检索结果-南通市图书馆

Characteristics and Seasonal Variations of pm2.5, pm10, and TSP Aerosol in Beijing

Biomedical and Environmental Sciences 2006年第6期19卷 461-468页

作者： WEN-JIE ZHANG YE-LE SUN GUO-SHUN ZHUANG DONG-QUN XU Center for Atmospheric Environmental Study Department of Chemistry Beijing Normal University Beijing 100875 China Institute for Environmental Health and Related Products Safety China CDC Beijing 100021 China Center for Atmospheric Chemistry Study Department of Environmental Science ＆ Engineering Fudan University Shanghai 200433 China The Institute of Atmospheric Physics CAS LAPC Beijing 100029 China

Objective To investigate the seasonal characteristics and the sources of elements and ions with different sizes in the aerosols in Beijing. Methods Samples of particulate matters （pm2,5）, pm10, and total suspended particle （TSP） aerosols were collected simultaneously in Beijing from July 2001 to April 2003. The aerosol was chemically characterized by measuring 23 elements and 18 water-soluble ions by inductively coupled plasma-atomic emission spectroscopy （ICP-AES） and ion chromatography （IC）, respectively. Results The samples were divided into four categories： spring non-dust, spring dust, summer dust, and winter dust. TSP, pm10, and pm2.5 were most abundant in the spring dust, and the least in summer dust. The average mass ratios of pm〉10, pm2,5-10, and pm2.5 to TSP confirmed that in the spring dust both the large coarse （pm〉10） and fine particles （pm2.5） contributed significantly in summer pm2.5, pm2,5-10, and pm〉10 contributed similar fractions to TSP, and in winter much pm2.5. The seasonal variation characteristics of the elements and ions were used to divide them into four groups： crustal, pollutant, mixed, and secondary. The highest levels of crustal elements, such as AI, Fe, and Ca, were found in the dust season, the highest levels of pollutant elements and ions, such as As, F, and Cl^-, were observed in winter, and the highest levels of secondary ions （SO4^2-, NO3^-, and NH4^＋） were seen both in summer and in winter. The mixed group （Eu, Ni, and Cu） showed the characteristics of both crustal and pollutant elements. The mineral aerosol from outside Beijiug contributed more than that from the local part in all the reasons but summer, estimated using a newly developed element tracer technique.

关键词： pm2,5 pm10 TSP Seasonal variation Sources

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preliminary Analysis of Influencing Factors of Low Visibility on a Hazy Day in Winter in Binzhou City

引用

Meteorological and Environmental Research 2018年第2期9卷 16-19页

作者： Zou Meiling Zhang Chenxi Li Xueping Department of Resources and Environment Binzhou University

Based on the monitoring data of visibility,particulate matter（ pm2. 5 and pm10） and atmospheric pollutants（ SO2,NO2,CO,and O3）,and meteorological factors（ temperature,humidity,and wind speed） at the six automatic air monitoring stations in Binzhou City from December 2016 to February 2017,the correlations between visibility and influencing factors were analyzed to study the main influencing factors of atmospheric visibility. The results showed that the daily average concentration of particulate matter negatively correlated with atmospheric visibility,and the correlation between pm2. 5 concentration and atmospheric visibility was more obvious than that of pm10 concentration. Among atmospheric pollutants,the daily average concentration of CO,NO2 and SO2 also negatively correlated with atmospheric visibility,while there was a positive correlation between visibility and the daily average concentration of O3. Daily average temperature and wind speed positively correlated with visibility,while relative humidity negatively correlated with visibility. Wind speed,relative humidity and pm2. 5 had strong correlation with visibility,and the linear correlation coefficient R2 was 0. 501 6,0. 446 6,and 0. 205 8 respectively,so wind speed,relative humidity,and pm2. 5 were the main factors influencing the decrease of atmospheric visibility on a hazy day in winter.

关键词： Visibility pm2,5 Atmospheric pollutants Correlation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：