摘要
在我国自己建立的加速器质谱计（ＡＭＳ）技术的基础上，利用^（１４）Ｃ的特征的生物来源示踪性能，将ＡＭＳ技术运用于我国大气气溶胶来源的研究。我们建立了大气气溶胶采样一石墨碳制备─ＡＭＳ测定的全部样品处理过程，对北京市中关村地区、东单地区在采暖期和非采暧期的气溶胶样品和湖南南岳、山东青岛的气溶胶及这些地区的地表土进行了ＡＭＳ测定，将多元统计方法与ＡＭＳ方法相结合，从中分析这些样品中微量元素组分和含碳组分的来源。结果表明，大气气溶胶含碳组分具有与微量元素组分不同的来源特征。因此，在大气气溶胶中，微量元素组分和含碳组分含量大致相同，然而其来源却有很大的差异，将它们结合起来开展环境领域的研究是十分有意义的，这种结合将促使一门新的学科“Ｍｉｃｒｏｒａｄｉｏｃａｒｂｏｎｃｈｅｍｉｓｔｒｙ”兴起，从而在环境科学更加广泛的领域发挥作用。
?14)C technique as the tracer of biogenic origins was applied in the source identification of aerosols in China on AMS facility. The whole process of sampling graphite target preparation and AMS measurements procedure were set up. The aerosols samples from Zhongguancun region, Dongdan, Bejing in space-heating and no-space-heating seasons and Nanyue, Hunan,Qingdao, Shandong were measured. The sources of trace elements and carbonaceous particles were analyzed by the AMS method combined with multivariate analysis models. The results show that the trace elements and carbonaceous components have similar mass percentage in aerosols, but their source differ greatly. It is essential to combine the AMS method with factor analysis models in environmental studies, and the combination will lead the raise of a new environmental branch named 'microradiocarbonchemistry' , and play a role in other fields of environmental sciences.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1996年第2期130-141,共12页
Acta Scientiae Circumstantiae
基金
国家自然科学基金
