Abstract：
:Photo-Fenton/ozone (PhFO) and TiO2-photocatalysis/ozone (PhCO) coupled systems are used as advanced oxidation processes for the degradation of the following biorecalcitrant pesticides: alachlor, atrazine, chlorfenvinfos, diuron, isoproturon and pentachlorophenol. These organic compounds are considered Priority Hazardous Substances by the Water Framework Directive of the European Commission. The degradation process of the different pesticides, that occurs through oxidation of the organic molecules by means of their reaction with generated OH radical, follows a first and zero-order kinetics, when PhFO and PhCO are applied, respectively. These two Advanced Oxidation Processes, together with the traditional ozone+UV, have been used to investigate TOC reduction of the different pesticide aqueous solutions. The best results of pesticide mineralization are obtained when PhFO is applied; with the use of this advanced oxidation process the aqueous pesticide solutions become detoxyfied except in the case of atrazine and alachlor aqueous solutions for which no detoxification is achieved at the experimental conditions used in the work, at least after 2 and 3 h of treatment, respectively.
journal_name
Chemospherejournal_title
Chemosphereauthors
Farré MJ,Franch MI,Malato S,Ayllón JA,Peral J,Doménech Xdoi
10.1016/j.chemosphere.2004.09.064subject
Has Abstractpub_date
2005-02-01 00:00:00pages
1127-33issue
8eissn
0045-6535issn
1879-1298pii
S0045-6535(04)00861-6journal_volume
58pub_type
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