Impact of Reactive Oxygen Species Scavenging on the Intermediate Production of Anthracene and Anthraquinone in Fresh versus Saltwater Environments
Impact of Reactive Oxygen Species Scavenging on the Intermediate Production of Anthracene and Anthraquinone in Fresh versus Saltwater Environments
复制标题
DOI：
10.1002/etc.5687
复制
发表时间：
2023-06
影响因子：
4.1
通讯作者：
Scott J St Romain;L. Basiricò;Yong-ha Kim;Emily Vebrosky Nolan;Wei Xu;K. Armbrust
中科院分区：
文献类型：
--
作者：
Scott J St Romain;L. Basiricò;Yong-ha Kim;Emily Vebrosky Nolan;Wei Xu;K. Armbrust
虽然盐度可以改变疏水有机化合物（hoc）的光降解，但其在海水中改变动力学的原因尚不清楚。由于HOC中间光产物通常比其母体化合物毒性更大，因此需要描述盐环境中中间产物的生成特征，以准确预测其对健康的影响。本文研究了盐度对蒽酮光解生成蒽醌和蒽醌光解生成蒽酮和1 -羟基蒽醌的影响及其与羟基自由基的反应。这是通过测量蒽和蒽醌在去离子水、人工海水、单个海水卤化物（溴化物、氯化物和碘化物）、二甲亚砜、糠醇和过氧化氢溶液中的光解速率和表征它们的产物形成来进行的。盐度通过bbb10因子增强了蒽醌的持久性，并改变了其产物的形成，包括可疑致癌物1‐羟基蒽醌的生成。在某种程度上，这是由于海水成分氯化物和溴化物清除活性氧（ROS）。此外，蒽醌及其羟基化产物被发现与羟基自由基有中等到高度的反应，进一步说明它们在水环境中与ROS发生反应的倾向。本研究强调了考虑盐度对有机污染物降解影响的重要性；它可以显著增强HOCs的持久性并改变其中间形成，从而影响化学品暴露时间和对河口/海洋生物的潜在毒性作用。中国环境科学学报（英文版）；23(2):444 - 444。©2023 setac。
While salinity can alter the photodegradation of hydrophobic organic compounds (HOCs), the cause of their altered kinetics in seawater is not well understood. Because HOC intermediate photoproducts are often more toxic than their parent compounds, characterizing the generation of intermediates in saline environments is needed to accurately predict their health effects. The present study investigated the influence of salinity on the generation of anthraquinone through the photolysis of anthracene and the generation of anthrone and 1‐hydroxyanthraquinone from the photolysis of anthraquinone as well as their reactivities with hydroxyl radicals. This was conducted by measuring the photolysis rates of anthracene and anthraquinone and characterizing their product formation in buffered deionized water, artificial seawater, individual seawater halides (bromide, chloride, and iodide), dimethyl sulfoxide, furfuryl alcohol, and solutions of hydrogen peroxide. Salinity enhanced the persistence of anthraquinone by a factor >10 and altered its product formation, including the generation of the suspected carcinogen 1‐hydroxyanthraquinone. In part, this was attributed to reactive oxygen species (ROS) scavenging by the seawater constituents chloride and bromide. In addition, anthraquinone and its hydroxylated products were found to be moderately to highly reactive with hydroxyl radicals, further illustrating their tendency to react with ROS in aqueous environments. The present study emphasizes the importance of considering the effects of salinity on organic contaminant degradation; it can significantly enhance the persistence of HOCs and alter their intermediate formation, subsequently impacting chemical exposure times and potential toxic effects on estuarine/marine organisms. Environ Toxicol Chem 2023;42:1721–1729. © 2023 SETAC.