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首页> 外文会议>International Conference on Environmental Science and Technology >TEMPORAL AND SPATIAL VARIETY OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) ATMOSPHERIC DEPOSITION IN CHENGDU ECONOMIC REGION, CHINA
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TEMPORAL AND SPATIAL VARIETY OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) ATMOSPHERIC DEPOSITION IN CHENGDU ECONOMIC REGION, CHINA

机译：中国成都经济区的多环芳烃（PAHS）大气沉积的颞圆环芳烃（PAHS）大气沉积

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Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous; some of them have been paid more attention due to their carcinogenic and mutagenic properties. Atmospheric deposition is an important process for air-surface exchange of polycyclic aromatic hydrocarbons (PAHs). A year-round bulk (wet plus dry) deposition sampling campaign in mountain, plain, and basin sites was conducted in Chengdu Economic Region (CER), Sichuan Province, which is one of the largest agricultural provinces in China, and the total PAH emission ranked the first in China in 2003 with average emission of 5.35 kg km~(-2). The spatial and temporal variations of particle deposition fluxes and the potential influences of climate and landform on the fate of PAHs were discussed.The atmospheric deposition of total PAHs deposition fluxes ranged from 176.8 g m~(-2) yr~(-1) to 1138.8 g m~(-2) yr~(-1), with highest flux (1138.8 g m~(-2) yr~(-1)) at low mountain region with altitude less than 400 meters (Site S4), which maybe give an evidence of micro-cold-trapping effect in mountains. The deposition fluxes in cold seasons (spring and winter) were higher than in warm seasons (summer and autumn). The flux ratio of heavy molecular weight PAHs (HMW-PAHs, 5+6 rings PAHs) in autumn was more than in other seasons. The flux ratio of 4 rings PAHs increased in winter and spring.Contaminant source seasonality and temperature were controlling factors for PAHs seasonal flux characteristics after the discussion on seasonal variations of PAHs and controlling factors.
机译：多环芳烃（PAHS）普遍存在;由于其致癌性和诱变性质，其中一些人得到了更多的注意。大气沉积是多环芳烃（PAH）的空气表面交换的重要方法。在四川省成都经济区（CER）的山地，平原和盆地网站上进行全年散装（湿式干燥）沉积竞选活动，是中国最大的农业省份之一，也是PAH排放总量之一在2003年在中国排名第一个，平均排放为5.35公斤km〜（-2）。讨论了粒子沉积通量的空间和时间变化以及气候和地貌对PAHS命运的潜在影响。总PAHS沉积通量的大气沉积从176.8 gm〜（-2）Yr〜（-1）到1138.8 gm〜（-2）Yr〜（-1），低山脉（1138.8 gm〜（-2）Yr〜（-1）），高山地区，高度小于400米（网站S4），这可能给予山脉微寒捕获效果的证据。冷季节（春季和冬季）的沉积助熔剂高于温暖季节（夏季和秋季）。秋季重型分子量PAHS（HMW-PAH）（HMW-PAHS，5 + 6环PAH）的磁通率比其他季节更多。冬季和春季4环PAH的磁通比增加。在讨论PAHS和控制因素的季节性变化后，CONTAMINANT季节性和温度是对PAHS季节性通量特性的控制因素。

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