State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, 400715, China; Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Science, Beijing, 100097, China.
Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Science, Beijing, 100097, China.
Environ Pollut. 2024 Dec 1;362:124924. doi: 10.1016/j.envpol.2024.124924. Epub 2024 Sep 13.
Ferryl ions (Fe(IV)) are often thought to play an important role in iron-based advanced oxidation processes (AOPs), and their presence is typically inferred through the unique pathway of methyl phenyl sulfoxide (PMSO) conversion to methyl phenyl sulfone (PMSO). Here, we first employed probe method by degrading the mixed system containing PMSO, benzoic acid (BA), nitrobenzene (NB) to analyze the steady-state concentration of Fe (IV) in the iron-based heterogeneous persulfate reaction system. In addition, studies were conducted on the direct oxidation of PMSO by different oxidants under different pH conditions, and the results showed that peroxymonosulfate (PMS), sodium hypochlorite (NaClO) and sodium periodate (PI) can directly oxidize PMSO and convert it into PMSO. Furthermore, the influence of different types of iron salts and biomass on the prepared iron-biochar (Fe-BC) for the activation of persulfate on degradation of PMSO and the formation of PMSO was also investigated. This study may provide new insights into the use of PMSO as a probe for the analysis of Fe(IV) in heterogeneous reaction systems.
亚铁离子（Fe(IV)）通常被认为在基于铁的高级氧化过程（AOPs）中发挥重要作用，其存在通常通过甲磺酸苯酯（PMSO）转化为苯磺酸甲酯（PMSO）的独特途径来推断。在这里，我们首先通过降解含有 PMSO、苯甲酸（BA）、硝基苯（NB）的混合体系，采用探针法来分析铁基非均相过硫酸盐反应体系中 Fe(IV)的稳态浓度。此外，我们还在不同 pH 条件下研究了不同氧化剂对 PMSO 的直接氧化作用，结果表明过一硫酸盐（PMS）、次氯酸钠（NaClO）和高碘酸钠（PI）可以直接氧化 PMSO 并将其转化为 PMSO。此外，还研究了不同类型的铁盐和生物质对制备的铁生物炭（Fe-BC）在过硫酸盐活化降解 PMSO 和生成 PMSO 方面的影响。这项研究可能为使用 PMSO 作为探针分析非均相反应体系中的 Fe(IV)提供新的思路。
