Impact of sulfate and nitrate on black carbon aerosols at Nanjing in winter and summer
YANG Yi-fan1, TANG Li-li2,3, XU Xiao-feng1, JIANG Lei2, LIU Dan-tong4, ZHANG Yun-jiang5,6, HUA Yan2, DU Song-shan3, WANG Zhuang2, ZHOU Hong-cang2
1. School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET), School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;
3. Jiangsu Environmental Monitoring Center, Nanjing 210036, China;
4. Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester M139 PL, UK;
5. Institut National de l'Environnement Industriel et des Risques, Verneuil-en-Halatte 60550, France;
6. Laboratoire des Sciences du Climat et l'Environment, CNRS-CEA-UVSQ, Gif sur Yvette 91191, France
The impact of nitrate and sulfate aerosols on the mixing state of black carbon (BC) particles was investigated by using on-line measurements of a single particles soot photometer (SP2) and a MARGA in urban Nanjing in winter and summer. Results showed that the mass concentration of BC was in the range of 1.01~14.5μg/m3 (0.20~3.81μg/m3), with an average value of (4.39±2.66)μg/m3[(1.67±0.76)μg/m3] inwinter (summer), respectively. The diurnal variations of BC particles presented two peaks relative to rush hours in morning and evening. The mixing state of BC-containing particles were evaluated as a ratio of Dp/Dc, the average ratio of which was 1.81±0.21 (1.24±0.08) and ranged from 1.39 to 2.34 (from 1.03 to 1.45) in winter (summer), respectively. Dp/Dcshowed an opposite diurnal trend as comparing with BC, where made more obvious variations for winter. Dp/Dccorrelated well with sulfate and nitrate, and showed higher correlation with nitrate (sulfate) in winter (summer), respectively. Local emissions were the major source contributing to BC, the mixing state of which was more significant influence of nitrate and sulfate during clean periods in winter. The correlation between Dp/Dcwith sulfate and nitrate in winter was lower during heavy pollution periods, resulting from the effects of both local emissions and regional transports on ambient BC particles.
杨一帆, 汤莉莉, 许潇锋, 蒋磊, 刘丹彤, 张运江, 花艳, 杜嵩山, 王壮, 周宏仓. 南京冬夏硫酸盐和硝酸盐对黑碳混合态的影响[J]. 中国环境科学, 2018, 38(4): 1221-1230.
YANG Yi-fan, TANG Li-li, XU Xiao-feng, JIANG Lei, LIU Dan-tong, ZHANG Yun-jiang, HUA Yan, DU Song-shan, WANG Zhuang, ZHOU Hong-cang. Impact of sulfate and nitrate on black carbon aerosols at Nanjing in winter and summer. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1221-1230.
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