

References 25 publications

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“…At extremely low pH value (b2.0), oxidation removal decreased sharply due principally to the formation of complex species [Fe(H 2 O) 6 ] 2+ , which reacted slower with peroxide when compared to that of [Fe(OH)(H 2 O) 5 ] 2+ [18]. In addition, the peroxide got solvated in the presence of high concentration of H + ion to form stable peroxone ion [H 3 O 2 ] + .…”

Section: Effect Of Initial Ph Valuementioning

confidence: 99%

“…A wide variety of Fenton's reagent applications have been reported, such as treatment of textile wastewater [4,5], reduction of Polynuclear Aromatic Hydrocarbons (PAHs) in water [6], removal of Adsorbable Organic Halogens (AOXs) from pharmaceutical wastewater [7], treatment of paper pulp manufacturing effluent [8], treatment of leachate [9], removal of citrate and hypophosphite binary components [10], or treatment of wastewater containing nitroaromatic compounds [11].…”

Section: Introductionmentioning

confidence: 99%

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Pretreatment of acrylic fiber manufacturing wastewater by the Fenton process

Zhang

et al. 2012

Desalination

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Section: Effect Of Initial Ph Valuementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pretreatment of acrylic fiber manufacturing wastewater by the Fenton process

Zhang

et al. 2012

Desalination

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“…‡ For the Fenton reaction at pH 3-4, k Fe3 is 76.52 M -1 s -1 (Beltran et al, 1998); this value is approximately threefold higher at pH 8 (Millero and Sotolongo, 1989). For pH 6.7 (the pH assumed for all other model kinetic parameters), k Fe3 was estimated from Beltran et al (Beltran et al, 1998) , which corresponds with that reported by Lovstad (Lovstad, 2003 figure 2C,D in Knowles et al (Knowles et al, 2003).…”

Section: Model Validationmentioning

confidence: 99%

A computational model of intracellular oxygen sensing by hypoxia-inducible factor HIF1α

Qutub

Popel

2006

Journal of Cell Science

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Hypoxia-inducible factor-1, HIF1, transcriptionally activates over 200 genes vital for cell homeostasis and angiogenesis. We developed a computational model to gain a detailed quantitative understanding of how HIF1 acts to sense oxygen and respond to hypoxia. The model consists of kinetic equations describing the intracellular variation of 17 compounds, including HIF1, iron, prolyl hydroxylase, oxygen, ascorbate, 2-oxoglutarate, von Hippel Lindau protein and associated complexes. We tested an existing hypothesis of a switch-like change in HIF1 expression in response to a gradual decrease in O2 concentration. Our model predicts that depending on the molecular environment, such as intracellular iron levels, the hypoxic response varies considerably. We show HIF1-activated cellular responses can be divided into two categories: a steep, switch-like response to O2 and a gradual one. Discovery of this dual response prompted comparison of two therapeutic strategies, ascorbate and iron supplementation, and prolyl hydroxylase targeting, to predict under what microenvironments either effectively increases HIF1α hydroxylation. Results provide crucial insight into the effects of iron and prolyl hydroxylase on oxygen sensing. The model advances quantitative molecular level understanding of HIF1 pathways - an endeavor that will help elucidate the diverse responses to hypoxia found in cancer, ischemia and exercise.

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“…Heterogeneous ozonation was also studied with PAHs associated with different organic and inorganic substrates, such as soot, fly ash, water droplets, etc. (Murray and Singh, 1997;Kamens et al, 1985;Raja and Valsaraj, 2006;Kwamena et al, 2004;Perraudin et al, 2007a,b;Beltran et al, 1995Beltran et al, ,, 1999Kahan et al, 2006). Three-ring member phenanthrene exists mainly in gas phase in ambient air (May and Wise, 1984;Niles and Tan, 1989;Arey et al, 1987;Helmig and Harger, 1994;Vasilakos et al, 2007) because of its high vapor pressure at room temperature (1.6 Â 10 À2 Pa, 298 K, Osborn and Douslin, 1975).…”

Section: Introductionmentioning

confidence: 99%

Homogeneous and heterogeneous reactions of phenanthrene with ozone

Zhang

Yang

Meng

et al. 2010

Atmospheric Environment

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a b s t r a c tThe reactions of gas-phase phenanthrene and suspended phenanthrene particles with ozone were conducted in a 200l chamber. The secondary organic aerosol formation was observed in the reaction of gas-phase phenanthrene with ozone and simultaneously the size distribution of the secondary organic aerosol was monitored with a scanning mobility particle sizer during the formation process. The particulate ozonation products from both reactions were analyzed with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer. 2,2 0 -Diformylbiphenyl was identified as the dominant product in both homogeneous and heterogeneous reactions of phenanthrene with ozone. GC/MS analysis of ozonation products of phenanthrene in glacial acetic acid was carried out for assigning time-of-flight mass spectra of reaction products formed in the homogeneous and heterogeneous reactions of phenanthrene with ozone.

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Oxidation of Polynuclear Aromatic Hydrocarbons in Water. 1. Ozonation

Cited by 75 publications

References 25 publications

Pretreatment of acrylic fiber manufacturing wastewater by the Fenton process

Pretreatment of acrylic fiber manufacturing wastewater by the Fenton process

A computational model of intracellular oxygen sensing by hypoxia-inducible factor HIF1α

Homogeneous and heterogeneous reactions of phenanthrene with ozone

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