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OALib Journal期刊
ISSN: 2333-9721
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珠穆朗玛峰地区雪冰中重金属浓度与季节变化
DOI: 10.11821/xb200701003, PP. 22-29
Keywords: 重金属,浓度,季节变化,珠穆朗玛峰
Abstract:
对2005年9月采自珠穆朗玛峰北坡海拔6523m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、Cu10~120、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(δ18O)进行了测试,雪坑样品对应的时间为2004年夏到2005年秋,δ18O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δ18O值和重金属元素的浓度都很低,而在非夏季风期间δ18O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。
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