The influence of solvent and pH on determination of the light absorption properties of water-soluble brown carbon
Mo, Yangzhi1,4; Li, Jun1; Liu, Junwen1; Zhong, Guangcai1; Cheng, Zhineng1; Tian, Chongguo2; Chen, Yingjun3; Zhang, Gan1; Li, Jun(Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China)
2017-07-01
发表期刊ATMOSPHERIC ENVIRONMENT
ISSN1352-2310
卷号161页码:90-98
产权排序第2完成单位
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 (HULLS) should be adjusted to the same value as water-soluble carbon (WSOC) for calculating the light-absorption contribution of HULLS 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. (C) 2017 Elsevier Ltd. All rights reserved.
关键词Brown Carbon Water-soluble Carbon Hulis Ph Light Absorption Properties
DOI10.1016/j.atmosenv.2017.04.037
项目资助者"Strategic Priority Research Program (B)" of the Chinese Academy of Sciences(XDB05040503) ; Natural Science Foundation of China (NSFC)(41430645, 41473101) ; Guangzhou Science and Technology Plan Project(201504010002)
URL查看原文
收录类别SCI
关键词[WOS]AQUATIC HUMIC SUBSTANCES ; OPTICAL-PROPERTIES ; ORGANIC-CARBON ; ATMOSPHERIC PARTICLES ; ANGSTROM EXPONENT ; MOLECULAR-WEIGHT ; SOLAR-RADIATION ; UNITED-STATES ; BLACK CARBON ; AEROSOL
文章类型Article
语种英语
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号WOS:000403515900010
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/23426
专题中科院海岸带环境过程与生态修复重点实验室
通讯作者Li, Jun; Li, Jun(Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China)
作者单位1.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
3.Tongji Univ, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Mo, Yangzhi,Li, Jun,Liu, Junwen,et al. The influence of solvent and pH on determination of the light absorption properties of water-soluble brown carbon[J]. ATMOSPHERIC ENVIRONMENT,2017,161:90-98.
APA Mo, Yangzhi.,Li, Jun.,Liu, Junwen.,Zhong, Guangcai.,Cheng, Zhineng.,...&Li, Jun.(2017).The influence of solvent and pH on determination of the light absorption properties of water-soluble brown carbon.ATMOSPHERIC ENVIRONMENT,161,90-98.
MLA Mo, Yangzhi,et al."The influence of solvent and pH on determination of the light absorption properties of water-soluble brown carbon".ATMOSPHERIC ENVIRONMENT 161(2017):90-98.
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