| DOI: | 10.1016/j.watres.2017.11.041
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| Scopus记录号: | 2-s2.0-85037606147
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| 论文题名: | Low levels of iron enhance UV/H2O2 efficiency at neutral pH |
| 作者: | Ulliman S.L.; McKay G.; Rosario-Ortiz F.L.; Linden K.G.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2018
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| 卷: | 130 | | 起始页码: | 234
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| 结束页码: | 242
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| 语种: | 英语
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| 英文关键词: | Hydroxyl radical (HO[rad])
; Micropollutants
; Photo-Fenton
; UV advanced oxidation process (UV/AOP)
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| Scopus关键词: | Carbon
; Chemicals removal (water treatment)
; Efficiency
; Iron
; Oxidation
; Oxidation resistance
; Photodegradation
; Photolysis
; Potable water
; Water
; Advanced Oxidation Processes
; Drinking water standards
; Hydroxyl radicals
; Micropollutants
; N-nitrosodimethylamine
; Oxidation potentials
; Photo-Fenton
; Steady state concentration
; Iron compounds
; 4 chlorobenzoic acid
; carbamazepine
; drinking water
; hydrogen peroxide
; hydroxyl radical
; iron
; well water
; 4-chlorobenzoic acid
; carbamazepine
; chlorobenzoic acid derivative
; dimethylnitrosamine
; hydrogen peroxide
; iron
; chemical compound
; chemical reaction
; concentration (composition)
; degradation
; drag coefficient
; drinking water
; efficiency measurement
; hydrogen peroxide
; hydroxyl radical
; iron
; oxidation
; pH
; photolysis
; pollutant
; pollutant removal
; steady-state equilibrium
; ultraviolet radiation
; well water
; Article
; concentration at steady-state
; controlled study
; degradation kinetics
; oxidation
; oxidation reduction potential
; pH
; photolysis
; priority journal
; ultraviolet radiation
; water quality
; chemistry
; oxidation reduction reaction
; procedures
; radiation response
; water management
; water pollutant
; Carbamazepine
; Chlorobenzoates
; Dimethylnitrosamine
; Hydrogen Peroxide
; Hydroxyl Radical
; Iron
; Oxidation-Reduction
; Photolysis
; Ultraviolet Rays
; Water Pollutants, Chemical
; Water Purification
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| 英文摘要: | While the presence of iron is generally not seen as favorable for UV-based treatment systems due to lamp fouling and decreased UV transmittance, we show that low levels of iron can lead to improvements in the abatement of chemicals in the UV-hydrogen peroxide advanced oxidation process. The oxidation potential of an iron-assisted UV/H2O2 (UV254 + H2O2 + iron) process was evaluated at neutral pH using iron levels below USEPA secondary drinking water standards (<0.3 mg/L). Para-chlorobenzoic acid (pCBA) was used as a hydroxyl radical (HO[rad]) probe to quantify HO[rad] steady state concentrations. Compounds degraded by different mechanisms including, carbamazepine (CBZ, HO[rad] oxidation) and N-nitrosodimethylamine (NDMA, direct photolysis), were used to investigate the effect of iron on compound degradation for UV/H2O2 systems. The effects of iron species (Fe2+ and Fe3+), iron concentration (0–0.3 mg/L), H2O2 concentration (0–10 mg/L) and background water matrix (low-carbon tap (LCT) and well water) on HO[rad] production and compound removal were examined. Iron-assisted UV/H2O2 efficiency was most influenced by the target chemical and the water matrix. Added iron to UV/H2O2 was shown to increase the steady-state HO[rad] concentration by approximately 25% in all well water scenarios. While CBZ removal was unchanged by iron addition, 0.3 mg/L iron improved NDMA removal rates in both LCT and well water matrices by 15.1% and 4.6% respectively. Furthermore, the combination of UV/Fe without H2O2 was also shown to enhance NDMA removal when compared to UV photolysis alone indicating the presence of degradation pathways other than HO[rad] oxidation. © 2017 Elsevier Ltd |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/113062
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Civil, Environmental, Architectural Engineering, University of Colorado Boulder, 4001 Discovery Drive, Boulder, CO 80303, United States
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| Recommended Citation: | |
Ulliman S.L.,McKay G.,Rosario-Ortiz F.L.,et al. Low levels of iron enhance UV/H2O2 efficiency at neutral pH[J]. Water Research,2018-01-01,130
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