紫外/高锰酸钾高级氧化技术去除饮用水中碘帕醇的特性分析  

Analysis of UV/Permanganate Advanced Oxidation Technology for Iopamidol Removal in Drinking Water

作　　者：高泽晨 GAO Zechen(Shanghai Municipal Engineering Design InstituteCo.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院<集团>有限公司,上海200092

出　　处：《净水技术》2025年第4期56-61,共6页Water Purification Technology

基　　金：上海市青年科技启明星培育(扬帆专项)项目(22YF1444500);上海市政工程设计研究总院(集团)有限公司科研项目(K2022J028A)。

摘　　要：【目的】饮用水源中频繁检出的碘代造影剂已成为供水行业关注的热点,由于水厂常规处理工艺难以有效应对,高级氧化工艺因其氧化能力强而具有潜在的应用前景。【方法】文章系统研究了典型碘代造影剂在紫外/高锰酸钾高级氧化作用下的降解特性,试验选取了碘代造影剂中广泛应用的碘帕醇作为目标污染物,考察了不同pH、高锰酸钾投加量、腐植酸浓度等条件下碘帕醇的降解规律。【结果】结果表明,紫外/高锰酸钾高级氧化技术可快速有效去除水中碘帕醇[拟一级反应速率常数(k_(obs))=0.00371 cm^(2)/mJ],单独紫外和单独高锰酸钾氧化的k_(obs)分别为0.00113 cm^(2)/mJ和0;随着pH值由5.0升高至9.0,碘帕醇降解速率明显变慢(下降了58.42%);不同高锰酸钾投加量下,碘帕醇去除速率随投加量增大而加快,但增幅却明显减缓;不同腐植酸背景浓度下,碘帕醇的降解速率随腐植酸浓度的增加而降低。【结论】紫外/高锰酸钾高级氧化技术的反应机理主要是依靠高锰酸钾光解产生的活性物质的作用,中性和偏酸性条件更有利于紫外/高锰酸钾高级氧化技术降解碘帕醇,但是,具体最佳工艺参数需结合实际工程水质条件进一步试验确定。[Objective]Iodinated contrast medias have been continuously detected in the drinking water sources,which has become a growing concern in the water supply industry.In the context of non-effective treatment by conventional processes in drinking water treatment plants,advanced oxidation processes has potential application prospects due to their strong oxidation ability.[Methods]The degradation of typical iodinated contrast media during the untraviolet(UV)/permanganate advanced oxidation was investigated systematically in this paper.In the experiment,the performance of iopamidol degradation under different experimental conditions(different pH,permanganate dosages and concentrations of humic acid)was studied in detail.[Results]The result showed that the UV/permanganate advanced oxidation technology could effectively degrade iopamidol[psedudo-first-order constants(k_(obs))=0.00371 cm^(2)/mJ],the k_(obs) of UV alone and permanganate oxidation was 0.00113 cm^(2)/mJ and 0,respectively.The degradation rate decreased by 58.42% with pH value increasing from 5.0 to 9.0.Moreover,the higher initial dosage of permanganate was applied,the faster degradation of iopamidol was found.Notably,the degradation rate of iopamidol during the UV/permanganate advanced oxidation was inhibited with the addition of humic acid.[Conclusion]The main reaction mechanism of iopamidol degradation during the UV/permanganate advanced oxidation is due to the formation of reactive species from permanganate photolysis,and the degradation of iopamidol is favored under neutral and acidic conditions.However,the specific optimal parameters need further tests based on actual water quality conditions.

关 键 词：碘帕醇 紫外(UV)/高锰酸钾 高级氧化技术 竞争动力学 饮用水处理 

分 类 号：TU991[建筑科学—市政工程]