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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1016/j.cej.2020.125570
|2 doi
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|a pubmed25n1036.xml
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|a (DE-627)NLM310880149
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|a (NLM)32508521
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Tian, Fu-Xiang
|e verfasserin
|4 aut
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| 245 |
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|a Comparison of UV-induced AOPs (UV/Cl2, UV/NH2Cl, UV/ClO2 and UV/H2O2 ) in the degradation of iopamidol
|b Kinetics, energy requirements and DBPs-related toxicity in sequential disinfection processes
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 16.02.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2020 Elsevier B.V. All rights reserved.
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|a The UV-induced advanced oxidation processes (AOPs, including UV/Cl2, UV/NH2Cl, UV/ClO2 and UV/H2O2 ) degradation kinetics and energy requirements of iopamidol as well as DBPs-related toxicity in sequential disinfection were compared in this study. The photodegradation of iopamidol in these processes can be well described by pseudo-first-order model and the removal efficiency ranked in descending order of UV/Cl2 > UV/H2O2 > UV/NH2Cl > UV/ClO2 > UV. The synergistic effects could be attributed to diverse radical species generated in each system. Influencing factors of oxidant dosage, UV intensity, solution pH and water matrixes (Cl- , NH4 + and nature organic matter) were evaluated in detail. Higher oxidant dosages and greater UV intensities led to bigger pseudo-first-order rate constants (Kobs) in these processes, but the pH behaviors exhibited quite differently. The presence of Cl- , NH4 + and nature organic matter posed different effects on the degradation rate. The parameter of electrical energy per order (EE/O) was adopted to evaluate the energy requirements of the tested systems and it followed the trend of UV/ClO2 > UV > UV/NH2Cl > UV/H2O2 > UV/Cl2 . Pretreatment of iopamidol by UV/Cl2 and UV/NH2Cl clearly enhanced the production of classical disinfection by-products (DBPs) and iodo-trihalomethanes (I-THMs) during subsequent oxidation while UV/ClO2 and UV/H2O2 exhibited almost elimination effect. From the perspective of weighted water toxicity, the risk ranking was UV/NH2Cl > UV/Cl2 > UV > UV/H2O2 > UV/ClO2 . Among the discussed UV-driven AOPs, UV/Cl2 was proved to be the most cost-effective one for iopamidol removal while UV/ClO2 displayed overwhelming advantages in regulating the water toxicity associated with DBPs, especially I-THMs. The present results could provide some insights into the application of UV-activated AOPs technologies in tradeoffs between cost-effectiveness assessment and DBPs-related toxicity control of the disinfected waters containing iopamidol
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|a Journal Article
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|a Degradation
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|a Electrical energy per order (EE/O)
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|a Iodo-trihalomethanes (I-THMs)
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|a Iopamidol
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|a Toxicity
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| 650 |
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|a UV-based advanced oxidation processes (AOPs)
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| 700 |
1 |
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|a Ye, Wen-Kai
|e verfasserin
|4 aut
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| 700 |
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|a Xu, Bin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hu, Xiao-Jun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ma, Shi-Xu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lai, Fan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gao, Yu-Qiong
|e verfasserin
|4 aut
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| 700 |
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|a Xing, Hai-Bo
|e verfasserin
|4 aut
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| 700 |
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|a Xia, Wei-Hong
|e verfasserin
|4 aut
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| 700 |
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|a Wang, Bo
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Chemical engineering journal (Lausanne, Switzerland : 1996)
|d 1999
|g 398(2020) vom: 15. Okt., Seite 125570
|w (DE-627)NLM098273531
|x 1385-8947
|7 nnas
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| 773 |
1 |
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|g volume:398
|g year:2020
|g day:15
|g month:10
|g pages:125570
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| 856 |
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|u http://dx.doi.org/10.1016/j.cej.2020.125570
|3 Volltext
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