Accelerated mineralization of the drug Diclofenac via Fenton reactions in a concentric photo-reactor

被引：140

作者：

Ravina, M

Campanella, L

Kiwi, J ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Chem, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

[2] Univ Roma La Sapienza, Dept Chem, I-00185 Rome, Italy

来源：

WATER RESEARCH | 2002年 / 36卷 / 14期

关键词：

diclofenac mineralization and photo-degradation; Fenton reactions; oxidative radicals in solution;

D O I：

10.1016/S0043-1354(02)00075-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The complete mineralization of concentrated solutions of Diclofenac (2-[(2,6-dichlorophenyl) amino] benzene-acetic acid) sodium salt C14H10Cl2NO2Na was carried out in a concentric cylindrical immersion photoreactor in batch mode operation. Irradiation with a lamp emitting light at 254 nn (400 W) achieved total mineralization of Diclofenac solutions (0.062 mM or TOC 20 mgCl(-1)) in times under an hour. The mineralization was carried out via Fenton photo-assisted treatment. A determination of the solution parameters was carried out to optimize the time of the Diclofenac pretreatment, the type and intensity of the light source, the effect of the concentrations of Fe-ions and the oxidant added in solution and the reactor recirculation rate. Diclofenac disappearance was monitored by high liquid pressure chromatography (HPLC). Concomitantly, the aromatic and aliphatic intermediates were also monitored under low-energy (36 W) light irradiation at 366 nm in order to be able to detect the intermediates by HPLC in the minute time scale. The decrease of the chemical oxygen demand was followed during Diclofenac degradation. The activation energy for the mineralization of Diclofenac was determined to be 4.02 Kcal mol(-1). (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：3553 / 3560

页数：8

共 17 条

[1] Chemical(photo-activated) coupled biological homogeneous degradation of p-nitro-o-toluene-sulfonic acid in a flow reactor [J].