Evaluating iopamidol degradation performance and potential dual-wavelength synergy by UV-LED irradiation and UV-LED/chlorine treatment
Evaluating iopamidol degradation performance and potential dual-wavelength synergy by UV-LED irradiation and UV-LED/chlorine treatment
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通过 UV-LED 照射和 UV-LED/氯处理评估碘帕醇的降解性能和潜在的双波长协同作用
DOI：
10.1016/j.cej.2018.12.022
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发表时间：
2019-03
影响因子：
15.1
通讯作者：
Gao Naiyun
中科院分区：
文献类型：
--
作者：
Gao Zechen;Lin Yili;Xu Bin;Xia Ying;Hu Chenyan;Cao Tongcheng;Zou Xiangyun;Gao Naiyun
本研究揭示了碘帕醇的降解性能和双波长紫外发光二极管（UV-LED）的协同效应。结果发现，在单独的UV-LED和UV-LED/氯过程中，双波长照射（265和280 nm）可以促进碘帕醇降解（p< 0.05）。研究了UV-LED/氯气工艺中pH值、氯气投加量、水基质等关键实验参数对UV-LED/氯气工艺的影响。由于水中氯的光解量子产率（Φ Cl）和氯的吸收率的综合影响，在pH 7.0时降解率最高。采用超高效液相色谱-电喷雾质谱联用技术研究了碘帕醇在UV-LED/氯气工艺中的降解途径。此外，碘化三卤甲烷（I-THM）的形成，在随后的氯化之间的Milli-Q和真实的水与延长照射时间的相反的趋势被观察到，而其他检测到的消毒副产物（DBP）的形成在Milli-Q和真实的沃茨显示出相同的变化。采用双波长的UV-LED/氯处理可以显著提高碘帕醇的降解率，但也会促进真实的水中I-THM的生成，这表明在UV-LED/氯处理饮用水之前需要对消毒副产物进行评估。
This study revealed the iopamidol degradation performance and the synergistic effect of dual-wavelength ultraviolet light-emitting diodes (UV-LEDs). It was found that the dual-wavelength irradiation (265 and 280 nm) can promote iopamidol degradation during both UV-LED alone and UV-LED/chlorine processes (p< 0.05). The effects of key experimental parameters including pH, chlorine dosage and water matrix during UV-LED/chlorine process were evaluated. Peak degradation rate was observed at pH 7.0 due to the combined effects of the quantum yield of aquatic chlorine photolysis (Φchlorine) and absorptivity of chlorine. The destruction pathways of iopamidol in the UV-LED/chlorine process were proposed by Ultra Performance Liquid Chromatography-Electrospray Ionization-mass spectrometry. Additionally, an opposite trend of iodinated trihalomethane (I-THM) formation during subsequent chlorination between Milli-Q and real waters with prolonging irradiation time was observed, while other detected disinfection by-product (DBP) formation showed the same variation in Milli-Q and real waters. The UV-LED/chlorine treatment using dual-wavelength can enhance iopamidol degradation significantly, but it also promoted I-THM formation in real water, indicating the need for evaluating DBPs before the application of UV-LED/chlorine process in drinking water treatment.
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影响因子：
11.4
作者：
Kormos, Jennifer Lynne;Schulz, Manoj;Ternes, Thomas A.
通讯作者：
Ternes, Thomas A.
影响因子：
1.8
作者：
Bolton, JR;Bircher, KG;Tolman, CA
通讯作者：
Tolman, CA
DOI：
--
发表时间：
1978
期刊：
--
影响因子：
--
作者：
K. K. Rohatgi-Mukherjee-K.
通讯作者：
K. K. Rohatgi-Mukherjee-K.
影响因子：
11.4
作者：
TREHY, ML;YOST, RA;MILES, CJ
通讯作者：
MILES, CJ
影响因子：
12.8
作者：
Wang, Ding;Bolton, James R.;Hofmann, Ron
通讯作者：
Hofmann, Ron