DOI: 10.1016/j.watres.2018.10.031
Scopus记录号: 2-s2.0-85056844375
论文题名: Free nitrous acid (FNA) induced transformation of sulfamethoxazole in the enriched nitrifying culture
作者: Sun F. ; Wu D. ; Chua F.D. ; Zhu W. ; Zhou Y.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 432
结束页码: 439
语种: 英语
英文关键词: AOB
; Free nitrous acid
; Nitrification
; Sulfamethoxazole
; Transformation product
Scopus关键词: Ammonia
; Antibiotics
; Bacteria
; Inorganic acids
; Mathematical transformations
; Nitrification
; Sulfur compounds
; Ammonia oxidizing bacteria
; Free nitrous acid (FNA)
; Free nitrous acids
; Sulfamethoxazole
; Sulfamethoxazole (SMX)
; Sulfonamide antibiotics
; Transformation behavior
; Transformation products
; Linear transformations
; ammonia
; nitrite
; nitrous acid
; sulfamethoxazole
; ammonia
; antibiotics
; degradation
; metabolism
; nitrification
; nitrifying bacterium
; nitrite
; nitrous acid
; oxidation
; transformation
; wastewater
; ammonia oxidizing bacterium
; Article
; bacterial metabolism
; bacterium culture
; biotransformation
; concentration (parameters)
; degradation
; nitrification
; nitrifying bacterium
; priority journal
; waste water management
; Nitrosomonadales
英文摘要: The sulfonamide antibiotics sulfamethoxazole (SMX) has been frequently detected in the wastewater. It has been reported that part of SMX can be transformed by the co-metabolism of ammonia oxidizing bacteria (AOB) during nitrifying process. However, previous studies reported inconsistent or even contradictory results in terms of SMX degradation and/or transformation. Literature study revealed that nitrite may play certain role in SMX transformation, which has been neglected previously. In this study, the transformation behavior of SMX was investigated with and without the presence of nitrite in an enriched nitrifying culture. The results clearly show that the elimination of SMX occurred with the presence/accumulation of nitrite, and a linear regression was observed between SMX elimination efficiency and free nitrous acid (FNA) concentration, indicating that FNA was the major factor responsible for the SMX transformation. By reacting with FNA, SMX transformation products, such as 4-nitro-SMX, desamino-SMX and hydroxylated SMX, were detected. However, when FNA concentration decreased, these intermediates may be retransformed back to SMX. These findings improved our understanding on SMX transformation in a biological system and highlighted the role of nitrite/FNA in the sulfonamide antibiotics degradation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122140
Appears in Collections: 气候变化事实与影响
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作者单位: School of Civil and Environmental Engineering, Nanyang Technological University639798, Singapore; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University637141, Singapore
Recommended Citation:
Sun F.,Wu D.,Chua F.D.,et al. Free nitrous acid (FNA) induced transformation of sulfamethoxazole in the enriched nitrifying culture[J]. Water Research,2019-01-01