Article(id=1242133225695421412, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1242133213372556217, articleNumber=null, orderNo=6, doi=10.3981/j.issn.1000-7857.2015.06.004, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1423411200000, receivedDateStr=2015-02-09, revisedDate=1424620800000, revisedDateStr=2015-02-23, acceptedDate=null, acceptedDateStr=null, onlineDate=1428653855057, onlineDateStr=2015-04-10, pubDate=1427472000000, pubDateStr=2015-03-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1428653855057, onlineIssueDateStr=2015-04-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774077238722, creator=sys-migrate, updateTime=1774077238722, updator=sys-migrate, issue=Issue{id=1242133213372556217, tenantId=1146029695717560320, journalId=1146031591421210625, year='2015', volume='33', issue='6', pageStart='1', pageEnd='128', issueExtLink='null', onlineDate='null', pubDate='1427472000000', pubDateStr='2015-03-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=3, issueType=-1, specialIssue=null, createTime=1774077235785, creator='sys-migrate', updateTime=1774077235785, updator='sys-migrate', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=31, endPage=36, ext={EN=ArticleExt(id=1242133233320669326, articleId=1242133225695421412, tenantId=1146029695717560320, journalId=1146031591421210625, language=EN, title=Characterization of chemical composition for fine particle matter collected in different air quality grades in Xi'an in winter, columnId=1242116903087440448, journalTitle=Science & Technology Review, columnName=Spescial Issues, runingTitle=null, highlight=null, articleAbstract=The ambient fine particle matters (PM_2.5) were collected from November 2008 till March 2009 (wintertime) in an urban site of Xi'an to compare with the chemical compositions according to the air quality grades guidelines (HJ 633-2012). All of PM_2.5 mass concentrations were in excess of the 75 μg/m³ level in the 24 h Ambient Air Quality Standards (GB 3095-2012). The concentrations of PM_2.5 mass and their corresponding chemical compositions were elevated to show a generally increasing trend of the AQI except for a few elements. The concentrations of organic carbon (OC) and water-soluble inorganic ions on six-grade days were approximately 4.5 and 2.7 times those of three-grade days. The enrichment factors of anthropogenic elements (e.g., As, Zn and Pb) on six-grade days were 1.6-2.0 times those of three-grade days, while the elements from crustal sources were not observed along with any surge and rule of air pollution levels. PAHs and n-alkanes mainly were contributed by anthropogenic sources. During the occurrence of heavy air pollution in winter, biomass burning and coal combustion emissions showed a larger contribution to PAHs than gasoline vehicle emissions., authors=XU Hongmei^1,2, CAO Junji^2,3, SHEN Zhenxing¹, LIU Suixin², ZHANG Ting², ZHOU Jiamao², authorsList=XU Hongmei, CAO Junji, SHEN Zhenxing, LIU Suixin, ZHANG Ting, ZHOU Jiamao, authorCompany=1. Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2. Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China;
3. Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=ygXYlS/h82G0nS4cB6D6TA==, pdfFileSize=1400212, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1242133230896358394, articleId=1242133225695421412, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=西安冬季不同空气质量级别对应的PM_2.5化学组分变化特征, columnId=1242116902361830275, journalTitle=科技导报, columnName=专题论文, runingTitle=null, highlight=null, articleAbstract=通过实验采样分析, 研究了西安市冬季不同空气质量级别(HJ 633—2012)下PM_2.5质量浓度及化学组分的变化特征和污染规律。结果表明, 西安市2008—2009 年冬季所有采样天均为轻度污染到严重污染状况, PM_2.5质量浓度100%未达标(GB3095—2012);PM_2.5质量浓度及其化学组分基本随空气质量级别恶化而增加, 除个别元素外, 其他化学组分的质量浓度在严重污染时均出现突增, 有机碳(4.5 倍)和水溶性无机离子(2.7 倍)的增加倍数较大;随大气污染程度的增加, 人为源的重金属富集因子增加剧烈(1.6~2.0 倍), 而主要来自自然源的元素富集因子变化无规律;重污染时期PM_2.5中的多环芳烃(PAHs)、正构烷烃(nalkanes)均主要来自人为源排放贡献, 其中生物质燃烧、低温燃煤排放是PAHs 剧增的主要因素。, authors=徐红梅^1,2, 曹军骥^2,3, 沈振兴¹, 刘随心², 张婷², 周家茂², authorsList=徐红梅, 曹军骥, 沈振兴, 刘随心, 张婷, 周家茂, authorCompany=1. 西安交通大学环境科学与工程系, 西安710049;
2. 中国科学院地球环境研究所气溶胶化学与物理重点实验室, 西安710061;
3. 西安交通大学全球环境变化研究院, 西安710049, correspAuthors=null, authorNote=徐红梅,博士,研究方向为大气PM_2.5化学组成与来源解析,电子信箱xuhongmei@mail.xjtu.edu.cn, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=P8X7b1neU5PX+AO1XKYjPA==, pdfFileSize=1400212, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=国家自然科学基金面上项目(41275168);中央高校基本科研业务费专项(XJJ2015035);西安交通大学新教师科研支持计划项目(XJTUHRT-002))}, authors=null, keywords=[Keyword(id=1242133230372070388, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1242133225695421412, language=CN, orderNo=1, keyword=PM_2.5), Keyword(id=1242133230468539381, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1242133225695421412, language=CN, orderNo=1, keyword=化学组分), 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