|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | PM_(2.5) and PM_(10-2.5) chemical composition and source apportionment near a Hong Kong roadway显示文摘Twenty-four-hour PM_(2.5) and PM_(10) samples were collected simultaneously at a highly trafficked roadside site in Hong Kong every sixth day from October 2004 to September 2005.The mass concentrations of PM_(2.5),PM_(10-2.5)(defined as PM_(10)- PM_(2.5)),organic carbon(OC),elemental carbon(EC),water-soluble ions,and up to 25 elements were determined.Investigation of the chemical compositions and potential sources revealed distinct differences between PM_(2.5) and PM_(10-2.5).The annual average mass concentrations were 55.5±25.5 and 25.9±15.7 ug/m^3 for PM_(2.5) and PM_(10-2.5),respectively.EC,OM(OM =OC×1.4),and ammonium sulfate comprised over ~82% of PM_(2.5),accounting for^29%,~27%,and ~25%,respectively,of the PM_(2.5) mass.Low OC/EC ratios(less than 1) for PM_(2.5) suggested that fresh diesel-engine exhaust was a major contributor.Seven sources were resolved for PM_(2.5) by positive matrix factorization(PMF) model,including vehicle emissions(~29%),secondary inorganic aerosols(~27%),waste incinerator/biomass burning(~23%),residual oil combustion(~10%),marine aerosols(~6%),industrial exhaust(~4%),and resuspended road dust(~1%).EC and OM comprised only ~19%of PM_(10-2.5).The average OC/EC ratio of PM_(10-2.5) was 7.8±14.2,suggesting that sources other than vehicular exhaust were important contributors.The sources for PM_(10-2.5) determined by the PMF model included ~20%traffic-generated resuspension(e.g.,tire dust/brake linear/petrol evaporation),~17% locally resuspended road dust,~17% marine aerosols,~12% secondary aerosols/field burning,and ~11%vehicle emissions. | Yan Cheng Shuncheng Lee Zhaolin Gu Kinfai Ho Yunwei Zhang Yu Huang Judith C.Chow John G.Watson Junji Cao Renjian Zhang | 2015 | Particuology2015，13，1： | 14 |
| 2 | 西汉张安世墓葬M1墓室内的大气环境调查显示文摘了解待发掘封闭墓葬内的大气环境,可为考古发掘和文物保存环境研究提供科学依据。西汉张安世墓园中的M1墓葬是一座未被盗扰的墓室,本研究在墓室开启前,有针对性地监测了墓室内的微气候参数和大气污染物。结果显示,相对于外界大气,密闭的墓室内低温、高湿、缺氧,且酸性气态污染物浓度较低。因此,在考古发掘及后续保存文物时,应针对不同文物材料采取密闭容器、保湿、避光等措施,避免由于环境骤变导致文物的风化损坏。本研究建立的待发掘墓葬大气环境测试体系及基础数据,可为相关考古和文保工作提供有益的借鉴。 | 曹军骥 杨军昌 胡塔峰 Lee Shuncheng 王新明 Ho Kinfai 董俊刚 丁岩 | 2013 | 文物保护与考古科学2013，25，2： | 4 |
| 3 | Impact of PM 2.5 chemical compositions on aerosol light scattering in Guangzhou — the largest megacity in South China显示文摘 | Jun Tao Leiming Zhang Kinfai Ho Renjian Zhang Zejian Lin Zhisheng Zhang Mang Lin Junji Cao Suixing Liu Gehui Wang | 2014 | Atmospheric Research2014，，： | 1 |
| 4 | Real-time characterization of particle-bound polycyclic aromatic hydrocarbons at a heavily trafficked roadside site 显示文摘 | CHENG Yan HO Kinfai WU Wenjing | 2012 | Aerosol and Air Quality Research2012，12，6： | 1 |
| 5 | Chemical characterization of aerosol collected at Mt. Yulong in wintertime on the southeastern Tibetan Plateau显示文摘 | Ningning Zhang Junji Cao Kinfai Ho Yuanqing He | 2011 | Atmospheric Research2011，，： | 1 |
| 6 | Light attenuation cross-section of black carbon in an urban atmosphere in northern China显示文摘Fine particulate matter(PM_(2.5)) samples were collected over two years in Xi'an,China to investigate the relationships between the aerosol composition and the light absorption efficiency of black carbon(BC).Real-time light attenuation of BC at 880 nm was measured with an aethalometer.The mass concentrations and elemental carbon(EC) contents of PM_(2.5) were obtained,and light attenuation cross-sections(σ_(ATN))of PM_(2.5) BC were derived.The mass of EC contributed ~5% to PM2.5 on average.BC σ_(ATN) exhibited pronounced seasonal variability with values averaging 18.6,24.2,16.4,and 26.0 m^2/g for the spring,summer,autumn,and winter,respectively,while averaging 23.0 m^2/g overall.σ_(ATN) varied inversely with the ratios of EC/PM_(2.5),EC/[SC_4^(2-)],and EC/[NO_3^-].This study of the variability in σ_(ATN) illustrates the complexity of the interactions among the aerosol constituents in northern China and documents certain effects of the high EC,dust,sulfate and nitrate loadings on light attenuation. | Junji Cao Chongshu Zhu Kinfai Ho Yongming Han Zhenxing Shen Changlin Zhan Jiaquan Zhang | 2015 | Particuology2015，13，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员