大气颗粒物中微量营养元素Fe、Mn和Cu的来源与沉降  

The sources and deposition of three trace nutritional elements Fe,Mn and Cu in the atmospheric particulate

作　　者：余新安[1] 翁焕新[1] 张兴茂[1] 陈立红[1] 陈祥华[1] 

机构地区：[1]浙江大学环境与生物地球化学研究所,浙江杭州310027

出　　处：《海洋科学》2008年第3期44-48,共5页Marine Sciences

基　　金：国家自然科学基金资助项目(40172106)

摘　　要：测定了义乌市大气颗粒物中总悬浮颗粒物(TSP)及微量营养元素Fe、Mn和Cu的浓度,并对颗粒物粒径分布和外形进行了扫描电镜分析,同时分析了这3种金属的来源和沉降量。结果表明,微量营养元素Fe和Mn主要来源于地壳,而Cu来源于人为污染;Fe与Mn之间的相关性极显著;绝大部分颗粒物的粒径小于9μm;Fe和Mn湿沉降量大于干沉降量,而Cu以干沉降为主。That atmospheric depositions of the three trace nutritional elements are regarded as an important source of the water body is often neglected. In this study the concentrations of the TSP and the three trace elements Fe, Mn and Cu were detected, and the distribution of the particle size was analyzed by scanning electron microscope, then the sources and the depositions of the three trace elements were analyzed. The results showed that Fe and Mn mainly originated from the earth＇s crust, but Cu mainly originated from man-made pollution, and the significant correlation was determined between Fe and Mn. Most of the particle sizes were less than 9 μm, The wet depositions of Fe and Mn were higher than the dry deposition, but for Cu, it was opposite.

关 键 词：大气颗粒物 Fe MN CU 来源 粒径大小 大气沉降 

分 类 号：X171[环境科学与工程—环境科学]