Laboratory study on OH-initiated degradation kinetics of dehydroabietic acid

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	Laboratory study on OH-initiated degradation kinetics of dehydroabietic acid
	Lai, Chengyue; Liu, Yongchun; Ma, Jinzhu; Ma, Qingxin; He, Hong
刊名	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
	2015
卷号	17 期号:16 页码:10953-10962
英文摘要	Dehydroabietic acid (DHAA) is a specific organic tracer for the pyrolysis of conifer resin. To understand its atmospheric stability, the degradation behavior of particulate DHAA in the presence of hydroxyl radicals (OH) was investigated under different environmental conditions using a stainless steel reactor with volume of 30 cm(3), in the dark. At 25 degrees C and 40% relative humidity (RH), the second-order rate constant (k(2)) of pure DHAA with OH was measured to be 5.72 +/- 0.87 x 10(-12) cm(3) molecule(-1) s(-1). The influence of temperature, RH and mixing state on the degradation kinetics of DHAA were also investigated. At 40% RH, k(2) of pure DHAA increases with increasing temperature and follows the Arrhenius equation k(2) = (8.9 +/- 1.9) x 10(-10) exp[-(1508.2 +/- 64.2)/T], while RH does not have significant impact on k(2) at 25 degrees C. At 25 degrees C and 40% RH, compared with pure DHAA, the corresponding k(2) for DHAA mixed with (NH4)(2)SO4 decreased to 4.58 +/- 0.95 x 10(-12) cm(3) molecule(-1) s(-1), while the value was 3.30 +/- 0.79 x 10(-12) cm(3) molecule(-1) s(-1) when mixed with soot. The atmospheric lifetime of DHAA varied from 2.3 +/- 0.2 to 4.4 +/- 0.8 days under different environmental conditions. This study indicates that degradation of DHAA by OH radicals is appreciable, and a significant error in source apportionment should be introduced if the contribution of degradation to DHAA concentration is not considered during air mass aging.
研究领域[WOS]	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000352707200071
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32477]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Lai, Chengyue,Liu, Yongchun,Ma, Jinzhu,et al. Laboratory study on OH-initiated degradation kinetics of dehydroabietic acid[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2015,17(16):10953-10962.
APA	Lai, Chengyue,Liu, Yongchun,Ma, Jinzhu,Ma, Qingxin,&He, Hong.(2015).Laboratory study on OH-initiated degradation kinetics of dehydroabietic acid.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,17(16),10953-10962.
MLA	Lai, Chengyue,et al."Laboratory study on OH-initiated degradation kinetics of dehydroabietic acid".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17.16(2015):10953-10962.