青藏高原五条冰川表雪中痕量元素的空间分布及污染评估
Spatial distribution and pollution assessment of trace elements in the surface snow of five glaciers on the Tibetan Plateau
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摘要: 为了认识青藏高原雪冰中痕量元素的空间分布特征与污染程度，对2013年4-5月采自求勉雷克、煤矿、玉珠峰、小冬克玛底和古仁河口冰川的表面样和雪坑样进行消解处理，并利用高分辨扇形磁场等离子体质谱仪（ICP-SFMS）测试了样品中19种痕量元素（Al、As、Ba、Co、Cr、Cs、Cu、Fe、Li、Mn、Mo、Pb、Rb、Sb、Sr、Ti、Tl、U、V）的总浓度.通过对5条冰川表面样进行空间对比，发现痕量元素在唐古拉山以北的求勉雷克、煤矿和玉珠峰冰川中浓度较高，在3条冰川中元素浓度的平均值在0.05 ng·g-1（Tl）—6579.62 ng·g-1（Al）之间，痕量元素在唐古拉山小冬克玛底冰川及唐古拉山以南的古仁河口冰川中浓度较低，在小冬克玛底冰川中元素的浓度介于0.004 ng·g-1（Tl）—103.44 ng·g-1（Al）之间，在古仁河口冰川中元素的浓度介于0.006 ng·g-1（Tl）—361.83 ng·g-1（Al）之间.计算痕量元素总浓度的富集系数（EF）表明，在5条冰川雪冰中的V、Mn、U、Ba、Rb主要来自于地壳粉尘，Sb、Mo、Pb、Cu、As在一些冰川雪冰中具有明显或较为严重的污染（EF≥5），这5种元素可能来自于有色金属冶炼、交通排放、化石燃料燃烧等人类活动.利用后向轨迹的聚类分析表明，5条冰川在非季风时期主要受到盛行西风的影响，其中求勉雷克、煤矿和玉珠峰冰川中的痕量元素主要来自中亚及新疆等地，小冬克玛底和古仁河口冰川中的痕量元素则主要来自于南亚及青藏高原西部地区.Abstract: In order to investigate the spatial distribution and degree of pollution of trace elements in snow and ice from the Tibetan Plateau (TP),surface snow and snow pit samples were collected from Qiumianleike (QMLK),Meikuang (MK),Yuzhufeng (YZF),Xiaodongkemadi (XDKMD) and Gurenhekou (GRHK) glaciers during April to May of 2013. The total concentrations of 19 trace elements (Al,As,Ba,Co,Cr,Cs,Cu,Fe,Li,Mn,Mo,Pb,Rb,Sb,Sr,Ti,Tl,U,V) in digested snow samples were determined by inductively coupled plasma sector field mass spectrometry (ICP-SFMS). Comparing the surface snow samples of the 5 glaciers,the results indicate that the concentrations of the trace elements in the QMLK,MK,YZF glaciers (the region north of Tanggula Mountains (TGL Mts.)) were higher than those in the XDKMD glacier (TGL Mts.) and GRHK glacier (the region south of TGL Mts.). The average concentrations of the trace elements in the QMLK,MK and YZF glaciers were between 0.05 ng·g-1 (Tl) and 6579.62 ng·g-1 (Al). The concentrations of the trace elements in the XDKMD glacier were between 0.004 ng·g-1 (Tl) and 103.44 ng·g-1 (Al), and those in the GRHK glacier were between 0.006 ng·g-1 (Tl) and 361.83ng·g-1 (Al). EF calculations show that V,Mn,U,Ba and Rb might originate from the dust in 5 glaciers. Pollution of Sb,Mo,Pb,Cu and As were more serious (EF≥5),which might derive from human activities such as nonferrous metals melting,traffic emission and fossil combustion. The cluster analyses of backward air trajectories indicate that westerly air masses prevailed in the 5 glaciers during the non-monsoon seasons. The trace elements from Central Asia and Xinjiang province could be transported to the QMLK,MK and YZF glaciers,while the trace elements from South Asia and the western TP could be transported to the XDKMD and GRHK glaciers.
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Key words:
- trace elements /
- total concentration /
- spatial distribution /
- pollution assessment
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[1] DONG Z W,KANG S C,QIN X,et al. New insights into trace elements deposition in the snow packs at remote alpine glaciers in the northern Tibetan Plateau,China[J]. Science of the Total Environment.,2015,529: 101-113. [2] 效存德,秦大河,姚檀栋,等.南、北极和青藏高原现代降水中Pb,Cd反映的全球大气污染[J].科学通报,1999,44(23):2558-2563. XIAO C D,QIN D H,YAO T D,et al. The global pollution revealed by Pb,Cd in the surface snow of Antarctic,Arctic and Qinghai-Xizang Plateau[J]. Chinese Science Bulletin,1999,44(23): 2558-2563(in Chinese).
