珠穆朗玛峰地区雪冰中重金属浓度与季节变化  

Heavy Metals Concentrations and Seasonal Variations in Snow of Mount Qomolangma Region

作　　者：段建平[1] 任贾文[1] 秦翔[1] 李月芳[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈与环境联合重点实验室,兰州730000

出　　处：《地理学报》2007年第1期22-29,共8页Acta Geographica Sinica

基　　金：中科院知识创新工程重要项目(KZCX3-SW-344);国家自然科学基金项目(40501015)~~

摘　　要：对2005年9月采自珠穆朗玛峰北坡海拔6523 m的东绒布冰川积累区一批雪坑样品中重金属Ba,Co,Cu,Zn和Pb的浓度利用电感耦合等离子体质谱仪进行了测试,重金属浓度范围分别为(pg/ml);Ba2～227、Co2.8～15.7、Cu 10～120、Zn29～4948、Pb14～142。并利用气体稳定同位素质谱仪MAT-252对样品稳定氧同位素比率(!18O)进行了测试,雪坑样品对应的时间为2004年夏到2005年秋,"18O和重金属元素的浓度都存在着季节变化特征。在夏季风期间#18O值和重金属元素的浓度都很低,而在非夏季风期间$18O值和重金属元素浓度升高,反映了不同的水汽来源对重金属浓度季节变化的影响及其环境意义。Co,Cu,Pb,Zn的地壳富集系数(EFc)分别为:3.6、27、33、180,表明该地区Pb,Cu,Zn已经受到了人类活动的污染,其中Zn受到的污染最大。The concentrations of heavy metals Ba, Pb, Cu, Zn and Co in snow pit collected in September, 2005 from the accumulation area of the East Ronbuk Glacier （a.s.1. 6523 m）, which lies on the northern slope of Mt Qomolangma, were determined by inductively coupled plasma mass spectrometry （ICP-MS）, concentrations （pg/ml） of heavy metals vary from Ba2-227, Co2.8-15.7, Cul0-120, Zn29-4948, and Pb14-142, respectively. And δ^18O determined by MAT-252, the time period of the snow pit spanning from auturnn 2005 to summer 2004. Seasonal variations of the concentrations and δ^18O are observed, of which Pb, Cu, Zn and Co are much lower in summer monsoon season than that in non summer monsoon season, suggesting that different sources of heavy metals contributed to the site. EFc （crustal enrichment factors） is Co 3.6, Cu 27, Pb 33 and Zn 180, respectively. Higher EFc values of Pb, Cu and Zn suggest that Pb, Cu especially Zn mainly contributed by anthropogenic sources.

关 键 词：重金属 浓度 季节变化 珠穆朗玛峰 

分 类 号：X502[环境科学与工程—环境工程]