浑善达克沙地沙尘气溶胶的化学元素组成及含量  

The Compositions of Chemical Elements Associated with Dust Particles from Hunshan Dake Sandland

作　　者：成天涛[1] 吕达仁[2] 于兴娜[1] 王庚辰[2] 陈建民[1] 

机构地区：[1]复旦大学环境科学与工程系,上海200433 [2]中国科学院大气物理研究所LAGEO,北京100029

出　　处：《过程工程学报》2006年第z2期100-104,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:49790020;40533017;20377008);复旦大学青年科学基金资助

摘　　要：利用2001年4月下旬到5月上旬内蒙古桑根达莱和北京站的近地面大气气溶胶采样及其化学元素分析资料,比较分析了晴天、一般沙尘天及沙尘暴天颗粒化学元素在PM2.5,PM2.5-10,PM10-中的相对含量.结果表明,颗粒化学元素质量浓度总和随着沙尘浓度增大而普遍增大,但其在PM中相对含量的变化并不相同于绝对含量增长.在扬沙或浮尘天气,表面粘附作用导致粗颗粒富集一定的污染元素,而在沙尘暴期间,受强天气过程影响大量污染元素被输送到下游区域.沙尘气溶胶中部分细颗粒来自富含Al,Ca,Fe等矿质元素的土壤,粗颗粒主要来自富含Si元素的沙粒.Na元素主要来自土壤而非沙地.The data of chemical element analyses about aerosol samples collected at Sanggen Dalai and Beijing sites from 21 April to 10 May in 2001 were employed to examine the compositions of chemical elements associated with dust particles in PM2.5,PM2.5-10,PM10-from Hunshan Dake sandland in clear,dusty and dust storm days.The concentrations of combined chemical elements increased with dust mass,which was not completely similar to the changes of chemical element percents in PM.During the common dusty days a part of pollution elements was uptaken and adhered to the dust surfaces,but most of them were transported into downwind regions by strong winds during the dust storm days.Large amounts of fine dust particles originated from the soils rich in the mineral elements of Al,Ca,Fe,etc.,and most of coarse dust particles originated from the desert lands rich in Si.The element of Na mainly originated from soil but desert.

关 键 词：浑善达克沙地 沙尘气溶胶 化学元素 

分 类 号：X513[环境科学与工程—环境工程]