DOI: 10.1016/j.watres.2018.08.008
Scopus记录号: 2-s2.0-85053027233
论文题名: Influence of ultrasound on the properties of dissolved organic matter with regards to proton and metal ion binding moieties
作者: Liu H. ; Chen G. ; Liu L. ; Yan M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 279
结束页码: 286
语种: 英语
英文关键词: Complexation
; Differential absorbance spectroscopy
; Dissolved organic matter
; Phenolic groups
; Protonation-deprotonation
; Ultrasound
Scopus关键词: Aluminum compounds
; Binding sites
; Biogeochemistry
; Biological materials
; Calcium compounds
; Complexation
; Dissolution
; Metal ions
; Metals
; Organic compounds
; Wastewater treatment
; Water treatment
; Differential absorbance spectroscopy
; Dissolved organic matters
; Information concerning
; Non-ideal competitive adsorptions
; Phenolic groups
; Spectrophotometric titrations
; Ultrasound intensity
; Water and wastewater treatments
; Ultrasonics
; adsorption
; atomic absorption spectroscopy
; carboxylic acid
; complexation
; concentration (composition)
; dissolved organic matter
; metal binding
; optimization
; organic matter
; phenolic compound
; ultrasonics
; wastewater treatment
; wavelength
英文摘要: Ultrasound is widely used in water and wastewater treatment. However, the influence of ultrasound on the composition and structure of dissolved organic matter (DOM) and consequently its behaviors is still unclear. In this study, the changes in proton and metal binding moieties in DOM caused by ultrasound at an environmentally relevant concentration (about 5 mg·L−1) were investigated using spectrophotometric titrations. The amounts of carboxylic and phenolic-like groups in DOM before and after ultrasound were quantified by the spectral parameter, Dslope350-400 (the differential slope of the Log-transformed DOM absorbance in the wavelength region of 350–400 nm) in combination with the non-ideal competitive adsorption (NICA) model. The results demonstrate that the concentration of carboxylic-like sites decreased with an increase in the ultrasound intensity at the same reaction time. However, the concentration of phenolic-like sites increased with an increase in the ultrasound intensity in most cases. The amounts of bound metal Ca(II) and Al(III) ions decreased with an increase of the ultrasound intensity due to the reduction of available total binding sites (carboxylic-like and phenolic-like groups) in the DOM after ultrasound. This study provides detailed in-situ information concerning the changes in the properties and behaviors of DOM in ultrasound, which would be useful to understand in more detail and to optimize the utility of ultrasound in water and wastewater treatment. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112461
Appears in Collections: 气候减缓与适应
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作者单位: School of Environment and Resources Sciences, Shanxi University, The Laboratory of Environmental Engineering, Shanxi, 030006, China; Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, China
Recommended Citation:
Liu H.,Chen G.,Liu L.,et al. Influence of ultrasound on the properties of dissolved organic matter with regards to proton and metal ion binding moieties[J]. Water Research,2018-01-01,145