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Physico-chemical characterization and source tracking of black carbon at a suburban site in Beijing

Physico-chemical characterization and source tracking of black carbon at a suburban site in Beijing

作     者:Hailin Wang Lei Nie Dan Liu Meiping Gao Minyan Wang Zhengping Hao 

作者机构:National Urban Environmental Pollution Control Engineering Techniques Research Center Beijing Municipal Research Institute of Environmental Protection Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nan-jing University of Information Science and Technology Department of Chemical Engineering School of Chemical & Environmental Engineering China University of Mining & Technology Department of Environmental Nano-materials Research Center for Eco-Environmental Sciences Chinese Academy of Sciences 

出 版 物:《Journal of Environmental Sciences》 (环境科学学报(英文版))

年 卷 期:2015年第27卷第7期

页      面:188-194页

核心收录:

学科分类:07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基  金:supported by the Key project for Beijing Municipal Science and Technology Plan (No. D131100003613002) the Open Project from Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control of Nanjing University of Information Science and Technology (KHK1108) the Jiangsu Province Innovation Platform for Superiority Subject of Environmental Science and Engineering 

主  题:Black carbon Characterization Source emission Beijing 

摘      要:Particles from ambient air and combustion sources including vehicle emission, coal combustion and biomass burning were collected and chemically pretreated with the purpose of obtaining isolated BC(black carbon) samples. TEM(transmission electron microscopy)results indicate that BC from combustion sources shows various patterns, and airborne BC appears spherical and about 50 nm in diameter with a homogeneous surface and turbostratic structure. The BET(Barrett-Emmett-Teller) results suggest that the surface areas of these BC particles fall in the range of 3-23 m2/g, with a total pore volume of 0.03-0.05 cm3/g and a mean pore diameter of 7-53 nm. The nitrogen adsorption-desorption isotherms are indicative of the accumulation mode and uniform pore size. O2-TPO(temperature programmed oxidation)profiles suggest that the airborne BC oxidation could be classified as the oxidation of amorphous carbon, which falls in the range of 406-490℃ with peaks at 418, 423 and 475℃,respectively. Generally, the BC characteristics and source analysis suggest that airborne BC most likely comes from diesel vehicle emission at this site.

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