[3] 霍文冕,姚檀栋,李月芳.达索普冰芯中Pb记录反映的大气污染及其同位素证据[J].冰川冻土,1999,21(2):125-128. HUO W M,YAO T D,LI Y F. The Record of lead pollution and its isotopic evidence in dasuopu ice core[J]. Journal of Glaciology and Geocryology,1999,21(2): 125-128(in Chinese).
[4] 霍文冕,姚檀栋,李月芳.7000 m处冰芯中Pb记录的人类活动污染[J].科学通报,1999,44(9):978-981. HUO W M,YAO T D,LI Y F. Increasing atmospheric pollution revealed by Pb record of a 7000 m ice core[J]. Chinese Science Bulletin,1999,44(9): 978-981(in Chinese).
[5] 李月芳,姚檀栋,王宁连,等.可可西里马兰冰川冰芯中Cd和Pb的浓度[J].环境化学,2002,21(2):194-196. LI Y F,YAO T D,WANG N L,et al. The concentrations of Cd and Pb in ice core from malan glacier,Qinghai[J]. Environmental Chemistry,2002,21(2): 194-196(in Chinese).
[6] 李月芳,姚檀栋,王宁练,等.青藏高原古里雅冰芯中痕量元素镉记录的大气污染:1900—1991[J].环境化学,2000,19(2):176-180. LI Y F,YAO T D,WANG N L,et al. Atmosphere pollution revealed by cadmium in the GULIYA ice core,Qinhai Tibet Plateau: 1990—1991[J].Environmental Chemistry,2000,19(2): 176-180(in Chinese).
[7] LI Z,YAO T D,TIAN L D,et al. Atmospheric Pb variations in Central Asia since 1955 from Muztagata ice core record,eastern Pamirs[J].Chinese Science Bulletin,2006,51(16): 1996-2000. [8] 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,east Pamirs:Initial results[J]. Annals of Glaciology,2006,43(1): 154-159. [9] DUAN J P,WANG L L,REN J W,et al. Seasonal variations in heavy metals concentrations in Mt. Qomolangma Region snow[J]. Journal of Geographical Sciences,2009,19(2): 249-256. [10] KASPARI S,MAYEWSKI P A,HANDLEY M,et al. A high-resolution record of atmospheric dust composition and variability since AD 1650 from a Mount Everest ice core[J]. Journal of Climate,2009,22(14): 3910-3925. [11] 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]. Journal of Geophysical Research,2009,114(D4): D04302.1-D04302.14. [12] LIU Y P,HOU S G,HONG S,et al. High-resolution trace element records of an ice core from the eastern Tien Shan,central Asia,since 1953 AD[J]. Journal of Geophysical Research,2011,116(D12): D12307.1-D12307.14. [13] HUANG J,KANG S C,ZHANG Q G,et al. Atmospheric deposition of trace elements recorded in snow from the Mt. Nyainqentanglha region,southern Tibetan Plateau[J]. Chemosphere,2013,92(8): 871-881. [14] CONG Z Y,KANG S C,ZHANG Y L,et al. Atmospheric wet deposition of trace elements to central Tibetan Plateau [J]. Applied Geochemistry,2010,25(9): 1415-1421. [15] LIU B,KANG S C,SUN J M,et al. Wet precipitation chemistry at a high-altitude site (3,326 m a.s.l.) in the southeastern Tibetan Plateau[J]. Environmental Science and Pollution Research,2013,20(7): 5013-5027. [16] OSTERBERG E C,HANDLEY M J,SNEED S B,et al. Continuous ice core melter system with discrete sampling for major ion,trace element,and stable isotope analyses[J]. Environmental Science & Technology,2006,40(10): 3355-3361. [17] KRACHLER M,ZHENG J,FISHER D,et al. Analytical procedures for improved trace element detection limits in polar ice from Arctic Canada using ICP-SMS[J]. Analytica Chimica Acta,2005,530(2): 291-298. [18] 熊隆飞,李月芳,李真.基于两种样品前处理方法对比研究小冬克玛底冰川雪坑中痕量元素[J].环境化学,2015,34(3):520-528. XIONG L F,LI Y F,LI Z. Comparative study of trace elements in snow pit from Xiaodongkemadi glacier in Tanggula mountain based on two sample preparation method[J]. Environmental Chemistry,2015,34(3): 520-528(in Chinese).
[19] 刘亚平,侯书贵,李月芳,等.极地雪冰样品超痕量重金属分析实验器具的酸洗方法[J].冰川冻土,2008,30(6):1007-1012. LIU Y P,HOU S G,LI Y F,et al. The acid-cleaning method of labwares of analysis of ultra low concentration heavy metals in antarctic and arctic snow and ice samples[J]. Journal of Glaciology and Geocryology,2008,30(6): 1007-1012(in Chinese).
