DOI: 10.1016/j.watres.2019.02.021
Scopus记录号: 2-s2.0-85062226806
论文题名: Effects of chlorination and combined UV/Cl 2 treatment on endotoxin activity and inhalation toxicity of lipopolysaccharide, gram-negative bacteria and reclaimed water
作者: Xue J. ; Zhang J. ; Qiao J. ; Lu Y.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 155 起始页码: 124
结束页码: 130
语种: 英语
英文关键词: Chlorination
; Endotoxin
; Inflammation
; Reclaimed water
; UV
英文摘要: Disinfection processes were applied in reclaimed water plant to eliminate pathogens and control the related health risk during water reuse. However, extra problems might emerge such as the released free endotoxins from the ruptured cell wall of gram-negative bacteria. Endotoxins can induce lung inflammatory responses after inhalation, which has been neglected in the water quality regulation, and the removal of endotoxin was not under consideration in the process of reclamation. In the present study, two well-known disinfection processes, chlorination and combined UV/chlorine (UV/Cl 2 ), were performed to test the removal efficiency of endotoxin activity, as well as the inflammation inducing ability. In the pure LPS solution, UV/Cl 2 treatment significantly reduced both endotoxin activity and lung inflammation responses with better oxidizability of the generated hydroxyl radical. However, its performance on bacteria liquid and real secondary effluent was more complicated. The cell wall-bound LPS have lower endotoxin activities and inflammation inducing ability. Immediately after the cell wall was destroyed, the bound LPS were released to the solution to be free LPS, which dramatically increased both the endotoxin activity and inflammation inducing ability of the water. When these free endotoxins were continuously oxidized, the endotoxin activity and inflammatory response decreased again but not to the background level. Therefore, the inflammation inducing ability of reclaimed water could not be removed efficiently. These results suggest that in spite of its high oxidability, UV/Cl 2 treatment is not capable of removing the endotoxin-based toxicity, and other technologies are necessary to control endotoxin levels in reclaimed water. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121918
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; Department of Chemistry, Tsinghua University, Beijing, 100084, China; Chengdu Environmental Investment Group Co., LTD, China
Recommended Citation:
Xue J.,Zhang J.,Qiao J.,et al. Effects of chlorination and combined UV/Cl 2 treatment on endotoxin activity and inhalation toxicity of lipopolysaccharide, gram-negative bacteria and reclaimed water[J]. Water Research,2019-01-01,155