陈启宁;谢晴;

• 1:大连理工大学化工学院
• 2:工业生态与环境工程教育部重点实验室大连理工大学环境学院

摘要(Abstract)：

溢油事故发生后喷洒溢油分散剂是常用的应急措施之一,这使得溢油分散剂中的表面活性剂与石油中的重要污染物多环芳烃(PAHs)在海水中共存。光化学转化是水中PAHs的重要转化途径,这些共存表面活性剂如何影响PAHs在海水中的光化学消减还有待阐明。本研究选取溢油分散剂的重要活性成分吐温80和石油中2种不同类型的PAHs(菲和二苯并噻吩),通过光化学实验考察不同浓度吐温80对菲(PHE)和二苯并噻吩(DBT)在海水中的光降解速率常数和光解量子产率的影响,并通过量子化学计算的手段研究其影响机制。研究发现:吐温80可以使PHE和DBT的阳离子自由基回到稳定的基态,降低PHE和DBT的光解量子产率,从而抑制PHE和DBT的光降解。该结果表明,在评价溢油分散剂的风险性时不可忽视其对PAHs环境转化行为的影响。

关键词(KeyWords)： 溢油分散剂;表面活性剂;多环芳烃;光降解;海水

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21207013);; 大学生创新训练计划项目(201410141354)

作者(Author): 陈启宁;谢晴;

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