UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors

Ultraviolet-activated permanganate (UV/PM) process is a novel advanced oxidation process (AOP), but its application potential remains to be evaluated. This work investigates the degradation of refractory organic pollutant by UV/PM in terms of efficiency, mechanism, and influencing factors. The targe...

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Autores principales:	Miaomiao Ye, Chengzhuo Li, Xiaowei Liu, Lili Wang, Rong Chen
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	active manganese species hydroxyl radical permanganate uv activation Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/5e67250f4bf049e6adb63b3ee91998ac
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spelling	oai:doaj.org-article:5e67250f4bf049e6adb63b3ee91998ac2021-11-06T10:52:17ZUV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors0273-12231996-973210.2166/wst.2021.068https://doaj.org/article/5e67250f4bf049e6adb63b3ee91998ac2021-03-01T00:00:00Zhttp://wst.iwaponline.com/content/83/6/1278https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Ultraviolet-activated permanganate (UV/PM) process is a novel advanced oxidation process (AOP), but its application potential remains to be evaluated. This work investigates the degradation of refractory organic pollutant by UV/PM in terms of efficiency, mechanism, and influencing factors. The target compound benzoic acid (BA), which is a micro-organic pollutant and is resistant to PM and UV treatment, can be efficiently degraded by UV/PM. The electron paramagnetic resonance spectra directly supported the formation of hydroxyl radical (HO•) and superoxide radical from UV photolysis of PM. Competitive kinetics experiments verified that acted as precursor of HO• and the good degradation performance of BA was due to the involvement of HO• and manganese(V). The rate constants of BA degradation showed a positive linear relationship with PM dosage in the range of 0.5–20 mg·L−1, and the degradation process was significantly influenced by solution pH and natural organic matters but insensitive to chloride and bicarbonate at environmentally relevant concentrations. Compared to the typical UV-based AOP UV/hydrogen peroxide, UV/PM is a little inferior, indicating that optimization and enhancement is needed for this process before its possible practical application. HIGHLIGHTS The mechanism of HO• generation from photolysis of PM was parsed.; The effects of operating parameters (e.g. PM dosage, pH, natural organic matters, alkalinity, and chloride) on UV/PM process were investigated.; UV/PM process was compared with UV/H2O2.; Optimization and enhancement is needed for UV/PM process before its possible practical application.;Miaomiao YeChengzhuo LiXiaowei LiuLili WangRong ChenIWA Publishingarticleactive manganese specieshydroxyl radicalpermanganateuv activationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 6, Pp 1278-1285 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	active manganese species hydroxyl radical permanganate uv activation Environmental technology. Sanitary engineering TD1-1066
spellingShingle	active manganese species hydroxyl radical permanganate uv activation Environmental technology. Sanitary engineering TD1-1066 Miaomiao Ye Chengzhuo Li Xiaowei Liu Lili Wang Rong Chen UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors
description	Ultraviolet-activated permanganate (UV/PM) process is a novel advanced oxidation process (AOP), but its application potential remains to be evaluated. This work investigates the degradation of refractory organic pollutant by UV/PM in terms of efficiency, mechanism, and influencing factors. The target compound benzoic acid (BA), which is a micro-organic pollutant and is resistant to PM and UV treatment, can be efficiently degraded by UV/PM. The electron paramagnetic resonance spectra directly supported the formation of hydroxyl radical (HO•) and superoxide radical from UV photolysis of PM. Competitive kinetics experiments verified that acted as precursor of HO• and the good degradation performance of BA was due to the involvement of HO• and manganese(V). The rate constants of BA degradation showed a positive linear relationship with PM dosage in the range of 0.5–20 mg·L−1, and the degradation process was significantly influenced by solution pH and natural organic matters but insensitive to chloride and bicarbonate at environmentally relevant concentrations. Compared to the typical UV-based AOP UV/hydrogen peroxide, UV/PM is a little inferior, indicating that optimization and enhancement is needed for this process before its possible practical application. HIGHLIGHTS The mechanism of HO• generation from photolysis of PM was parsed.; The effects of operating parameters (e.g. PM dosage, pH, natural organic matters, alkalinity, and chloride) on UV/PM process were investigated.; UV/PM process was compared with UV/H2O2.; Optimization and enhancement is needed for UV/PM process before its possible practical application.;
format	article
author	Miaomiao Ye Chengzhuo Li Xiaowei Liu Lili Wang Rong Chen
author_facet	Miaomiao Ye Chengzhuo Li Xiaowei Liu Lili Wang Rong Chen
author_sort	Miaomiao Ye
title	UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors
title_short	UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors
title_full	UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors
title_fullStr	UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors
title_full_unstemmed	UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors
title_sort	uv-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/5e67250f4bf049e6adb63b3ee91998ac
work_keys_str_mv	AT miaomiaoye uvactivatedpermanganateprocessformicroorganicpollutantdegradationefficiencymechanismandinfluencingfactors AT chengzhuoli uvactivatedpermanganateprocessformicroorganicpollutantdegradationefficiencymechanismandinfluencingfactors AT xiaoweiliu uvactivatedpermanganateprocessformicroorganicpollutantdegradationefficiencymechanismandinfluencingfactors AT liliwang uvactivatedpermanganateprocessformicroorganicpollutantdegradationefficiencymechanismandinfluencingfactors AT rongchen uvactivatedpermanganateprocessformicroorganicpollutantdegradationefficiencymechanismandinfluencingfactors
_version_	1718443732014989312

UV-activated permanganate process for micro-organic pollutant degradation: efficiency, mechanism and influencing factors

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