使用铝+酸+过氧化氢制备的含羟基自由基滤液用于去除有机污染物。
Filtrates with Hydroxyl Radicals Prepared using Al + Acid + HO for Removing Organic Pollutants.
作者信息
Guo Xiao-Han, Yang Yang, Deng Zhen-Yan
机构信息
Energy Materials & Physics Group, Department of Physics, Shanghai University, Shanghai 200444, China.
Institute of Low-Dimensional Carbon and Device Physics, Shanghai University, Shanghai 200444, China.
出版信息
ACS Omega. 2021 May 26;6(22):14182-14190. doi: 10.1021/acsomega.1c00801. eCollection 2021 Jun 8.
In this work, for the first time, high-activity filtrates were prepared by the reaction of aluminum (Al) powder with hydrogen peroxide (HO) in acidic solution and then filtration, which were used to degrade various organic pollutants such as phenol, methyl orange, and bisphenol A. It was found that the filtrates can effectively degrade and mineralize various organic pollutants and have a high efficiency comparable to their parent Al + acid + HO suspensions. The filtrates can keep their high activity for several weeks under ambient conditions, and the activity depends on their initial pH value. At a pH value of ∼3.5, the reaction activity of filtrates is the best. Electron spin resonance spectroscopy (ESR) analyses indicated that there is a large quantity of stable hydroxyl radicals (OH) existing in the filtrates, which are responsible for the removal of organic pollutants. Furthermore, the related factors are discussed.
在本研究中，首次通过铝粉与过氧化氢在酸性溶液中反应，然后过滤制备了高活性滤液，用于降解苯酚、甲基橙和双酚A等多种有机污染物。结果发现，这些滤液能够有效降解并矿化各种有机污染物，且具有与母液（铝+酸+过氧化氢悬浮液）相当的高效率。滤液在环境条件下可保持数周的高活性，其活性取决于初始pH值。在pH值约为3.5时，滤液的反应活性最佳。电子自旋共振光谱（ESR）分析表明，滤液中存在大量稳定的羟基自由基（·OH），这些自由基负责去除有机污染物。此外，还对相关因素进行了讨论。
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