乙撑硫脲的臭氧化实验研究。
Experimental studies on ozonation of ethylenethiourea.
机构信息
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
出版信息
J Environ Sci (China). 2011;23(1):65-9. doi: 10.1016/s1001-0742(10)60374-9.
The experimental study on ozonation of ethylenethiourea (ETU) is conducted. The reaction of gas-phase ETU with 0.63 x 10(-6) mol/L ozone is carried out in a 200-L reaction chamber. The secondary organic aerosol (SOA) resulted from the ozonation of gas-phase ETU is observed with a scanning mobility particle size (SMPS). The rapid exponential growth of SOA reveals that the atmospheric lifetime of ETU vapor towards ozone reaction is less than four days. The ozonation of dry ETU particles, ETU-contained water droplets and ETU aqueous solution is investigated with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer (VUV-ATOFMS). The formation of 2-imidazoline is observed in the ozonation of dry ETU particles and ETU-contained water droplets. The formation of 2-imidazoline and ethylenerea is observed in the ozonation of ETU aqueous solution.
开展了乙撑硫脲（ETU）臭氧化的实验研究。在 200L 反应室内进行气相 ETU 与 0.63x10(-6)mol/L 臭氧的反应。利用扫描迁移率颗粒大小谱仪（SMPS）观察到气相 ETU 臭氧化生成的二次有机气溶胶（SOA）。SOA 的快速指数增长表明，ETU 蒸气与臭氧反应的大气寿命小于四天。利用真空紫外光电离气溶胶飞行时间质谱仪（VUV-ATOFMS）研究了干燥 ETU 颗粒、含 ETU 水滴和 ETU 水溶液的臭氧化作用。在干燥 ETU 颗粒和含 ETU 水滴的臭氧化作用中观察到 2-咪唑啉的形成。在 ETU 水溶液的臭氧化作用中观察到 2-咪唑啉和乙撑二硫的形成。
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