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北京雾霾研究成果在Atmospheric Chemistry and Physics发表，谁分享下啊
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回复此楼» 抢金币啦！回帖就可以得到:
广西师范大学化学工程与技术专业2026年硕士研究生招生开通第二次调剂，系统12:00关闭
+1/83
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1
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复旦大学 课题组 2026年9月批入学-博士招聘
+1/81
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网爆某大型玻璃厂家
+1/71
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上海交通大学-化学化工学院 博士后招聘
+1/36
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广西科技大学化工专业现仍有较多调剂指标，欢迎符合条件的同学申请调剂
+1/32
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浙江大学杨林课题组招聘有机合成与药物化学有机合成方向博士后
+1/23
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香港中文大学陈也课题组、香港中文大学（深圳）陈仲欣课题组招收联合培养博士后
+1/18
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【香港城市大学】范战西教授课题组现招收1名博士生（全奖, 2027年1月2号入学）
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上海交通大学材料成形（塑性加工）常年招聘硕士研究生、博士研究生和博士后
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佛山大学动物科技学院2026年硕士研究生招生调剂公告（第三批）
+1/7
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稀土发光分析｜核壳结构｜寿命拟合
+1/7
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河南省医学科学院王宁利院士/苗彦彦研究员科研团队、伏羲慧眼云平台团队2026年博士、�
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北化大学材料科学与工程学院研究生调剂
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基金祈福
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稀土发光分析｜核壳结构｜寿命拟合
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中国科学院青海盐湖研究所（界面物理化学、流体力学方向 )科研岗招聘
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材料与化工专业还有大量指标，欢迎大家调剂，调剂系统已经开放
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西安工程大学环境与化学工程学院学硕调剂（专硕可调学硕）
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求英文文献
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9楼2014-01-27 00:32:40
8楼2014-01-25 10:03:42
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小木虫: 金币+0.5, 给个红包，谢谢回帖
小木虫: 金币+0.5, 给个红包，谢谢回帖
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Atmos. Chem. Phys., 13, 7053–7074, 2013 www.atmos-chem-phys.net/13/7053/2013/ Chemical characterization and source apportionment of PM2.5 in Beijing: seasonal perspective R. Zhang1,*, J. Jing1,2,*, J. Tao3,*, S.-C. Hsu4,*, G. Wang5, J. Cao5, C. S. L. Lee6, L. Zhu3, Z. Chen7, Y. Zhao7, and Z. Shen8 Abstract. In this study, 121 daily PM2.5 (aerosol particle with aerodynamic diameter less than 2.5 μm) samples were collected from an urban site in Beijing in four months between April 2009 and January 2010 representing the four seasons. The samples were determined for various compositions, including elements, ions, and organic/elemental carbon. Various approaches, such as chemical mass balance, positive matrix factorization (PMF), trajectory clustering, and potential source contribution function (PSCF), were employed for characterizing aerosol speciation, identifying likely sources, and apportioning contributions from each likely source. Our results have shown distinctive seasonality for various aerosol speciations associated with PM2.5 in Beijing. Soil dust waxes in the spring and wanes in the summer. Regarding the secondary aerosol components, inorganic and organic species may behave in different manners. The former preferentially forms in the hot and humid summer via photochemical reactions, although their precursor gases, such as SO2 and NOx, are emitted much more in winter. The latter seems to favorably form in the cold and dry winter. Synoptic meteorological and climate conditions can overwhelm the emission pattern in the formation of secondary aerosols. The PMF model identified six main sources: soil dust, coal combustion, biomass burning, traffic and waste incineration emission, industrial pollution, and secondary inorganic aerosol. Each of these sources has an annual mean contribution of 16, 14, 13, 3, 28, and 26 %, respectively, to PM2.5. However, the relative contributions of these identified sources significantly vary with changing seasons. The results of trajectory clustering and the PSCF method demonstrated that regional sources could be crucial contributors to PM pollution in Beijing. In conclusion, we have unraveled some complex aspects of the pollution sources and formation processes of PM2.5 in Beijing. To our knowledge, this is the first systematic study that comprehensively explores the chemical characterizations and source apportionments of PM2.5 aerosol speciation in Beijing by applying multiple approaches based on a completely seasonal perspective。 |
10楼2014-01-27 10:16:30
11楼2014-01-27 16:54:36
