激进的
化学
羟基自由基
分光光度法
水杨酸
过氧化氢
光化学
无机化学
核化学
有机化学
色谱法
生物化学
作者
Ever Peralta-Reyes,Gabriela Roa‐Morales,José Antonio Hernández Servín,Rubı́ Romero,Patricia Balderas-Hernández,Reyna Natividad
标识
DOI:10.1016/j.electacta.2014.02.047
摘要
Hydroxilation of aromatic compounds is an oxidative process that has been employed as indirect method to quantify the produced hydroxyl radicals during an advanced oxidation process (●OH). This is usually complicated by the radical high reactivity and short life time and therefore a scavenging agent such as salicylic acid is commonly employed. This usually implies a rather sophisticated analytical method such as chromatography. In this work, however, a relatively simple and low cost method is proposed to achieve the aforementioned objective. This method is based on UV-Vis spectrophotometry and was employed to quantify the hydroxyl radicals produced during the electrochemical oxidation of water when employing a platinum anode in a galvanostatic type process. Salicylic acid was employed as ●OH scavenger. The concentration of the hydroxilated resulting products, 2,3-dihidroxybenzoic Acid and 2,5-dihydroxibenzoic Acid, was determined by UV-Vis Spectroscopy and utilized to quantify the hydroxyl radicals. In addition, mineralization was followed by Chemical Oxygen Demmand measurements.
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