欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
针对北京地区冬季和春季PM2.5污染特征进行研究.于2009年12月~2010年5月在城市点采集24h大气颗粒物样品,进行颗粒物主要化学组分分析.冬季和春季颗粒物的平均质量浓度分别为(84.97±68.98)μg/m3和(65.25±45.76)μg/m3.冬季和春季颗粒物中二次组分(SNA+SOA)有重要贡献,二次组分分别占颗粒物质量浓度的49%和47%.冬春季重污染时期较强的源排放和低温、低风速、高相对湿度等不利的气象特征使得颗粒物中二次无机离子SNA(NH4+、NO3.、SO42.)的比重较干净天明显上升,其中硝酸盐贡献的增强最为显著.同时冬春季有机物中二次有机组分贡献显著.而受一次源的影响,冬春季重污染时期一次有机物的增强.
英文摘要：
A comprehensive measurement was conducted to investigate thecharacteristics of particulate matter (PM)pollution in winter and spring of Beijing. 24-hour particle samples were collected from December to May, 2009~2010,and the chemical compositions of PM2.5 were analyzed. The average PM2.5 massconcentrations were (84.97±68.98)μg/m3and (65.25±45.76) μg/m3 in winter and spring, respectively. Secondary inorganic aerosols, i.e. sulfate, nitrate,andammonium (SNA), and secondary organic aerosols (SOA) were dominant theparticulate matter, with the total fraction(SNA+SOA) of 49% and 47% in winter and spring, respectively. Due to the largesource emissionand unfavorablemeteorological conditions such as low temperature, low wind speed, and high relative humidity; the contributions ofsecondary inorganic aerosols (NH4+、NO3-、SO42-) were enhanced during thepolluted days, and the nitratewas moreenhanced on polluted days. The SOA was always the most importantorganic aerosolcomponentcontributedto PM2.5 inwinter and spring. The contribution ofprimary organicaerosolsalso increased due tothe stagnant meteorological conditionon polluted days.
同期刊论文项目
同项目期刊论文
Kinetic Study of Gas-Phase Reactions of OH and NO3 Radicals and O-3 with iso-Butyl and tert-Butyl Vi
MS2 Virus Inactivation by Atmospheric Pressure Cold Plasma Using Different Gas Carriers and Power Le
Air Pollution and Autonomic and Vascular Dysfunction in Patients With Cardiovascular Disease: Intera
Interactive enhancements of ascorbic acid and iron in hydroxyl radical generation in quinone redox c
Formation of Nitroanthracene and Anthraquinone from the Heterogeneous Reaction Between NO2 and Anthr
Physicochemical characteristics, oxidative capacities and cytotoxicities of sulfate-coated, 1,4-NQ-c
Estimating ammonia emissions from a winter wheat cropland in North China Plain with field experiment
Hydrogen peroxide enhances the oxidation of oxygenated volatile organic compounds on mineral dust pa
Chemical characteristics and sources apportionment of PM2.5 during the harvest season in eastern Chi
Comcentrations and spatial distribution of polycyclic aromatic hydrocarbons(PAHs) and nitrated PAHs(
The improved photoelectrocatalytic degradation of rhodamine B driven by the half-rectified square wa
New particle formation in the presence of strong biomass burning episode at a downwind rural site in
Physicochemical characteristics, oxidative capacities and cytotoxicities of sulfate-, PAH-coated and
Gridded Field Observations of Polybrominated Diphenyl Ethers and Decabronnodiphenyl Ethane in the At
Enhanced formation of fine particulate nitrate at a rural site on the North China Plain in summer: T
Equilibrium atmospheric boundary layer flow: computational fluid dynamics simulation with balanced f
The use of vacuum ultraviolet irradiation to oxidize SO2 and NOx for simultaneous desulfurization an
Comparisons of Ultrafine and Fine Particles in Their Associations with Biomarkers Reflecting Physiol
Gridded field observation of polybrominated diphenyl ethers and decabromodiphenyl ethane in the atmo
Megacities and Large Urban Agglomerations in the Coastal Zone: Interactions Between Atmosphere, Land
Changes of plasma vWF level in response to the improvement of air quality: an observation of 114 hea
Visible-light photoelectrocatalytic degradation of rhodamine B over planar devices using a multi-wal
Investigations on photoelectrocatalytic reduction of Cr(VI) over titanium dioxide anode and metal ca
Impacts of aerosols on the chemistry of atmospheric trace gases: a case study of peroxides and HO2 r
Missing OH source in a suburban environment near Beijing: observed and modelled OH and HO2 concentra
Fast increasing of surface ozone concentrations in Pearl River Delta characterized by a regional air
Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT camp
Comparison of forest burned areas in Mainland China derived from MCD45A1 and data recorded in yearbo
Improving mesoscale modeling using satellite-derived land surface parameters in the Pearl River Delt
Genotoxic effects and serum abnormalities in residents of regions proximal to e-waste disposal facil
Airflow Resistance and Bio-Filtering Performance of Carbon Nanotube Filters and Current Facepiece Re
An online monitoring system for atmospheric nitrous acid (HONO) based on stripping coil and ion chro
Improving mesoscale modeling using satellite-derived land surface parameters in the Pearl River regi
Understanding primary and secondary sources of ambient carbonyl compounds in Beijing using the PMF m
期刊信息
位置：