太湖大气气溶胶中硫稳定同位素组成分析  

Analysis of sulfur isotopes in Taihu aerosol

作　　者：郭照冰[1,2] 包春晓[1,2] 李占清 James Farquhar 吴南平 

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]江苏省大气环境监测与污染控制高技术研究重点实验室,江苏南京210044 [3]ESSIC and Department of Atmospheric and Oceanic Science,University of Maryland,College Park,Maryland,USA [4]ESSIC and Department of Geology,University of Maryland,College Park,Maryland,USA

出　　处：《地球化学》2012年第5期411-414,共4页Geochimica

基　　金：教育部留学回国人员启动基金(2012s001);江苏省环保科研课题(201017);江苏省"333高层次人才工程";"六大人才高峰"及"青蓝工程"资助项目;校科研项目(20110374);江苏省大学生实践创新计划项目(11CX006)

摘　　要：用MAT-253同位素质谱仪对太湖大气气溶胶中的硫稳定同位素组成特征进行了分析。结果显示,太湖大气气溶胶中δ34S数值变化范围为4.46‰~9.87‰,表明该地区大气气溶胶的主要硫源与当地燃煤排放直接相关。Δ33S绝对值普遍大于0.1‰,说明太湖大气气溶胶中存在显著的硫稳定同位素非质量分馏效应;基于正Δ33S和负Δ36S的关联,揭示太湖气溶胶中硫稳定同位素的分馏异常主要与平流层SO2发生的光化学反应有关,该科学问题迫切需要做进一步系统深入的研究。MAT-253 isotope mass spectrometer is adopted to measure sulfur multiple isotopes in Taihu aerosols.The δ34S values of Taihu aerosol samples range from 4.46‰ to 9.87‰,indicating the main sulfur source is from direct emissions of coal combustion.Absolute values of Δ33S are generally larger than 0.1‰,showing the presence of a remarkable sulfur isotope mass-independent fractionation effect in Taihu aerosols.Based on the correlation between positive Δ33S and negative Δ36S,we proposed that sulfur isotope anomaly in Taihu aerosols is mainly related to the oxidation of SO2in the stratosphere.A systematical and intensive investigation on sulfur isotope anomaly in Taihu aerosol in needed.

关 键 词：硫稳定同位素 非质量分馏效应 气溶胶 太湖 

分 类 号：P597[天文地球—地球化学]