Treatment of Pesticides in Wastewater by Heterogeneous and Homogeneous Photocatalysis

被引：9

作者：

Stan, Catalina Daniela ^{[2
]}

Cretescu, Igor ^{[1
]}

Pastravanu, Cristina ^{[3
]}

Poulios, Ioannis ^{[4
]}

Dragan, Maria ^{[2
]}

机构：

[1] Gheorghe Asachi Tech Univ Iasi, Fac Chem Engn & Environm Protect, Dept Environm Engn & Management, Iasi 700050, Romania

[2] Grigore T Popa Univ Med & Pharm, Dept Drug Ind & Pharmaceut Biotechnol, Iasi 700115, Romania

[3] Alexandru Ioan Cuza Univ, Dept Chem Mat, Iasi 700506, Romania

[4] Aristotle Univ Thessaloniki, Dept Chem, Thessaloniki 54124, Greece

来源：

INTERNATIONAL JOURNAL OF PHOTOENERGY | 2012年 / 2012卷

关键词：

OXIDATION; DECOLORIZATION; OPTIMIZATION; DEGRADATION;

D O I：

10.1155/2012/194823

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of different heterogeneous and homogeneous photocatalytic systems on the oxidative degradation of mepiquat chloride in aqueous solutions was investigated. In the case of heterogeneous reactions, the influence of five factors was studied: the type of catalyst, photocatalyst concentration, pH, pesticide concentration, and the presence of H2O2 and/or Fe3+. For homogeneous catalysis, other factors were studied: the oxidising agent and the light source. Nearly complete degradation of mepiquat chloride was obtained after about 180 minutes in the presence of an acid medium (pH3) using a UV-A lamp and TiO2P-25 catalyst (0.5 g/L), for an initial pesticide concentration of 10 ppm. Degradation rates corresponding to homogeneous photocatalysis were lower compared to those corresponding to the use of TiO2 as the photocatalyst.

引用

页数：6

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