Comparisons of measured nitrous acid (HONO) concentrations in a pollution period at urban and suburban Beijing, in autumn of 2014
Comparisons of measured nitrous acid (HONO) concentrations in a pollution period at urban and suburban Beijing, in autumn of 2014
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2014年秋季北京城区与郊区某污染期亚硝酸（HONO）浓度实测对比
DOI：
10.1007/s11426-015-5454-2
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发表时间：
2015-07
期刊：
影响因子：
--
通讯作者：
Ge Maofa
中科院分区：
文献类型：
--
作者：
Tong Shengrui;Hou Siqi;Zhang Ying;Chu Biwu;Liu Yongchun;He Hong;Zhao Pusheng;Ge Maofa
为研究大气中HONO的形成机制，对北京市城区和郊区大气进行了连续观测。在此期间，城市和郊区的PM2.5浓度分别增加到201和137 μg/m3。城市和郊区HONO、CO、SO2、O3、NO、NO2、NOx的浓度分别为1.45、0.61、8.7、4.3、44.4、37.4、79.4 ppbv和0.72、1.00、1.2、7.9、3.7、8.2、11.9 ppbv。为了比较HONO形成的可能途径，在这两个网站，直接排放，异质地层，同质产品的贡献进行了研究。HONO/NO2比值表明，郊区的NO2非均相反应更有效。无论是城市还是郊区，PM2.5浓度和相对湿度的增加都会促进相对湿度转换效率的提高，其范围为0%~ 85%。当RH> 85%时，HONO形成速度减慢。此外，对直接排放和均相反应的研究表明，它们对城市地区HONO增加的贡献最大，而郊区的贡献为20%。这意味着在城市或污染期，NOx和NO浓度较高，HONO形成以直接排放和均相反应为主。
To study the HONO formation mechanisms during a pollution period, a continuous measurement was performed in both urban and suburban aeras of Beijing. During this period, the PM2.5concentrations increased to 201 and 137 μg/m3in urban and suburban areas, respectively. The concentrations of HONO, CO, SO2, O3, NO, NO2, NOxwere 1.45 ppbv, 0.61 ppmv, 8.7 ppbv, 4.3 ppbv, 44.4 ppbv, 37.4 ppbv, 79.4 ppbv and 0.72 ppbv, 1.00 ppmv, 1.2 ppbv, 7.9 ppbv, 3.7 ppbv, 8.2 ppbv, 11.9 ppbv, in urban and suburban areas, respectively. To compare possible pathways of HONO formation in both sites, the contributions of direct emissions, heterogeneous formations, and homogeneous productions were studied. HONO/NO2ratios in the two sites indicated that heterogeneous reactions of NO2were more efficient in suburban areas. And in both urban and suburban areas, the increase of PM2.5concentrations andRHwould promote the conversion efficiency inRHthat ranged from 0% to 85%. However, whenRHwas above 85%, the HONO formation slowed down. Moreover, the study of direct emissions and homogeneous reactions showed that they contributed to a majority of HONO increase in urban areas than the 20% contributions in suburban areas. It implied that the high NOxconcentrations and NO concentrations in urban areas or in pollution periods would make direct emissions and homogeneous reactions become dominant in HONO formations.
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PRIDE-PRD2004中国期间非城市地点夜间亚硝酸（HONO）形成的观测
影响因子：
5
作者：
Peng Cheng;Yafang Cheng;Yuanhang Zhang;Hang Su;Jacob Slanina;Xuesong Wang;Shuofei Dong;Min Shao;Limin Zeng;Alfred Wiedensohler
通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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DOI：
10.1016/j.scitotenv.2012.12.065
发表时间：
2013-03
期刊：
The Science of the total environment
影响因子：
--
作者：
F. Spataro;A. Ianniello;G. Esposito;I. Allegrini;T. Zhu;Min Hu
通讯作者：
F. Spataro;A. Ianniello;G. Esposito;I. Allegrini;T. Zhu;Min Hu
影响因子：
6.9
作者：
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通讯作者：
M. Qin;P. Xie;Wenqing Liu;Ang Li;K. Dou;W. Fang;Jian-guo Liu;Wei-Jun Zhang