东天山乌鲁木齐河源1号冰川雪冰中痕量元素揭示的大气污染信息
THE SEASONAL VARIATIONS AND SOURCES OF TRACE ELEMENTS IN HEAD WATER GLACIER NO.1 IN Vr黰qi, EAST TIAN-SHAN
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摘要: 为认识东天山乌鲁木齐河源1号冰川地区大气中痕量元素的组成特征和污染信息,利用高分辨电感耦合等离子体质谱仪对2008年10月采自乌鲁木齐河源1号冰川雪坑中24个样品中可溶性痕量元素Al、Ba、Co、Cr、Cu、Li、Ni、Sb、Sr、U、V、Fe、Cd、Zn和Pb的浓度进行了测试和研究.结果表明,痕量元素的浓度最大值和最小值之比在27(Sb)到435(Li)之间,浓度最大值出现在夏季.除岩石和土壤粉尘外,人为污染是1号冰川中痕量元素的另一个重要来源.对于Pb和Cd,人为污染是主要来源.对比可知,乌鲁木齐河源1号冰川雪冰中痕量元素的浓度和沉降通量明显高于中亚其它地区冰川雪冰;更远远高于格陵兰和南极雪冰.研究揭示了该地区大气不仅受到较高粉尘的影响,也受到人为污染的影响.
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关键词:
- 痕量元素 /
- 粉尘 /
- 人为污染 /
- 沉降通量 /
- 乌鲁木齐河源1号冰川
Abstract: In order to understand the composition and potential pollution of the trace elements in the atmosphere on eastern Tian-Shan, concentrations of 15 trace elements ,e.g. Al, Ba, Co, Cr, Cu, Li, Ni, Sb, Sr, U, V, Fe, Cd, Zn and Pb were determined by high resolution inductively coupled plasma mass spectrometry(HR-ICP-MS). Samples were from a 2.4 m snow-pit collected on 25 October, 2008 from No.1 Glacier of head water in Vr黰qi. Results indicate that there were large changes in the concentrations of these trace elements, from the lowest concentration of U (0.006 ng·g-1) to the highest concentration of Fe (20871 ng·g-1). There were also large variations of Max/Min value, from 27(Sb) to 435(Li). The concentrations also had larger annual fluctuation, with higher values in summer. Crustal enrichment factors (EFc) of trace elements indicate that besides rock and soil dusts, anthropogenic pollution is an important source of trace elements in the atmosphere of the studied site, and is the main source for both Pb and Cd. Comparison with other sites in central Asia shows higher concentrations of trace elements in the studied site, and much higher than Greenland and Antarctic. The deposition flux of trace elements are 10 to 70 times higher than eastern Rongbu glacier, about 100 to 1000 times higher than in Greenland, and about 700 to 20000 times higher than in Antarctica. The atmosphere in this area was affected not only by higher loading of dusts but also anthropogenic pollution.-
Key words:
- trace elements /
- dust /
- anthropogenic pollution /
- deposition flux /
- No.1 Galcier of Vr黰qi
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[1] Hong S M, Candelone J P, Patterson C C, et al. Greenland ice evidence of hemispheric lead pollution two millennia ago by Greek and Roman civilizations[J]. Science, 1994, 265: 1841-1843 [2] Candelone J P, Hong S M, Pellone C, et al. Post-industrial revolution changes in large-scale atmospheric pollution of the northern hemisphere by heavy metals as documented in central Greenland snow and ice[J]. J Geophys Res, 1995, 100: 16605-16616 [3] Boutron C F, Görlach U, Candelone J P, et al. Decrease in anthropogenic lead, cadmium and zinc in Greenland snows since the late 1960s[J]. Nature, 1991, 353: 153-156 [4] Planchon F A M, Boutron C F, Barbante C, et al. Changes