高级氧化技术中自由基的检测技术和方法研究进展

Advances on Determination Methods of Free Radicals in Advanced Oxidation Processes

高级氧化技术是目前难降解有机污染物处理方法中应用最广泛的技术,强氧化性自由基的产生是其中的关键过程,定性定量分析在该过程中产生的自由基成为必需手段。该文综述了目前高级氧化法中自由基检测方法的现状,包括电子自旋/顺磁共振法(ESR/EPR)、高效液相色谱法(HPLC)、分光光度法、荧光光谱法和电化学法等,从定性定量分析的准确性、精确性和选择性等角度,分析评估了各检测方法的优势和不足,并提出了高级氧化法中自由基检测技术和方法今后的研究和应用方向。

Advanced oxidation processes(AOPs)are widely applied to the treatment of organic pollutes,especially the treatment to the pollute that is hard to be removed by other methods.It is necessary to conduct qualitative and quantitative analyses on free radicals as the formation of strong oxidizing free radicals is the key factor in AOPs.An overview on the determination methods for free radicals generated from AOPs is provided in this paper,which include electron spin/paramagnetic resonance,high performance liquid chromatography,spectrophotometry,fluorescent spectrometry and electrochemical methods.The advantages and disadvantages of these methods are elaborated by comparing their veracity,accuracy and selectivity in qualitative and quantitative analysis processes.Finally,the perspectives for the development and application of these methods are further proposed in the paper.