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Overview of the Phototransformation of Wastewater Effluents by High-Resolution Mass Spectrometry.
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-01-14 , DOI: 10.1021/acs.est.9b04669
Lushi Lian 1 , Shuwen Yan 1, 2 , Huaxi Zhou 1 , Weihua Song 1, 2
Affiliation  

Photochemical transformation driven by sunlight is one of the most important natural processes for organic contaminant attenuation. In the current study, statistical analysis-assisted high-resolution mass spectrometry was employed to investigate the phototransformation of nontarget features in wastewater effluents under various radical quenching/enhancing conditions. A total of 9694 nontarget features were extracted from the effluents, including photoresistant features, photolabile features, and transformation products. 65% of the wastewater effluent features were photoresistant, and the photolabile features could be classified into five groups: direct photolysis group (group I), HO•-originated species-dominated group (group II), 3OM*-dominated group (group III), photochemically produced reactive intermediates combination-dominated group (group IV), and non-first-order degradation group (group V). The direct photolyzed features were observed to degrade significantly faster than the indirect photolyzed features. Moreover, group II dominated by HO•-originated species contributed 34% to the photolabile features. The reaction types that occurred in the phototransformation process were analyzed by linkage analysis. The results suggested that oxygen addition and dealkyl group reactions were the most common reaction types identified in the phototransformation process. Overall, high-resolution mass spectrometry coupled with statistical analysis was applied here to understand the photochemical behavior of the unknown features in wastewater effluents.

中文翻译:

高分辨率质谱法对废水进行光转化的概述。

阳光驱动的光化学转化是减少有机污染物的最重要的自然过程之一。在当前的研究中,采用统计分析辅助的高分辨率质谱法研究了在各种自由基淬灭/增强条件下废水中非目标特征的光转化。从废水中总共提取了9694个非目标特征,包括光阻特征,光不稳定特征和转化产物。65%的废水出水特征是抗光的,并且对光不稳定的特征可分为五组:直接光解组(I组),HO•起源物种主导组(II组),3OM *主导组(III组) ),光化学产生的反应性中间体组合为主的组(IV组)和非一级降解组(V组)。观察到直接光解的特征比间接光解的特征明显更快地降解。此外,由HO•起源的物种主导的第二类对光不稳定特征的贡献为34%。通过连锁分析来分析在光转化过程中发生的反应类型。结果表明加氧和脱烷基反应是在光转化过程中确定的最常见的反应类型。总的来说,高分辨率质谱与统计分析相结合,可用于了解废水中未知特征的光化学行为。观察到直接光解特征比间接光解特征明显更快地降解。此外,由HO•起源的物种主导的第二类对光不稳定特征的贡献为34%。通过连锁分析来分析在光转化过程中发生的反应类型。结果表明加氧和脱烷基反应是在光转化过程中确定的最常见的反应类型。总的来说,高分辨率质谱与统计分析相结合,可用于了解废水中未知特征的光化学行为。观察到直接光解特征比间接光解特征明显更快地降解。此外,由HO•起源的物种主导的第二类对光不稳定特征的贡献为34%。通过连锁分析来分析在光转化过程中发生的反应类型。结果表明加氧和脱烷基反应是在光转化过程中确定的最常见的反应类型。总的来说,高分辨率质谱与统计分析相结合,可用于了解废水中未知特征的光化学行为。通过连锁分析来分析在光转化过程中发生的反应类型。结果表明加氧和脱烷基反应是在光转化过程中确定的最常见的反应类型。总的来说,高分辨率质谱与统计分析相结合,可用于了解废水中未知特征的光化学行为。通过连锁分析来分析在光转化过程中发生的反应类型。结果表明加氧和脱烷基反应是在光转化过程中确定的最常见的反应类型。总的来说,高分辨率质谱与统计分析相结合,可用于了解废水中未知特征的光化学行为。
更新日期:2020-01-14
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