Removal of EDTA by UV-C/hydrogen peroxide

被引：20

作者：

Baeza, C

Rossner, A

Jardim, WF

Liter, MI

Mansilla, HD

机构：

[1] Univ Concepcion, Fac Ciencias Quim, Lab Recursos Renovables, Concepcion, Chile

[2] Comis Nacl Energia Atom, Ctr Atom Constituyentes, Unidad Actividad Quim, RA-1650 Buenos Aires, DF, Argentina

[3] Univ Estadual Campinas, Inst Quim, BR-13087197 Campinas, SP, Brazil

来源：

ENVIRONMENTAL TECHNOLOGY | 2003年 / 24卷 / 10期

关键词：

advanced oxidation technologies; EDTA; UV/hydrogen peroxide; UV/TiO2 heterogeneous photocatalysis;

D O I：

10.1080/09593330309385670

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Mineralization of a 5 mM EDTA solution at pH 3 was evaluated via TOC removal under UV-C irradiation in the presence of H2O2 at various conditions. The highest TOC removal (78%) was obtained using a 40:1 H2O2/EDTA molar ratio, after 540 min irradiation. However, a 20:1 ratio gave slightly lower results, being economically more attractive. Best results of TOC removal were obtained under pH controlled conditions. Addition of TiO2 (1 g l(-1)) was detrimental, even in the presence of H2O2, indicating that at this concentration, TiO2 inhibits the mineralization, probably by scattering or by screening of the light.

引用

页码：1277 / 1281

页数：5

共 24 条

[11] COMPARISON OF THE PHOTOCATALYTIC EFFICIENCY OF TIO2 IRON-OXIDES AND MIXED TI(IV) FE(III) OXIDES - PHOTODEGRADATION OF OLIGOCARBOXYLIC ACIDS [J].