[20] 齐文文,张百平,庞宇,等.基于TRMM数据的青藏高原降水的空间和季节分布特征[J].地理科学,2013,33(8):999-1005. QI W W,ZHANG B P,PANG Y,et al. TRMM-data-based spatial and seasonal patterns of precipitation in the Tibetan Plateau[J].Scientia Geographica Sinica,2013,33(8): 999-1005(in Chinese).
[21] 皇翠兰,蒲健辰.西大滩煤矿冰川区冰川冰、雪和河水的阳离子特征[J].冰川冻土,1995,17(3):283-288. HUANG C L,PU J C. The features of cations within glacier ice,snow and river water in the district of Xidatan Meikuang Glacier[J]. Journal of Glaciology and Geocryology,1995,17(3): 283-288(in Chinese).
[22] 梁潇云,刘屹岷,吴国雄.青藏高原隆升对春、夏季亚洲大气环流的影响[J].高原气象,2005,24(6):837-845. LIANG X Y,LIU Y M,WU G X. The impact of Qinghai-Xizang Plateau uplift on asian general circulation in spring and summer[J].Plateau Meteorology,2005,24(6): 837-845(in Chinese).
[23] 何钰,李国平.青藏高原大地形对华南持续性暴雨影响的数值试验[J].大气科学,2013,37(4):933-944. HE Y,LI G P. Numerical experiments on influence of Tibetan Plateau on persistent heavy rain in South China[J]. Chinese Journal of Atmospheric Sciences,2013,37(4): 933-944(in Chinese).
[24] 张坤,李忠勤,王飞腾,等.天山乌鲁木齐河源1号冰川积累区气溶胶和表层雪中可溶性矿物粉尘的变化特征及相互关系——以Ca2+、Mg2+为例[J].冰川冻土,2008,30(1):113-118. ZHANG K,LI Z Q,WANG F T,et al. Soluble mineral dusts in aerosol and surface snow on the glacier No.1 at the Headwaters of Urumqi River,East Tianshan Mountains: Characteristics and their interrelation-taking calcium and magnesium as examples[J]. Journal of Glaciology and Geocryology,2008,30(1): 113-118(in Chinese).
[25] 余光明,徐建中,康世昌,等.祁连山老虎沟12号冰川微粒在沉积后过程的变化特征[J].冰川冻土,2014,36(6):1394-1402. YU G M,XU J Z,KANG S C,et al. Post-depositional process features of the insoluble microparticles on the Laohugou Glacier No.12,Qilian Mountains. Journal of Glaciology and Geocryology[J]. 2014,36(6): 1394-1402(in Chinese).
[26] 李洋,曲斌,康世昌,等.念青唐古拉山扎当冰川雪冰中不溶性有机碳含量及其辐射强迫研究[J].环境科学学报,2016,36(3):802-811. LI Y,QU B,KANG S C,et al. Concentration and radiative forcing of water-insoluble organic carbon of Zhadang glacier on western Nyainqentanglha[J]. Acta Scientiae Circumstantiae,2016,36(3): 802-811(in Chinese).
[27] LI C L,KANG S C,ZHANG Q G. Elemental composition of Tibetan Plateau top soils and its effect on evaluating atmospheric pollution transport[J]. Environmental Pollution,2009,157: 2261-2265. [28] Wedepohl K H. The composition of the continental crust[J]. Geochimica et Cosmochimica Acta, 1995,59(7): 1217-1232. [29] SUTHERLAND R A. Bed sediment-associated trace metals in an urban stream,Oahu,Hawaii[J]. Environmental Geology,2000,39(6): 611-627. [30] ZHANG H,WANG Z F,ZHANG Y L,et al. The effects of the Qinghai-Tibet railway on heavy metals enrichment in soils[J]. Science of the Total Environment,2012,439: 240-248. [31] YI Y J,SUN J,TANG C H,et al. Ecological risk assessment of heavy metals in sediment in the upper reach of the Yangtze River[J]. Environmental Science and Pollution Research,2016,23(11): 11002-11013. [32] NRIAGU J O. A global assessment of natural sources of atmospheric trace metals[J]. Nature,1989,338: 47-49. [33] [34] XU B Q,YAO T D,LIU X Q,et al. Elemental and organic carbon measurements with a two-step heating-gas chromatography system in snow samples from the Tibetan Plateau[J]. Annals of Glaciology,2006,43: 257-262. [35] 高少鹏.青藏高原雪冰中的燃烧排放指示物及其环境意义[D].北京:中国地质大学博士学位论文,2016. GAO S P. The Tracers of combustion emission in snow of Tibetan Plateau and their environmental implications[D]. Beijing: China University of Geosciences Doctoral Dissertation,2016(in Chinese). [36] 游超,姚檀栋,邬光剑.雪冰中生物质燃烧记录研究进展[J].地球科学进展,2014,29(6):662-673. YOU C,YAO T D,WU G J. Research progress on biomass burning records in snow and ice[J]. Advance in Earth Sciences,2014,29(6): 662-673(in Chinese).
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