DOI: 10.1016/j.watres.2017.10.067
Scopus记录号: 2-s2.0-85037974317
论文题名: Degradation of perfluorinated compounds by sulfate radicals – New mechanistic aspects and economical considerations
作者: Lutze H.V. ; Brekenfeld J. ; Naumov S. ; von Sonntag C. ; Schmidt T.C.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129 起始页码: 509
结束页码: 519
语种: 英语
英文关键词: Energy demand
; Perfluorinated compounds
; PFOA
; Reaction mechanism
; Sulfate radicals
; Trifluoroacetic acid
; Water treatment
Scopus关键词: Chains
; Energy management
; Free radical reactions
; Kinetics
; Photolysis
; Propionic acid
; Quantum chemistry
; Reaction kinetics
; Sulfur compounds
; Trifluoroacetic acid
; Water pollution
; Energy demands
; Perfluorinated compounds
; PFOA
; Reaction mechanism
; Sulfate radicals
; Water treatment
; acetic acid
; butyric acid
; carbon
; hydroxyl radical
; organofluorine derivative
; perfluoro compound
; propionic acid
; radical
; sulfate
; sulfate
; sulfate radical
; water
; acetic acid
; degradation
; hydroxyl radical
; organic compound
; photolysis
; power generation
; reaction kinetics
; sulfate
; water treatment
; Article
; chemical reaction kinetics
; degradation
; economic aspect
; energy
; mineralization
; photolysis
; priority journal
; quantum chemistry
; reaction analysis
; simulation
; ultraviolet radiation
; water pollutant
; water treatment
; analysis
; chemistry
; economics
; kinetics
; oxidation reduction reaction
; procedures
; water management
; water quality
; Kinetics
; Oxidation-Reduction
; Photolysis
; Sulfates
; Water
; Water Pollutants, Chemical
; Water Purification
; Water Quality
英文摘要: Perfluorinated organic compounds (PFC) are an important group of pollutants, which are difficult to be degraded in conventional water treatment. Even hydroxyl radical based processes are not capable to degrade these compounds. Sulfate radicals can oxidize a group of PFC, i.e., perfluorinated carboxylic (PFCAs) acids. However, information in literature on kinetics and reaction mechanism is largely based on model simulations which are prone to errors. The present study provides mechanistic insights based on product formation, material balances, competition kinetics experiments and quantum chemical calculations. Furthermore, energy requirements for sulfate radical based degradation of PFCA is evaluated in the present study. PFCAs can be partly mineralized in chain reactions initiated by sulfate radicals (SO4 [rad]─). The perfluorinated acetic acid (TFA), propionic acid, and butanoic acid are largely degraded in a primary reaction with sulfate radicals. In case of PFCA with a chain length of > 4 carbons low yields of PFCA products were observed. Regarding reaction kinetics sulfate radicals react very slow with PFCAs (≈ 104 M−1 s−1). Thus, the energy demand required for generation of SO4 [rad]─ by photolysis of S2O8 2─ (UV/S2O8 2−) is very high. A 90% degradation of a PFCA by UV/S2O8 2− was estimated to be 55 kW h m−3 in pure water. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113077
Appears in Collections: 气候减缓与适应
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作者单位: University of Duisburg-Essen, Faculty of Chemistry, Instrumental Analytical Chemistry, Universitätsstraße 5, Essen, D-45141, Germany; IWW Water Centre, Moritzstraße 26, Mülheim an der Ruhr, 45476, Germany; Centre for Water and Environmental Research (ZWU), Universitätsstraße 5, Essen, 45141, Germany; Leibniz-Institut für Oberflächenmodifizierung e. V., Permoserstr. 15, Leipzig, 04318, Germany
Recommended Citation:
Lutze H.V.,Brekenfeld J.,Naumov S.,et al. Degradation of perfluorinated compounds by sulfate radicals – New mechanistic aspects and economical considerations[J]. Water Research,2018-01-01,129