北京石花洞大气沉降水溶态重金属研究  

Variations of Water-Soluble Heavy Metals in Atmospheric Depositions at the Shihua Cave in Beijing,China

作　　者：米小建[1,2] 彭小桃 邓肖敏 刘粤峰 李汉杰 谢宇[1] 陈琼 周厚云[1] MI Xiao-jian;PENG Xiao-tao;DENG Xiao-min;LIU Yue-feng;LI Han-jie;XIE Yu;CHEN Qiong;ZHOU Hou-yun(School of Geography,South China Normal University,Guangzhou 510631,China;Department of Geography,Lingnan Normal University,Zhanjiang Guangdong 524048,China)

机构地区：[1]华南师范大学地理科学学院,广州510631 [2]岭南师范学院地理系,广东湛江524048

出　　处：《矿物岩石地球化学通报》2020年第5期1038-1043,共6页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金项目(41473093,40973009)。

摘　　要：为了更好地理解洞穴沉积物中重金属元素含量变化的控制机制及其气候环境意义,在北京石花洞地区连续采集了12个月的大气沉降样品,用ICP-MS测试了其中水溶态的重金属元素含量。结果表明,北京石花洞大气沉降中水溶态重金属富集程度高,不同重金属的富集程度不同;各重金属元素的沉降通量和富集因子变化趋势相似。表明这些重金属可能受到多种人为源的共同影响。该地区大部分重金属元素的沉降通量比偏远地区高,但其中Zn的沉降通量与北京城区的相当,仅次于典型工业城市(如布尔萨和唐山),说明石花洞地区大气Zn污染较为严重。To explore the controlling mechanism and the climatic and environmental significance of variations of heavy metals in speleothems,atmospheric deposition samples were collected monthly at the Shihua Cave in Beijing from November 2012 to October 2013.Water-soluble contents of eight heavy metals(Ti,Cr,Co,Ni,Cu,Zn,Cd and Pb)in these atmospheric deposition samples were determined with an ICP-MS.The results showed that water-soluble contents of all heavy metals in the atmospheric deposition samples were relatively high,and enrichment factors of heavy metals were generally high while their enrichments were varied,and the seasonal deposition flux trends of heavy metals were similar to their seasonal enrichment factor trends.The water-soluble heavy metals in atmospheric depositions at the Shihua Cave might be affected jointly by various anthropogenic sources.The deposition fluxes of most heavy metals at the Shihua Cave were higher than those at remote areas,especially,the deposition flux of Zn,which was comparable to those obtained in Beijing urban areas and slightly less than those obtained at heavily industrialized cities,such as Bursa and Tangshan,indicating that the atmospheric Zn pollution at the Shihua Cave was relatively serious.

关 键 词：大气沉降 重金属元素 沉降通量 华北 

分 类 号：P595[天文地球—地球化学]