DOI: 10.1016/j.watres.2018.11.044
Scopus记录号: 2-s2.0-85057496796
论文题名: Effects of water matrices on the degradation of naproxen by reactive radicals in the UV/peracetic acid process
作者: Chen S. ; Cai M. ; Liu Y. ; Zhang L. ; Feng L.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 153
结束页码: 161
语种: 英语
英文关键词: Naproxen
; Reactive radicals
; Real water matrices
; UV/peracetic acid process
Scopus关键词: Chlorine compounds
; Acid process
; Advanced oxidation
; Advanced Oxidation Processes
; Carbon-centered radicals
; Naproxens
; Reactive radicals
; Scavenging capacity
; Water matrices
; Naphthalene
; bicarbonate
; carbonic acid
; chloride
; humic acid
; hydrogen peroxide
; naphthalene
; naproxen
; peracetic acid
; radical
; water
; acetic acid
; chemical compound
; concentration (composition)
; degradation
; inhibition
; oxidation
; radical
; scavenging (chemistry)
; ultraviolet radiation
; water treatment
; Article
; chemical structure
; degradation
; oxidation
; priority journal
; ultraviolet radiation
英文摘要: The UV/peracetic acid (UV/PAA) process as a novel advanced oxidation process has been reported to produce carbon-centered radicals (R–C•) for Naproxen (NAP) degradation, which is a representative of naphthyl structure substances. Real water matrices, such as carbonate and bicarbonate ions (CO 3 2− /HCO 3 − ), humic acid (HA), and chloride ion (Cl − ), may react with these reactive radicals and change their contributions to NAP degradation. The results showed that R–C• contributed 60.8% and •OH contributed 39.2% to NAP degradation in pure water by a competition method. CO 3 2− /HCO 3 − (0–20 mM) showed minimal effect on NAP degradation in the UV/PAA process, meanwhile, it has observable inhibition effect on NAP degradation in the UV/H 2 O 2 process (mainly of •OH) and minimal effect in the UV/PAA process with tert-butanol (TBA) (mainly of R–C•). Results suggested that CO 3 2− /HCO 3 − could react with •OH yielding CO 3 • - with low reactivity to NAP, CO 3 • - could further react with PAA to produce R–C•. This speculation was confirmed by the increased contribution of R–C• to NAP degradation with the increase of CO 3 2− /HCO 3 − concentration through the competition method. HA (0–5 mg/L) had a higher scavenging capacity for R–C• than •OH because HA with naphthyl structure was likely to be attacked by R–C•. Cl − (0–200 mM) had little effect on NAP degradation in the UV/PAA and UV/H 2 O 2 processes, while exerted an observable inhibition on NAP degradation in the UV/PAA process with TBA. This finding suggested that Cl − could react with R–C• to produce Cl•, which could further convert into HOCl• - , and then excess •OH was formed. The new knowledge on the conversion of reactive radicals obtained in this study provides an important basis for facilitating further research on the UV/PAA advanced oxidation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122099
Appears in Collections: 气候变化事实与影响
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作者单位: Beijing Key Laboratory for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
Recommended Citation:
Chen S.,Cai M.,Liu Y.,et al. Effects of water matrices on the degradation of naproxen by reactive radicals in the UV/peracetic acid process[J]. Water Research,2019-01-01