本文選題：二次有機氣溶膠(SOA) + 相態(tài)��； 參考：《中國環(huán)境科學》2017年05期

【摘要】：總結了國內外對二次有機氣溶膠(SOA)相態(tài)的研究進展,結果顯示不同條件下SOA可能是固態(tài)、不定形態(tài)、液態(tài).固態(tài)和不定形態(tài)SOA的體相擴散系數(shù)遠低于液態(tài)SOA,從而阻礙SOA的物質傳輸和化學轉化等物理化學過程.目前,SOA相態(tài)的研究主要集中在有限體系,例如α-蒎烯、異戊二烯、甲苯等揮發(fā)性有機物為前體物產生的SOA,缺乏實際大氣SOA的相態(tài)信息.此外,對無機鹽影響SOA相態(tài)的認識也十分有限.本文提出重污染形成過程中,相態(tài)可能是二次顆粒物快速增長、轉化的重要影響因素之一.因此,結合外場觀測、實驗室研究以及多層動力學模型研究重污染形成過程中SOA的相態(tài)及其對關鍵反應活性氣體的吸附、傳輸?shù)扔绊憴C制,有助于深入理解我國復合大氣污染條件下二次顆粒物的生成轉化機制.
[Abstract]:The research progress of secondary organic aerosol (SOA) phase at home and abroad is summarized. The results show that SOA may be solid, indeterminate and liquid under different conditions. The bulk diffusion coefficient of solid and indefinite SOA is much lower than that of liquid SOA, which hinders the physical and chemical processes such as material transport and chemical transformation of SOA. At present, the study of SOA phase state is mainly focused on the limited system, such as 偽 -pinene, isoprene, toluene and so on volatile organic compounds as precursors of SOA, lack of actual atmospheric SOA phase state information. In addition, the effect of inorganic salts on SOA phase is also very limited. In this paper, it is suggested that the phase state may be one of the important factors influencing the rapid growth and transformation of secondary particles during the formation of heavy pollution. Therefore, in combination with field observations, laboratory studies and multilayer dynamics models, the phase behavior of SOA during the formation of heavy pollution and its mechanism of adsorption and transport of key reactive active gases are studied. It is helpful to understand the formation and transformation mechanism of secondary particulate matter under the condition of complex air pollution in China.
【作者單位】： 北京大學環(huán)境科學與工程學院環(huán)境模擬與污染控制國家重點聯(lián)合實驗室;
【基金】：國家自然基金資助項目(41475127,41571130021,91544214,21190052,41121004) 國家“973”項目(2013CB228503);環(huán)境保護部公益項目(201409010) 環(huán)境模擬與污染控制國家重點聯(lián)合實驗室專項經費資助項目(14L02ESPC)
【分類號】：X513

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