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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Photodegradation behaviour of multiclass ultraviolet filters in the aquatic environment: Removal strategies and photoproduct identification by liquid chromatography-high resolution mass spectrometry
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Photodegradation behaviour of multiclass ultraviolet filters in the aquatic environment: Removal strategies and photoproduct identification by liquid chromatography-high resolution mass spectrometry

机译：水生环境中多标菌紫外线过滤器的光降解行为：液相色谱 - 高分辨率质谱法去除策略和光调节鉴定

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摘要

Different photodegradation strategies were assessed to remove 21 multiclass organic ultraviolet (UV) filters including benzophenone-, camphor-, and p-aminobenzoic acid- derivatives, methoxycinnamates, and salicylates, among others, from the aquatic environment. Direct photolysis under UVA (lambda = 365 nm) and UVC (lambda = 254 nm) radiations and advanced oxidation processes (AOPs) based on heterogeneous UVA/TiO2 photocatalysis and the UVC/H2O2 system were applied for the degradation tests. LC-MS/MS and SPME-GC-MS/MS were employed for the monitoring of the target compound degradations. UVC photolysis provided the highest removal efficiency for most of the studied UV filters with degradation yields higher than 90% after 60 min of light exposure in ultrapure water. This radiation was also applied to different real water matrices (river, sea, and swimming-pool water), showing that the degradation yield was dependent on the water matrix, being more difficult the removal of the target compounds in waters with high organic matter content. In an attempt to accelerate the degradation of the studied compounds in this kind of water matrices, the use of a powerful UVC/H2O2 system improvement the reaction kinetics, showing degradation > 90% for most of the studied UV filters. Besides, up to 19 photoproducts could be identified by HRMS. (C) 2019 Elsevier B.V. All rights reserved.
机译：评估了不同的光降解策略，以除去21种多种多类有机紫外（UV）滤光器，包括二苯甲酮，樟脑和对氨基苯甲酸 - 衍生物，甲氧基琥珀酸盐和水杨酸盐，其中包括水生环境。基于异质UVA / TiO2光催化和UVC / H2O2系统的UVA（Lambda = 365nm）和UVC（Lambda = 254nm）和UVC（Lambda = 254nm）辐射和先进的氧化方法（AOP）下的直接光解。 LC-MS / MS和SPME-GC-MS / MS用于监测目标复合降解。 UVC光解为大多数研究的UV过滤器提供了最高的去除效率，其在超纯水中60分钟后的60分钟后的降解产率高于90％。该辐射也适用于不同的真实水基质（河流，海和游泳池水），表明降解产率依赖于水基质，更难以在具有高有机物质含量的水中除去靶化合物。为了加速研究的这种水基质中研究的化合物的降解，使用强大的UVC / H2O2系统改善了反应动力学，显示出大多数研究的UV过滤器的降解> 90％。此外，最多可以通过HRM鉴定19个光调节。 （c）2019 Elsevier B.v.保留所有权利。

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