DOI: 10.1016/j.watres.2018.10.076
Scopus记录号: 2-s2.0-85056240404
论文题名: Chlorella vulgaris enhance the photodegradation of chlortetracycline in aqueous solution via extracellular organic matters (EOMs): Role of triplet state EOMs
作者: Tian Y. ; Zou J. ; Feng L. ; Zhang L. ; Liu Y.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 35
结束页码: 41
语种: 英语
英文关键词: Algae
; Chlortetracycline
; Extracellular organic matters
; Photodegradation
; Triplet states
Scopus关键词: Biogeochemistry
; Biological materials
; Energy transfer
; Organic compounds
; Photodegradation
; Photolysis
; Rate constants
; Solutions
; 2 ,4 ,6-trimethylphenol
; Chlorella vulgaris
; Chlortetracycline
; Electron transfer
; Extracellular organic matters
; Photodegradation rate
; Steady state concentration
; Triplet state
; Algae
; chlorophyll
; chlortetracycline
; enzyme
; extracellular organic matter
; hydroxyl group
; organic matter
; oxygen
; phenol derivative
; unclassified drug
; alga
; antibiotics
; aqueous solution
; chemical compound
; chemical reaction
; electron
; organic matter
; photodegradation
; photolysis
; pollutant removal
; surface water
; transformation
; aqueous solution
; Article
; Chlorella vulgaris
; concentration at steady-state
; controlled study
; electron transport
; light intensity
; nonhuman
; photochemistry
; photodegradation
; photolysis
; photosensitization
; priority journal
; rate constant
; species
; sunlight
; algae
; Chlorella vulgaris
英文摘要: Algae, which are ubiquitous in surface waters (e.g., lakes, ponds, wetlands) may play an important role in sunlight-driven transformation of compounds. This study is to investigate the role of algae (Chlorella Vulgaris) in chlortetracycline (CTC) photolysis and explore the photosensitive mechanism. The algae were found to significantly accelerate the photodegradation rate of CTC and extracellular organic matters (EOMs) were confirmed to be the major active substances. Triplet state EOMs ( 3 EOMs*) were verified to be the dominant reactive species with 93% contribution to the indirect photodegradation rate of CTC, while ·OH and 1 O 2 contributed minor (7%). The steady-state concentration of 3 EOMs* was determined by probe compounds (2,4,6-trimethylphenol) to be 3.50 × 10 −14 –1.88 × 10 −13 M with the increase of EOMs from 2.0 to 8.0 mg L −1 . The rate constant for reaction of 3 EOMs* with CTC was calculated to be 3.17 × 10 9 M −1 s −1 . 3 EOMs* were found to react with CTC mainly via electron transfer, on basis of susceptible reaction of 3 EOMs* with the hydroxyl and amidogen groups in CTC. In addition, the energy transfer of 3 EOMs* to CTC was possible according to the higher energy of 3 EOMs* than that of triplet CTC. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122167
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, Engineering Research Center for Water Pollution Source Control and Eco-remediation, Beijing Forestry University, Beijing, 100083, China
Recommended Citation:
Tian Y.,Zou J.,Feng L.,et al. Chlorella vulgaris enhance the photodegradation of chlortetracycline in aqueous solution via extracellular organic matters (EOMs): Role of triplet state EOMs[J]. Water Research,2019-01-01