Direct UV photolysis of propranolol and metronidazole in aqueous solution

被引：106

作者：

Dantas, Renato F. ^{[1
]}

Rossiter, Otidene ^{[2
]}

Ribeiro Teixeira, Allan Kardec ^{[1
]}

Simoes, Anderson S. M. ^{[3
]}

da Silva, Valdinete Lins ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Chem Engn, BR-50740521 Recife, PE, Brazil

[2] Univ Fed Rio Grande do Norte, Dept Chem Engn, BR-59072970 Natal, RN, Brazil

[3] Univ Fed Paraiba, Dept Chem, BR-58059900 Joao Pessoa, Paraiba, Brazil

来源：

CHEMICAL ENGINEERING JOURNAL | 2010年 / 158卷 / 02期

关键词：

Pharmaceuticals; UV; Direct photolysis; Toxicity; Kinetics; Biodegradability; WATER TREATMENT PLANTS; WASTE-WATER; AQUATIC ENVIRONMENT; EMERGING CONTAMINANTS; DEGRADATION; DRUGS; PHOTODEGRADATION; PHARMACEUTICALS; REMOVAL; DISINFECTION;

D O I：

10.1016/j.cej.2009.12.017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The aim of this work was to study the direct photolysis of two pharmaceuticals: propranolol (PRO) and metronidazole (MET) promoted by ultra violet radiation (UV). For this purpose. 50 and 100 mg L(-1) aqueous solutions of PRO and MET were irradiated by two different UV sources: a UV-254 germicidal lamp (UV-C) and a UV-365 black light lamp (UV-A). After 8 h of irradiation, direct UV photolysis promoted substantial pharmaceuticals removal, especially with the use of UV-C radiation (near 50%). However, on average only 12% of the organic matter content was photodegraded. The photo-transformation of both compounds promoted the formation of more biodegradable byproducts. Nevertheless, PRO direct UV-C photolysis produced byproducts with less toxic character while MET irradiation promoted a slight increase of toxicity. Direct photolysis of PRO using solar radiation was proved to be as effective as those runs carried out with the UV-C device. Kinetic constants based on time and UV-C fluency were in a magnitude order of 10(-2) h(-1) and 10(-5) cm(2) mJ(-1), respectively. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：143 / 147

页数：5

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