标题：Kinetics and mechanism of OH-induced alpha-terpineol oxidation in the atmospheric aqueous phase
作者：Li, Fenghua; Tang, Shanshan; Tsona, Narcisse T.; Du, Lin
作者机构：[Li, Fenghua; Tang, Shanshan; Du, Lin] Shandong Univ, Environm Res Inst, Qingdao 266237, Peoples R China.; [Tsona, Narcisse T.] Shandong Univ, Sch L 更多
通讯作者地址：Du, L (corresponding author), Shandong Univ, Environm Res Inst, Qingdao 266237, Peoples R China.
关键词：Atmospheric aqueous phase; alpha-Terpineol; OH radicals; Kinetics;; Mechanism; Optical properties
摘要：Kinetics and mechanism of alpha-terpineol oxidation by OH radicals were studied in the aqueous phase under acidic condition, and the optical properties of the reaction products were examined. Using the relative rate method, the rate constant of alpha-terpineol reaction with OH radicals was determined to be (1.3 +/- 0.3). 10(10) M-1 s(-1). The reaction products were analyzed by gas chromatography-mass spectrometry (GC-MS) and the reaction mechanism was proposed. The absorbance changes of the products were monitored by a UV-vis spectrophotometer, and alpha,beta-unsaturated ketone compounds were observed. A certain distribution of alpha-terpineol in the aqueous phase has the potential to be conducive to the formation of aqueous secondary organic aerosols. At the same time, in order to investigate the persistence of alpha-terpineol in the atmosphere, its lifetime towards reaction with OH in atmospheric water was determined to be 6.2 h and 1.0 h in urban and remote area, respectively.