Photosensitized degradation of bisphenol A involving reactive oxygen species in the presence of humic substances

Zhan, Manjun; Yang, Xi; Xian, Qiming; Kong, Lingqian

doi:10.1016/j.chemosphere.2005.08.046

Cited by 201 publications

(105 citation statements)

References 25 publications

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“…S3) and Å OH was of no help to SPY photodegradation. Although HA could also enhance the photodegradation as a photosensitizer (Hassett, 2006;Vione et al, 2006;Zhan et al, 2006), the result of this experiment indicated that photosensitization might be secondary to the SPY degradation. This was corresponded with previous studies that HA could bring about light attenuation (Dimou et al, 2004(Dimou et al, , 2005Ge et al, 2009).…”

Section: Natural Organic Matter (Dom)mentioning

confidence: 81%

Photodegradation of sulfapyridine under simulated sunlight irradiation: Kinetics, mechanism and toxicity evolvement

Hao

Guo

et al. 2014

Chemosphere

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h i g h l i g h t sSulfapyridine was effectively photodegraded under UV-vis irradiation. Factors affecting the photodegradation process were investigated. Degradation intermediates were identified and possible pathway was proposed. Bioassay test showed reaction products were much more toxic than parent compound. a r t i c l e i n f o t r a c tIn this study, the photoinduced degradation of sulfapyridine (SPY) was investigated under simulated light irradiation (k > 200 nm). The effect of pH and main water constituents including nitrate ion, bicarbonate, dissolved organic matter (DOM) and iron(III) on the photodegradation was explored. SPY was effectively removed in aqueous solution at pH 8 under UV-vis irradiation, with removal efficiency of 100% within 120 min. DOM and iron(III) had retarding influence on the SPY removal, whereas nitrate ion and bicarbonate did not show any obvious effect. Under UV-vis irradiation, the formation of singlet oxygen ( 1 O 2 ) accelerated the SPY photodegradation and the contribution of indirect photolysis due to reaction with 1 O 2 was up to 42%. The transformation products of SPY were identified by HPLC-MS and the possible photoreaction pathways were proposed. It showed that photoinduced hydrolysis, photo-oxidation via 1 O 2 and desulfonation were the main degradation ways for SPY decomposition. Toxicity assays by Vibrio fischeri proved that the transformation products were more toxic than the parent compound.

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Section: Natural Organic Matter (Dom)mentioning

confidence: 81%

Photodegradation of sulfapyridine under simulated sunlight irradiation: Kinetics, mechanism and toxicity evolvement

Hao

Guo

et al. 2014

Chemosphere

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“…These results might be caused by the fact that HA exposed to gamma ray irradiation forms the excited triplet states ( 3 HA * ), which generates various reactive oxidation species, including ·OH radicals, singlet oxygen ( 1 O 2 ), and H 2 O 2 (Eqs. 4, 5, and 6) (Sandvik et al 2000;Zhan et al 2006).…”

Section: Effect Of Ha and No 3 As Additivesmentioning

confidence: 98%

Factors that have an effect on degradation of diclofenac in aqueous solution by gamma ray irradiation

Luo

Zhang

et al. 2011

Environ Sci Pollut Res

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“…Humic substances have been seen to enhance the degradation of organic compounds by promoting photo-Fenton reactions [Fukushima and Tatsumi, 2001;Xu et al, 2006;Zhan et al, 2006], for example, enhancing the degree of pentachlorophenol degradation from 40% after 5 h of irradiation to more than 90% with added humic acid [Fukushima and Tatsumi, 2001]. Humic substances also produce various reactive oxygen species under photoirradiation [Sandvik et al, 2000], leading to accelerated pollutant oxidation [Sakkas et al, 2002;Chin et al, 2004;Zhan et al, 2006].…”

Section: Resultsmentioning

confidence: 99%

Atmospheric HULIS enhance pollutant degradation by promoting the dark Fenton reaction

Moonshine¹,

Rudich²,

Katsman³

et al. 2008

Geophysical Research Letters

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[1] Humic-like substances (HULIS) in the atmosphere are ubiquitous macromolecular substances that comprise a major fraction of the organic component of atmospheric aerosols. In this study we report that HULIS extracted from collected wood burning and urban pollution atmospheric particles enhance aqueous phase oxidation of model organic contaminants (pyrene and phenol), by promoting the dark Fenton reaction under atmospherically relevant conditions. The paucity of radical sources at night makes this reaction, which is not accounted for in cloud chemistry models, potentially quite important for understanding and quantifying in-cloud degradation of organic pollutants, and for understanding Fe oxidation state speciation in atmospheric waters. Citation: Moonshine, M., Y. Rudich, S. Katsman, and E. R. Graber (2008), Atmospheric HULIS enhance pollutant degradation by promoting the dark Fenton reaction, Geophys.

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Photosensitized degradation of bisphenol A involving reactive oxygen species in the presence of humic substances

Cited by 201 publications

References 25 publications

Photodegradation of sulfapyridine under simulated sunlight irradiation: Kinetics, mechanism and toxicity evolvement

Photodegradation of sulfapyridine under simulated sunlight irradiation: Kinetics, mechanism and toxicity evolvement

Factors that have an effect on degradation of diclofenac in aqueous solution by gamma ray irradiation

Atmospheric HULIS enhance pollutant degradation by promoting the dark Fenton reaction

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