A study of the atmospheric VOCs of Mount Tai in June 2006
A study of the atmospheric VOCs of Mount Tai in June 2006
复制标题
DOI：
10.1016/j.atmosenv.2009.02.013
复制
发表时间：
2009-05
影响因子：
5
通讯作者：
Mao Ting;Wang Yue-si;Xu Hong-hui;Jiang Jie;Wu Fang-kun;Xu Xiao-bin
中科院分区：
文献类型：
--
作者：
Mao Ting;Wang Yue-si;Xu Hong-hui;Jiang Jie;Wu Fang-kun;Xu Xiao-bin
2006年6月在泰山山顶进行了密集的实地调查，以了解当地和区域来源对大气挥发性有机化合物(VOCs)分布的影响。共采集60份样品，采用定量分析方法进行测定。泰山空气中总挥发性有机化合物(TVOCs)浓度为6.95±5.71 ppb。芳香烃对TVOCs的贡献最大，其次是烷烃和卤代烃。位于泰山脚下的一家聚氯乙烯工厂排放的高水平卤代烃占TVOCs的20%。烯烃和环烷烃对总VOCs的贡献很小。调查了4个物种浓度的昼夜差异和昼夜变化，并详细讨论了气象参数、来源和输送特征等因素对它们的影响。回溯轨迹分析表明，相对较高的VOCs水平与污染地区污染物的长距离迁移有关。气团的垂直运动对VOCs水平的变化也有较大影响。用来估计采样点距离的VOCs的变异性-寿命关系的结果表明，泰山代表了偏远站点和来源附近的站点之间的中间条件。
Intensive field investigations were conducted at the summit of Mount Tai in June 2006 to understand the effects of the local and regional sources on atmospheric volatile organic compounds (VOCs) distributions. A total of 60 samples were collected and determined by quantitative analytical methods. The concentrations of the total VOCs (TVOCs) observed in the air of Mount Tai were 6.95 ± 5.71 ppb. Aromatic hydrocarbons provided the largest contribution to TVOCs, followed by alkanes and halocarbons. High levels of halocarbons accounted for 20% of TVOCs due to emission from a PVC plant located at the foot of Mount Tai. Alkenes and cycloalkanes contributed little to the total VOCs. The day-and-night differences and day-to-day variations in the concentrations of four selected species were investigated and the effects of several factors such as meteorological parameters, sources and transport characteristics on them were discussed in details. A back trajectory analysis showed that relatively higher levels of VOCs were related to long-range transport of pollutants from polluted areas. The vertical motions of air masses also had a large impact on the variations of the levels of VOCs. The result of the variability–lifetime relationships of VOCs, which is used to estimate the remoteness of the sampling location, showed that Mount Tai represents intermediate conditions between remote sites and sites in the vicinity of sources.