Photodegradation of imazethapyr herbicide by using slurry and supported TiO2: Efficiency comparison

被引：14

作者：

El Madani, M. ^{[1
]}

Harir, M. ^{[2
]}

Zrineh, A. ^{[1
]}

El Azzouzi, M. ^{[1
]}

机构：

[1] Univ Mohammed 5, Fac Sci, Rabat, Morocco

[2] Helmholtz Ctr Munich, German Res Ctr Environm Hlth, Inst Ecol Chem, Dept BioGeoChem & Analyt, D-85764 Neuherberg, Germany

来源：

ARABIAN JOURNAL OF CHEMISTRY | 2015年 / 8卷 / 02期

关键词：

Photodegradation; Imazethapyr; Kinetic; P25; Degussa; PC500; Millennium; PHOTOCATALYTIC DEGRADATION; AQUEOUS SUSPENSION; TITANIUM-DIOXIDE; WATER; PESTICIDE; OXIDATION; KINETICS; DIURON; OXIDE; ACID;

D O I：

10.1016/j.arabjc.2011.03.013

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Kinetic photodegradation of imazethapyr, a herbicide from imidazolinone class of pesticides, has been investigated in aqueous solution using slurry titanium dioxide (TiO2) and supported on Ahlstrom paper (flexible photocatalytic support). Two types of TiO2 e. g., Millennium PC500 (100% anatase) and Degussa P25 (80% anatase, 20% rutile) were used. Experiments were investigated to evaluate the effect of the adsorption, initial concentrations of the pesticide as well as catalyst doses on the photocatalytic degradation of imazethapyr. Kinetic parameters were experimentally determined and a half-order kinetic was observed. Regarding Langmuir-Hinshelwood model, the kinetic of the imazethapyr degradation was more efficient at higher pesticide concentrations and catalyst doses. Accordingly, Degussa P25 shows higher photocatalytic activity in regard to PC500 Millennium. (C) 2011 Production and hosting by Elsevier B. V. on behalf of King Saud University.

引用

页码：181 / 185

页数：5

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