Heterogeneous reactions of particulate benzo[b]fluoranthene and benzo[k]fluoranthene with NO3 radicals

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气环境科学实验室

	Heterogeneous reactions of particulate benzo[b]fluoranthene and benzo[k]fluoranthene with NO3 radicals
	Zhang, Peng ; Wang, Youfeng ; Yang, Bo ; Liu, Changgeng ; Shu, Jinian
刊名	CHEMOSPHERE
	2014
卷号	99 期号:1 页码:34-40
关键词	Polycyclic aromatic hydrocarbons Heterogeneous reactions NO3 radicals Aerosol mass spectrometry
ISSN号	0045-6535
中文摘要	Benzo[b]fluoranthene (B[b]F) and benzo[k]fluoranthene (B[k]F) are widespread priority pollutants of polycyclic aromatic hydrocarbons (PAHs), which can react with atmospheric oxidants during transport in the troposphere and lead to the formation of more toxic compounds. At present, the rates of heterogeneous reactions of B[b]F and B[k]F aerosols with NO3 radicals, an important atmospheric oxidant, are not fully understood. Thus, this study investigated the products and kinetics of heterogeneous reactions of suspended B[b]F and B[k]F particles with NO3 radicals in an aerosol reaction chamber at room temperature (293 +/- 2 K) under atmospheric pressure. The reactions are monitored online using a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer (VUV-ATOFMS) and an atmospheric gas analysis mass spectrometer. The mono-nitro-, di-nitro-, tri-nitro-products, and those products containing both nitro and ketone groups are observed with VUV-ATOFMS. The effective rate constants for heterogeneous reactions of particulate B[b]F and B[k]F with NO3 radicals under the experimental conditions are respectively estimated to (1.2 +/- 0.1) x 10(-12) cm(3) molecule(-1) s(-1) (5.8 +/- 0.3) x 10(-13) cm(3) molecule(-1) s(-1) using a mixed-phase relative rate method, and the corresponding effective uptake coefficients are respectively estimated to 0.22 and 0.65. The lifetimes of particulate B[b]F and B[k]F at a typical concentration of NO3 radicals (5 x 10(8) molecule cm(-3)) in the lower troposphere during the night are estimated to 3.0 and 3.9 h, respectively. The experimental results of these heterogeneous reactions in the aerosol state provide supplementary knowledge for kinetic behaviors of airborne PAHs particles. (C) 2013 Elsevier Ltd. All rights reserved.
WOS记录号	WOS:000332141300003
公开日期	2015-03-23
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9259]
专题	生态环境研究中心_大气环境科学实验室
推荐引用方式 GB/T 7714	Zhang, Peng,Wang, Youfeng,Yang, Bo,et al. Heterogeneous reactions of particulate benzo[b]fluoranthene and benzo[k]fluoranthene with NO3 radicals[J]. CHEMOSPHERE,2014,99(1):34-40.
APA	Zhang, Peng,Wang, Youfeng,Yang, Bo,Liu, Changgeng,&Shu, Jinian.(2014).Heterogeneous reactions of particulate benzo[b]fluoranthene and benzo[k]fluoranthene with NO3 radicals.CHEMOSPHERE,99(1),34-40.
MLA	Zhang, Peng,et al."Heterogeneous reactions of particulate benzo[b]fluoranthene and benzo[k]fluoranthene with NO3 radicals".CHEMOSPHERE 99.1(2014):34-40.