干旱区生态环境知识资源中心(Arid): 乌鲁木齐市采暖期大气PM

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	乌鲁木齐市采暖期大气PM_(2.5)特征分析
其他题名	Characteristics of PM_(2.5) during the Period of Heating in Urumqi
	梁琼; 尹辉; 牟书勇; 张道勇; 潘响亮
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2015
卷号	32 期号:3 页码:543-550
中文摘要	利用扫描电镜-X 射线能谱仪(SEM-EDX)、离子色谱、电感耦合等离子发射光谱和全自动化学分析仪器对乌鲁木齐市采暖期大气细颗粒物(PM_(2.5))的形态结构及水溶性无机离子特征进行分析。结果表明:①乌鲁木齐市不同功能区大气PM_(2.5)类型多样,主要类型有硅铝酸盐、硅铝飞灰、铁氧化物颗粒、硫酸/碳酸盐晶体、钛聚集颗粒物、碳质气溶胶(烟尘集合体、焦油球、不规则碳质颗粒)、富氟颗粒和不明物质等,其中硅铝酸盐、硅铝飞灰、烟尘集合体在各个功能区都观测到,富氟颗粒仅存在于头屯河区、天山区和水磨沟区; ②SO_4~(2-)、NH_4~+、NO_3~-、Cl~-为乌鲁木齐市水溶性无机离子的主要组成部分,占全部无机离子的90.3%; ③乌鲁木齐市大气PM_(2.5)的pH在3.72~5.76之间,平均值为5.11,其大气气溶胶整体偏酸性,其中〔NO_3~-〕与〔SO_4~(2-)〕的比值小于1,可认为固定源排放是乌鲁木齐市大气PM_(2.5)中水溶性无机离子的主要来源。
英文摘要	PM_(2.5) aerosol samples of Urumqi,a typical city in arid area of Northwest China,were collected during the heating period of Nov. 2013 to Feb. 2014.Microscopic morphology and elemental composition of PM_(2.5) were measured using a Field Emission Scanning Electron Microscope with Energy-Dispersive Spectrometer (SEM-EDX) ,water-soluble ions of PM_(2.5) were analyzed by using Ion Chromatography and Automated Discrete Analyzers simultaneously. The results indicated that the particles of PM_(2.5) can be classified as following groups: aluminosilicate/silica minerals,fly ash with rich Si-Al,Fe-oxide particles,sulfate/carbonate crystals,Ti-abundant particle,carbonaceous aerosols (including soot,tar ball and irregularly shaped carbon) ,F-rich particles and some particles which we did not know. Among them,aluminosilicate/silica minerals,Si-Al-rich fly ashes and soot were observed in all functional areas of this study. F-rich particles were only observed in Toutunhe district,Tianshan district,Shuimogou district. Water-soluble components including SO_4~(2-) ,NH_4~+ ,NO_3~- ,and Cl~- were dominant in PM_(2.5) of Urumqi,accounting for 90.3% of total inorganic elements. The pH value of PM_(2.5) in Urumqi was 5.11 in average,varying from 3.72 to 5.76,that means the whole aerosol in Urumqi is partially acid and the mass ratio of (NO_3~-)/(SO_4~(2-)) is less than 1.The emission of fixed sources was considered to be the major source of water-soluble inorganic ions of PM_(2.5) in Urumqi.
中文关键词	形态结构 ; 水溶性无机离子 ; 乌鲁木齐
英文关键词	PM_(2.5) PM_(2.5) microscopic morphology water-soluble inorganic ions Urumqi
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5433761
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232718
作者单位	中国科学院新疆生态与地理研究所环境污染与生态修复实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	梁琼,尹辉,牟书勇,等. 乌鲁木齐市采暖期大气PM_(2.5)特征分析[J]. 中国科学院新疆生态与地理研究所,2015,32(3):543-550.
APA	梁琼,尹辉,牟书勇,张道勇,&潘响亮.(2015).乌鲁木齐市采暖期大气PM_(2.5)特征分析.干旱区研究,32(3),543-550.
MLA	梁琼,et al."乌鲁木齐市采暖期大气PM_(2.5)特征分析".干旱区研究 32.3(2015):543-550.