in heavy metals in Antarctic snow from Coats Land since the mid-19th to the late-20th century[J]. Earth Planet Sci Lett, 2002, 200(1/2): 207-222 [5] Schwikowski M, Barbante C, Doering T, et al. Post-17th-century changes of european lead emissions recorded in high-altitude alpine snow and ice[J]. Environ Sci Technol, 2004, 38 (4): 957 -964 [6] Barbante C, Schwikowski M, Döring T, et al. Historical record of European emissions of heavy metals to the atmosphere since the 1650s from alpine snow/ice cores drilled near Monte Rosa[J]. Environ Sci Technol, 2004, 38: 4085-4090 [7] Li Y F, Yao T D, Wang N L, et al. Recent changes of atmospheric heavy metals in a high elevation ice core from Muztagh Ata in east Pamirs: initial results[J]. Ann Glaciol, 2006, 43: 154-159 [8] 李真, 姚檀栋, 田立德,等. 慕士塔格冰芯记录的近50年来大气中铅含量变化[J]. 科学通报, 2006, 51(15): 1833-1836 [9] 李真. 幕士塔格冰川雪冰中重金属研究. 中国科学院研究生院博士论文, 2006: 56 [10] 段建平, 任贾文, 秦翔,等. 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 [11] 李月芳, 姚檀栋, 王宁练,等. 帕米尔东部慕士塔格冰芯Sb浓度变化记录揭示的近50a来中亚区域人类活动[J]. 冰川冻土, 2008, 30(3): 359-364 [12] Lee K, Hur S D, Hou S G, et al. Atmospheric pollution for trace elements in the remote high-altitude atmosphere in central Asia as recorded in snow from Mt Qomolangma (Everest) of the Himalayas[J]. Sci Total Environ, 2008, 404: 171-181 [13] Kaspari S, Mayewski P A, Handley M, et al. Recent increases in atmospheric concentrations of Bi, U, Cs, S and Ca from a 350-year Mount Everest ice core record[J]. J Geophys Res, 2009, 114(D0432)doi:10.1029/2008JD011088 [14] Hong S M, Lee K, Hou S, et al. An 800-year record of atmospheric As, Mo, Sn, and Sb in Central Asia in high-altitude ice cores from Mt. Qomolangma (Everest), Himalayas[J]. Environ Sci Technol, 2009, 43: 8060-8065 [15] 李传金, 李忠勤, 李月芳,等. 天山乌鲁木齐河源1号冰川积雪内痕量金属元素的季节变化及其环境意义[J]. 中国科学(D辑), 2007, 37(5 ): 676-681
[16] 李月芳, 姚檀栋, 李真,等. 高分辨电感耦合等离子体质谱仪测定中亚山地冰川雪冰中超痕量元素[J]. 分析化学, 2007, 35(1): 37-42 [17] 章新平,姚檀栋,田立德,等. 乌鲁木齐河流域不同水体中的氧稳定同位素[J].水科学进展, 2003,14(1):50-56 [18] Nriagu J O. A global assessment of natural sources of atmospheric trace metals[J]. Nature, 1989, 338: 47-49 [19] Wedepohl K H. The composition of the continental crust[J]. Geochim Cosmochim Acta, 1995, 59(7): 1217-1232 [20] Pacyna J M, Pacyna E G. An assessment of global and regional emissions of trace metals to the atmosphere from anthropogenic sources worldwide[J]. Environ Rev, 2001, 9: 269-298 [21] Aizen V B, Mayewski P A, Aizen E M, et al. Stable-isotope and trace element time series from Fedchenko glacier (Pamirs) snow/firn cores[J]. J Glaciol, 2009, 55(190): 275-291 [22] Barbante C, Boutron C, Morel C, et al. Seasonal variations of heavy metals in central Greenland snow deposited from 1991 to 1995[J]. J Environ Monit, 2003, 5: 328-335 [23] Hur S D, Xiao C D, Hong S M, et al. Seasonal patterns of heavy metal deposition to the snow on lambert Glacier basin, East Antarctic[J]. Atmos Environ, 2007, 41: 8567-8578 -
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