OH-Initiated Oxidation of m-Xylene on Black Carbon Aging

doi:10.1021/acs.est.6b01272

CORC > 北京大学 > 环境科学与工程学院

	OH-Initiated Oxidation of m-Xylene on Black Carbon Aging
	Guo, Song ; Hu, Min ; Lin, Yun ; Gomez-Hernandez, Mario ; Zamora, Misti L. ; Peng, Jianfei ; Collins, Donald R. ; Zhang, Renyi
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2016
关键词	SECONDARY ORGANIC AEROSOL ENHANCED LIGHT-ABSORPTION SULFURIC-ACID MIXING STATE SOOT AEROSOL HETEROGENEOUS CHEMISTRY MOBILITY RELATIONSHIP OPTICAL-PROPERTIES SHOCK-TUBE PARTICLES
DOI	10.1021/acs.est.6b01272
英文摘要	Laboratory experiments are conducted to investigate aging of size-classified black carbon (BC) particles from OH-initiated oxidation of m-xylene. The variations in the particle size, mass, effective density, morphology, optical properties, hygroscopicity, and activation as cloud condensation nuclei (CCN) are simultaneously measured by a suite of aerosol instruments, when BC particles are exposed to the oxidation products of the OH-m-xylene reactions. The BC aging is governed by the coating thickness (Delta r(ve)), which is correlated to the reaction time and initial concentrations of m-xylene and NOx. For an initial diameter of 100 nm and Delta r(ve) = 44 nm, the particle size and mass increase by a factor of 1.5 and 10.4, respectively, and the effective density increases from 0.43 to 1.45 g cm(-3) due to organic coating and collapsing of the BC core. The BC particles are fully converted from a highly fractal to nearly spherical morphology for Delta r(ve) = 30 nm. The scattering, absorption, and single scattering albedo of BC particles are enhanced accordingly with organic coating. The critical supersaturation for CCN activation is reduced to 0.1% with Delta r(ve) = 44 nm. The results imply that the oxidation of m-xylene exhibits larger impacts in modifying the BC particle properties than those for the OH-initiated oxidation of isoprene and toluene.; Robert A. Welch Foundation [A-1417]; National Key Research and Development Program of China [2016YFC0202003]; National Natural Science Foundation of China [91544214]; National Basic Research Program of China [2013CB228503]; Special Fund for Strategic Pilot Technology Chinese Academy of Sciences [XDB05010500]; SCI(E); EI; PubMed; ARTICLE; guosong@pku.edu.cn; renyi-zhang@tamu.edu; 16; 8605-8612; 50
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/491576]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Guo, Song,Hu, Min,Lin, Yun,et al. OH-Initiated Oxidation of m-Xylene on Black Carbon Aging[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016.
APA	Guo, Song.,Hu, Min.,Lin, Yun.,Gomez-Hernandez, Mario.,Zamora, Misti L..,...&Zhang, Renyi.(2016).OH-Initiated Oxidation of m-Xylene on Black Carbon Aging.ENVIRONMENTAL SCIENCE & TECHNOLOGY.
MLA	Guo, Song,et al."OH-Initiated Oxidation of m-Xylene on Black Carbon Aging".ENVIRONMENTAL SCIENCE & TECHNOLOGY (2016).