Acetaminophen degradation in aqueous solution by the UV-LED-EC/Cl2 process

In this study, electrochemically generated free chlorine (EC/Cl2) was activated by UV irradiation with a light emitting diode (LED) lamp at 275 nm to degrade acetaminophen (AAP, 2 μM) in aqueous solution. The potential at a RuO2-IrO2/Ti plate anode was set at 1.5 V vs. the Ag/AgCl electrode. Chlorin...

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Détails bibliographiques
Publié dans:Environmental technology. - 1993. - 44(2023), 7 vom: 13. März, Seite 1035-1046
Auteur principal: Sun, Na (Auteur)
Autres auteurs: Wang, Xianglian, Liu, Zhanmeng
Format: Article en ligne
Langue:English
Publié: 2023
Accès à la collection:Environmental technology
Sujets:Journal Article UV-LED acetaminophen acute toxicity degradation pathway mineralization Chlorine 4R7X1O2820 Acetaminophen 362O9ITL9D plus... Water Pollutants, Chemical Water 059QF0KO0R Chlorides
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520 |a In this study, electrochemically generated free chlorine (EC/Cl2) was activated by UV irradiation with a light emitting diode (LED) lamp at 275 nm to degrade acetaminophen (AAP, 2 μM) in aqueous solution. The potential at a RuO2-IrO2/Ti plate anode was set at 1.5 V vs. the Ag/AgCl electrode. Chlorine was in situ generated in the presence of Cl at the anode and then it was transformed into various active species such as OH and reactive chlorine species (RCS) under UV-LED irradiation. The degradation of AAP was investigated using batch tests, evaluating the influence of different experimental conditions such as NaCl concentration, phosphate buffer saline concentration, irradiation time and solution pH, keeping constant the UV-LED power and temperature. Results show that AAP could be completely degraded by the hybrid process with a high mineralization ratio (73%), and the degradation process followed a pseudo-first-order kinetics. The value of the Electric Energy per Order (EEO) = 1.272 kWh m3 order?, which is lower than the energy consumption of some other UV-based processes for AAP degradation. Adding 1 mM HCO3 ions slightly decreased the rate of AAP degradation. Luminescent bacteria experiment revealed that the acute toxicity of the reacted solution could be greatly reduced and the ecological risk was effectively abated. The scavenging assay shows that RCS plays a key role in the AAP degradation. The intermediate products were identified, and possible degradation routes were proposed. The system can advantageously replace conventional UV mercury lamp based ones in the degradation of microorganic pollutants 
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650 4 |a UV-LED 
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650 4 |a acute toxicity 
650 4 |a degradation pathway 
650 4 |a mineralization 
650 7 |a Chlorine  |2 NLM 
650 7 |a 4R7X1O2820  |2 NLM 
650 7 |a Acetaminophen  |2 NLM 
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650 7 |a Chlorides  |2 NLM 
700 1 |a Wang, Xianglian  |e verfasserin  |4 aut 
700 1 |a Liu, Zhanmeng  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Environmental technology  |d 1993  |g 44(2023), 7 vom: 13. März, Seite 1035-1046  |w (DE-627)NLM098202545  |x 1479-487X  |7 nnas 
773 1 8 |g volume:44  |g year:2023  |g number:7  |g day:13  |g month:03  |g pages:1035-1046 
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