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青岛沿海地区春季大气颗粒物的矿物组成特征和来源分析
冯旭光1, 蒋富清1, 朱潇1, 张晋1, 董江1, 王长庆2, 李安春1
1.中国科学院海洋研究所海洋地质与环境重点实验室;2.中国地质大学武汉工程学院
摘要:
近年来,青岛地区环境污染日益严重,而大气颗粒物作为主要的污染物,其矿物组成和来源还缺乏系统的研究。因此作者于2016年春季采集总悬浮颗粒物样品,对其碎屑和黏土矿物进行了分析,并对颗粒物来源进行了系统的研究。X-射线衍射分析结果表明,在不同空气质量采集的样品中,矿物组成有明显差异。对较差天气下采集的样品进行黏土矿物分析,识别出伊利石、蒙皂石、绿泥石和高岭石等四种主要黏土矿物。结合蒙皂石-伊利石-高岭石三角图解、亚洲沙尘暴数值预报系统和颗粒物后向轨迹分析,对较差天气下采集的颗粒物来源进行分析,发现颗粒物主要来自亚洲内陆(轨迹占比48.3%)和青岛附近地区(轨迹占比51.7%);对较好天气下采集的样品进行后向轨迹分析,发现颗粒物不仅有亚洲内陆(轨迹占比34.43%)和青岛附近地区的来源(轨迹占比42.62%),还有东南向气流搬运而来的海盐颗粒物(轨迹占比22.95%)。
关键词:  大气颗粒物  碎屑矿物  黏土矿物  后向轨迹分析
DOI:10.11759/hykx20180413001
分类号:PP736
基金项目:国家自然科学“中新世以来奄美三角盆地的风尘记录及其对构造尺度东亚古气候的指示”(编号: 41576050, 41776065) ; 中国科学院战略性先导科技专项(A)类(XDA11030302), “全球变化与海气相互作用”( 编号: GASI-GEOGE-02-03)资助.
The mineral composition and source of the atmospheric particulates in coast areas of Qingdao in spring
FENG Xu-guang1, JIANG Fu-qing1, ZHU Xiao1, ZHANG Jin1, DONG Jiang1, WANG Chang-qing2, LI An-chun1
1.Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences;2.Faculty of Engineering,China University of Geosciences
Abstract:
The environmental pollution in Qingdao is becoming more and more serious in recent years. However, atmospheric particulates which are the main pollutants are still lack of systematic study on its mineral composition and sources. Therefore, we collected the total suspended particles in the spring of 2016, and study the detrital minerals and clay minerals. Furthermore, we analyze the sources and genesis of these particulate matters. The results of X-ray diffraction analysis show that there are significant differences in the mineral composition of atmospheric dust between two different air quality types. Through the analysis of clay minerals collected from the poor air quality, four main clay minerals, illite, smectite, chlorite and kaolinite, are identified. According to the triangular plot of smectite-illite-kaolinite, Asian dust storm prediction model and Hybrid Single Particle Lagran-gian Integrated Trajectory Model, we argue that the sources of these particles in the poor air quality mainly come from the arid Asian interior(48.3%) and the vicinity of Qingdao(51.7%). The backward trajectory analysis based on Hybrid Single Particle Lagran-gian Integrated Trajectory Model, we argue that not only these particles collected in good air quality are from the arid Asian interior (34.43%) and the vicinity of Qingdao(42.62%), but also there are sea-salt particles which are transported from the southeast of Qingdao(22.95%).
Key words:  Atmospheric particulates  detrital minerals  clay minerals  backward trajectory analysis
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