| 珠穆朗玛峰地区雪冰中重金属浓度与季节变化 |
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| 引用本文： | 段建平,任贾文,秦翔,李月芳.珠穆朗玛峰地区雪冰中重金属浓度与季节变化[J].地理学报,2007,62(1):22-29. |
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| 作者姓名： | 段建平 任贾文 秦翔 李月芳 |
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| 作者单位： | 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 |
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| 基金项目： | 中国科学院知识创新工程项目
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国家自然科学基金 |
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| 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/m1);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(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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| 关 键 词： | 重金属 浓度 季节变化 珠穆朗玛峰 |
| 收稿时间： | 2006-09-17 |
| 修稿时间： | 2006-10-18 |
Heavy Metals Concentrations and Seasonal Variations in Snow of Mount Qomolangma Region |
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| DUAN Jianping,REN Jiawen,QIN Xiang,LI Yuefang.Heavy Metals Concentrations and Seasonal Variations in Snow of Mount Qomolangma Region[J].Acta Geographica Sinica,2007,62(1):22-29. |
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| Authors: | DUAN Jianping REN Jiawen QIN Xiang LI Yuefang |
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| Institution: | Key Laboratory of Cryosphere and Environment, Cold and Arid Region Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China |
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| Abstract: | 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.l. 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, Cu10-120, Zn29-4948, and Pb14-142, respectively. And δ18O determined by MAT-252, the time period of the snow pit spanning from autumn 2005 to summer 2004. Seasonal variations of the concentrations and δ18O 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. |
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| Keywords: | heavy metals concentration seasonal variations Mount Qomolangma region |
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