和田市城区PM_(2.5)化学组成特征及来源分析
Chemical Characterization and Source Apportionment of PM_(2.5) in Urban Area of Hotan City,China
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文摘
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为了解中国极干旱区域和田市城区大气PM_(2.5)的组成特征及污染水平,于2014年1—12月采集和田市城区大气PM_(2.5)样品,并用气相色谱-质谱联用仪(GC-MS)、离子色谱仪(IC)、电感耦合等离子体质谱仪(ICP-MS)及元素分析仪分析其中PAHs (多环芳烃)、金属元素、水溶性无机离子、OC(有机碳)和EC(元素碳)等化学组分.结果表明,采样期间和田市城区大气PM_(2.5)质量浓度年均值为(770.11±568.01)μg/m~3,呈夏季最高、冬季最低趋势;金属元素、水溶性无机离子、OC、EC、Σ_(16)PAHs(总多环芳烃)分别占PM_(2.5)质量浓度的15.292%、9.789%、4.246%、0.331%、0.015%.利用PMF(正交矩阵因子分解法)分别对PM_(2.5)中PAHs和金属元素、水溶性无机离子、OC、EC进行来源解析表明,PAHs主要来源为煤和汽油燃烧排放(13.91%)、生物质燃烧(33.98%)、天然气燃烧(52.11%) ;金属元素、水溶性无机离子、OC、EC的主要来源为土壤尘(56.49%)、油类燃烧(25.49%)、机动车排放(10.09%)、燃煤及生物质燃烧(7.93%) .研究显示,采样期间沙尘对和田市城区大气PM_(2.5)组成影响较大,是该地区大气污染来源的主要因素. |
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其他语种文摘
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In order to understand the component characteristics and contamination situation of atmospheric PM_(2.5) in the urban area of Hotan,which was the extreme arid area in China,PM_(2.5) samples were collected periodically from January to December in 2014. The seasonal distribution of the mass concentration of polycyclic aromatic hydrocarbons (PAHs),metal elements,water-soluble inorganic ions,organic carbon (OC) and elemental carbon (EC) were analyzed by chromatography-mass spectrometer,ion chromatographer (IC), inductively coupled plasma mass spectrometry,and elemental analyzer,respectively. The results showed that the annual average mass concentration of PM_(2.5) was (770.11±568.01)μg/m~3 during the sampling period,with the highest in summer and the lowest in winter. The total mass of metal elements,water-soluble ions,OC,EC and PAHs accounted for 15.292%,9.789%,4.246%,0.331% and 0.015% of PM_(2.5) ,respectively. Subsequently,a positive matrix factorization (PMF) was exploited to analyze the sources of the components in PM_(2.5) . The PAHs mainly stemmed from coal/gasoline emissions (13.91%),biomass combustion (33.98%) and natural gas combustion (52.11%). PMF also identified that dust (56.49%),oil burning (25.49%),motor vehicle emissions (10.09%),coal burning and biomass combustion (7.93%) were the main sources of the other components of PM_(2.5) . The effect of sandstorm on the composition of PM_(2.5) was remarkable. The sandstorm was considered to be the major factor for the local air pollution. |
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来源
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环境科学研究
,2018,31(5):823-833 【核心库】
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DOI
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10.13198/j.issn.1001-6929.2017.04.23
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关键词
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和田市城区
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PM_(2.5)
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化学组成
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正交矩阵因子分解法
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地址
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1.
新疆大学, 煤炭清洁转化与化工过程新疆自治区重点实验室, 新疆, 乌鲁木齐, 830046
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中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-6929 |
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学科
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环境污染及其防治 |
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基金
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国家自然科学基金项目
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中国沙漠气象科学研究基金
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文献收藏号
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CSCD:6245189
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