DOI: 10.1016/j.atmosenv.2017.04.037
Scopus记录号: 2-s2.0-85018783419
论文题名: The influence of solvent and pH on determination of the light absorption properties of water-soluble brown carbon
作者: Mo Y ; , Li J ; , Liu J ; , Zhong G ; , Cheng Z ; , Tian C ; , Chen Y ; , Zhang G
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 161 起始页码: 90
结束页码: 98
语种: 英语
英文关键词: Brown carbon
; HULIS
; Light absorption properties
; pH
; Water-soluble carbon
Scopus关键词: Electromagnetic wave absorption
; Extraction
; Light absorption
; Methanol
; pH
; pH effects
; Radiation effects
; Solvents
; Absorption property
; Brown carbons
; Concentration effects
; HULIS
; Humic-like substances
; Optical characteristics
; Ultraviolet wavelength
; Water-soluble carbons
; Water absorption
; brown carbon
; carbon
; solvent
; unclassified drug
; absorption spectrum
; biomass burning
; brown carbon
; concentration (composition)
; diesel
; extraction method
; humic substance
; methanol
; pH
; solar radiation
; solvent
; ultraviolet radiation
; absorption
; aerosol
; Article
; biomass
; drug concentration
; exhaust gas
; extraction
; humic substance
; light absorption
; particulate matter
; pH
; priority journal
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Brown carbon (BrC) is a class of unidentified organic compounds that efficiently absorb solar radiation in the ultraviolet (UV) wavelengths, and its effects on climate are poorly understood. Measurement of the light absorption properties of BrC in liquid extracts is a commonly used BrC analytical method, but the optical characteristics of water-soluble BrC may be affected by pH and solvent. In this work, we investigated the effects of concentration, pH, and solvent on water-soluble BrC from ambient aerosols, biomass burning, diesel exhaust, and a humic substance standard. The results showed that pH can affect the light absorption properties of water-soluble BrC, whereas concentration had little effect, except low concentrations dissolved in methanol. Therefore, the pH of humic-like substances (HULIS) should be adjusted to the same value as water-soluble carbon (WSOC) for calculating the light-absorption contribution of HULIS to WSOC. The light absorptivity of water-soluble BrC dissolved in methanol was higher than that in water. Considering the pH and concentration effects, extraction of WSOC with a particle: water ratio of 0.25 mg/mL is proposed as well as to get a reference pH for light absorption analysis. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82332
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Science, Yantai, China; College of Environmental Science and Engineering, Tongji University, Shanghai, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Mo Y,, Li J,, Liu J,et al. The influence of solvent and pH on determination of the light absorption properties of water-soluble brown carbon[J]. Atmospheric Environment,2017-01-01,161