title: Rates of production of hydroxyl radicals and singlet oxygen from irradiated compost.
abstract: The use of organic matter from compost to promote the catalytic photodegradation of micropollutants by solar light appears to be environmentally promising. However, quantitative evaluation of the photodegradation potential of the compost is needed. Our goal was to measure the formation rate of hydroxyl radicals and singlet oxygen, two strongly oxidant species, from irradiated compost organic matter. These two reactive species were photogenerated in all of our extracts regardless of the origin of the compost or the extraction procedure; however, their formation rates increased with composting time. Two herbicides and a fungicide were successfully photodegraded when irradiated with simulated or natural solar light in the presence of the compost organic matter or compost suspensions. For reasons of simplification and ease, the use of the latter is recommended in practice.
authors.affiliation: Clermont Université, Université Blaise Pascal, Laboratoire de Photochimie Moléculaire et Macromoléculaire (LPMM), BP 10448, 63000 Clermont-Ferrand, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Coelho
authors.forename: Luciano
authors.initials: L
authors.lastname: Cavani
authors.forename: Alexandra
authors.initials: A
authors.lastname: ter Halle
authors.forename: Ghislain
authors.initials: G
authors.lastname: Guyot
authors.forename: Claudio
authors.initials: C
authors.lastname: Ciavatta
authors.forename: Claire
authors.initials: C
authors.lastname: Richard
mesh_terms: D052918:Environmental Restoration and Remediation; D005659:Fungicides, Industrial / Q000737:chemistry; D006540:Herbicides / Q000737:chemistry; D017665:Hydroxyl Radical / Q000378:metabolism*; D008027:Light; D010782:Photolysis; D026082:Singlet Oxygen / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*
chemical_list: D005659:Fungicides, Industrial; D006540:Herbicides; D012987:Soil; D026082:Singlet Oxygen; D017665:Hydroxyl Radical