Transformation of monuron photosensitized by soil extracted humic substances: energy or hydrogen transfer mechanism?

Richard, Claire; Vialaton, Delphine; Aguer, Jean‐Pierre; Andreux, F.

doi:10.1016/s1010-6030(97)00239-6

Cited by 45 publications

(32 citation statements)

References 25 publications

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“…oxidised or reduced sensitizer undergoes subsequent reThe influence of soil and sediment composition on the actions to regenerate the initial species [184][185][186]54,187].…”

Section: 4-bis[bis(isopropoxycarbonyl)methylene]-13-dithietanementioning

confidence: 99%

Reaction pathways and mechanisms of photodegradation of pesticides

Burrows

Santaballa

Steenken

2002

Journal of Photochemistry and Photobiology B: Biology

568

286

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The photodegradation of pesticides is reviewed, with particular reference to the studies that describe the mechanisms of the processes involved, the nature of reactive intermediates and final products. Potential use of photochemical processes in advanced oxidation methods for water treatment is also discussed. Processes considered include direct photolysis leading to homolysis or heterolysis of the pesticide, photosensitized photodegradation by singlet oxygen and a variety of metal complexes, photolysis in heterogeneous media and degradation by reaction with intermediates generated by photolytic or radiolytic means.

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“…oxidised or reduced sensitizer undergoes subsequent reThe influence of soil and sediment composition on the actions to regenerate the initial species [184][185][186]54,187].…”

Section: 4-bis[bis(isopropoxycarbonyl)methylene]-13-dithietanementioning

confidence: 99%

Reaction pathways and mechanisms of photodegradation of pesticides

Burrows

Santaballa

Steenken

2002

Journal of Photochemistry and Photobiology B: Biology

568

286

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show abstract

“…In particular, humic and fulvic acids have been shown to generate, upon solar irradiation, oxidizing species such as hydroxyl radical [1,2], singlet oxygen [3], superoxide radical ion [4] or reactive triplet excited states [5,6]. These species can react with chemicals present in surface waters and participate in the most important abiotic processes for xenobiotics removal [7].…”

Section: Introductionmentioning

confidence: 99%

Application of soluble bio-organic substances (SBO) as photocatalysts for wastewater treatment: Sensitizing effect and photo-Fenton-like process

et al. 2013

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ElsevierGomis Vicens, J.; Vercher Pérez, RF.; Amat Payá, AM.; Arqués Sanz, A. (2013). Application of soluble bio-organic substances (SBO) as photocatalysts for wastewater treatment: Sensitizing effect and photo-Fenton-like process. Catalysis Today. 209:176-180. doi:10.1016Today. 209:176-180. doi:10. /j.cattod.2012. HighlightsThe use of SBO isolated from urban wastes for water treatment has been explored.

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“…The proposed mechanism for SW-BOS photoactivity can thus also be proposed for UW-BOS; it is based on the production, under UV/Vis irradiation, of excited triplet states that can in turn react with organic substrates by two main mechanisms: hydrogen transfer and energy transfer. [18,20,21] A group of UW-BOS was previously shown to perform efficiently as sensitizers for the photodegradation of azo-dyes. [5] The presence of dissolved oxygen was also found to favor the degradation process.…”

Section: Introductionmentioning

confidence: 99%

Waste‐Derived Bioorganic Substances for Light‐Induced Generation of Reactive Oxygenated Species

et al. 2010

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Urban waste-derived bioorganic substances (UW-BOS) have shown promise as chemical auxiliaries for a number of technological applications in the chemical industry and in environmental remediation. In this study, the application of these substances in the photodegradation of organic pollutants is addressed. The experimental work is specifically focused on the photolysis mechanism promoted by AC8, a UW-BOS isolated from a 2:1 w/w mixture of food and green residues, composted for 110 days, using 4-chlorophenol (4-CP) as probe molecule. The production of (⋅)OH and the ¹O₂ is monitored by EPR spectroscopy. The correlation between radical species evolution and photodegradation of 4-CP is investigated. The effect of ¹O₂ and (⋅)OH scavengers on the 4-CP degradation process is also checked. The results suggest that the role of these species in the photodegradation of 4-CP depends on AC8 concentration. AC8 is thereby proven to be a photosensitizer for applications in environmental remediation. The results on AC8 further support the use of urban bio-waste as a versatile source of chemical auxiliaries of biological origin for use in diversified applications.

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Transformation of monuron photosensitized by soil extracted humic substances: energy or hydrogen transfer mechanism?

Cited by 45 publications

References 25 publications

Reaction pathways and mechanisms of photodegradation of pesticides

Reaction pathways and mechanisms of photodegradation of pesticides

Application of soluble bio-organic substances (SBO) as photocatalysts for wastewater treatment: Sensitizing effect and photo-Fenton-like process

Waste‐Derived Bioorganic Substances for Light‐Induced Generation of Reactive Oxygenated Species

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