Naproxen as a Turn-On Chemiluminescent Probe for Real-Time Quantification of Sulfate Radicals.
Naproxen as a Turn-On Chemiluminescent Probe for Real-Time Quantification of Sulfate Radicals.
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DOI：
10.1021/acs.est.3c01948
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发表时间：
2023-05
影响因子：
11.4
通讯作者：
Huixin Shao;Jie Chen;Jihong Xu;Y. Liu;Hongyu Dong;Junlian Qiao;Xiaohong Guan
中科院分区：
文献类型：
--
作者：
Huixin Shao;Jie Chen;Jihong Xu;Y. Liu;Hongyu Dong;Junlian Qiao;Xiaohong Guan
现有的基于SO 4·-的高级氧化工艺（SR-AOPs）中SO 4·-的识别和定量技术由于其选择性低、可靠性差和实时定量的可行性有限而不能令人满意。本研究以NaCl_3（NAP）为荧光探针，对SR-AOPs中SO_4·-进行了实时定量分析。采用Ce（IV）[Ce（IV）/BS]活化亚硫酸氢盐体系，首次测定了NAP与SO 4·-反应的化学发光产额（ΦCL）为1.49 × 10- 5Emol-1。在此基础上，对Ce（IV）/BS-NAP过程中SO 4·-的最大峰浓度进行了定量计算，结果表明：Ce（IV）/BS-NAP过程中SO 4·-的最大峰浓度为10-11 M。由于NAP与SO 4·-反应的ΦCL远大于与其他活性氧化物种（ROS）反应的ΦCL，因此所开发的CL方法在各种SR-AOPs（例如，过一硫酸盐和过硫酸盐通过铁法活化）。最后，提出NAP向SO 4·-的电子转移是CL生成的关键步骤。该研究为SO 4·-的实时化学发光定量提供了一种新的方法，为SR-AOPs的开发及其在水处理中的应用提供了基础。
Current techniques for identifying and quantifying sulfate radicals (SO4·-) in SO4·--based advanced oxidation processes (SR-AOPs) are unsatisfactory due to their low selectivity, poor reliability, and limited feasibility for real-time quantification. In this study, naproxen (NAP) was employed as a turn-on luminescent probe for real-time quantification of SO4·- in SR-AOPs. The chemiluminescence(CL) yield (ΦCL) of the reaction of NAP with SO4·- was first determined to be 1.49 × 10-5 E mol-1 with the bisulfite activation by cerium(IV) [Ce(IV)/BS] process. Then, the maximum peak concentrations of SO4·- in the Ce(IV)/BS-NAP process was quantified to be ∼10-11 M based on the derived equation. Since ΦCL of the reaction of NAP with SO4·- was much greater than that with other reactive oxidizing species (ROS), the developed CL method worked well in selective quantification of SO4·- in various SR-AOPs (e.g., the activation of peroxymonosulfate and persulfate by iron processes). Finally, the electron transfer from NAP to SO4·- was proposed to be the critical step for CL production. This work provides a novel CL method for real-time quantification of SO4·-, which facilitates the development of SR-AOPs and their application in water and wastewater treatment.