Photooxidation of the antidepressant drug Fluoxetine (Prozac®) in aqueous media by hybrid catalytic/ozonation processes.
Photooxidation of the antidepressant drug Fluoxetine (Prozac®) in aqueous media by hybrid catalytic/ozonation processes.
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DOI：
10.1016/j.watres.2011.02.030
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发表时间：
2011-04
期刊：
影响因子：
12.8
通讯作者：
Fabiola Méndez-Arriaga;Tomohiko Otsu;T. Oyama;J. Giménez;S. Esplugas;H. Hidaka;N. Serpone
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文献类型：
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作者：
Fabiola Méndez-Arriaga;Tomohiko Otsu;T. Oyama;J. Giménez;S. Esplugas;H. Hidaka;N. Serpone
本文在实验室规模上考察了Prozac®（也称为氟西汀，FXT）在紫外线照射和非紫外线照射下的几种氧化过程：例如，单独使用TiO 2、单独使用O3以及由O3 + H2O2（PEROXONE过程）、TiO 2 + O3和TiO 2 + O3 + H2O2组成的混合方法。结果表明，FXT在TiO2上的吸附具有很强的pH依赖性，吸附在整个降解过程中起着至关重要的作用。FXT的光解仅在碱性pH下才是显著的。非均相光辅助过程在约100 μ mol/L内去除0.11 mM FXT（初始浓度）。60分钟，同时在pH 11下矿化50%（TiO 2负载量，0.050 g L-1）。H2O2的存在使矿化进一步提高到> 70%。UV/臭氧化比UV/TiO 2更大程度地消除FXT：即，100%消除FXT是通过UV/O3在第一个10分钟的反应和几乎97%的矿化是在UV照射下，在H2O2的存在下实现的。UV + TiO2 + O3 + H2O2的复合结构可以提高水中溶解性有机碳（DOC）的去除率。然而，30分钟留下重要的无机碳（IC）含量。在所有情况下，H2O2的存在改善了DOC的消除，但并非没有对FXT的生物降解性的不利影响，由于在最终处理的流出物中的有机碳含量低，连同剩余的无机副产物的显着水平。光辅助TiO2/O3杂化法可能被证明是一种有效的组合，以加强水环境中的难降解药物污染物的废水处理。
This article examines the oxidative disposal of Prozac®(also known as Fluoxetine, FXT) through several oxidative processes with and without UV irradiation: for example, TiO2alone, O3alone, and the hybrid methods comprised of O3+ H2O2(PEROXONE process), TiO2+ O3and TiO2+ O3+ H2O2at the laboratory scale. Results show a strong pH dependence of the adsorption of FXT on TiO2and the crucial role of adsorption in the whole degradation process. Photolysis of FXT is remarkable only under alkaline pH. The heterogeneous photoassisted process removes 0.11 mM FXT (initial concentration) within ca. 60 min with a concomitant 50% mineralization at pH 11 (TiO2loading, 0.050 g L−1). The presence of H2O2enhances the mineralization further to >70%. UV/ozonation leads to the elimination of FXT to a greater extent than does UV/TiO2: i.e., 100% elimination of FXT is achieved by UV/O3in the first 10 min of reaction and almost 97% mineralization is attained under UV irradiation in the presence of H2O2. The hybrid configuration UV + TiO2+ O3+ H2O2enhances removal of dissolved organic carbon (DOC) in ca. 30 min leaving, however, an important inorganic carbon (IC) content. In all cases, the presence of H2O2improves the elimination of DOC, but not without a detrimental effect on the biodegradability of FXT owing to the low organic carbon content in the final treated effluent, together with significant levels of inorganic byproducts remaining. The photoassisted TiO2/O3hybrid method may prove to be an efficient combination to enhance wastewater treatment of recalcitrant drug pollutants in aquatic environments.