Sciences in Cold and Arid Regions ›› 2017, Vol. 9 ›› Issue (6): 568579.doi: 10.3724/SP.J.1226.2017.00568
Variations of trace elements and rare earth elements (REEs) treated by two different methods for snow-pit samples on the Qinghai-Tibetan Plateau and their implications
YueFang Li1, Zhen Li1, Ju Huang1,2, Giulio Cozzi3, Clara Turetta3, Carlo Barbante3, LongFei Xiong1
- 1. State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Institute for the Dynamics of Environmental Processes, National Research Council (IDPA-CNR), University of Venice, Dorsoduro 2137, 30123 Venice, Italy
Variations of trace elements and rare earth elements (REEs) treated by two different methods for snow-pit samples on the Qinghai-Tibetan Plateau and their implications
YueFang Li1, Zhen Li1, Ju Huang1,2, Giulio Cozzi3, Clara Turetta3, Carlo Barbante3, LongFei Xiong1
- 1. State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Institute for the Dynamics of Environmental Processes, National Research Council (IDPA-CNR), University of Venice, Dorsoduro 2137, 30123 Venice, Italy
摘要: Although previous investigations of the trace elements in snow and ice from the Qinghai-Tibetan Plateau obtained interesting information about pollution from human activities on the plateau, most were based on traditional acidification methods. To emphasize the influence of the different sample-preparation methods on the records of trace elements and rare earth elements, snow samples were collected from glaciers on the Qinghai-Tibetan Plateau in China and prepared using two methods: traditional acidification and total digestion. Concentrations of 18 trace elements (Al, Ti, Fe, Rb, Sr, Ba, V, Cr, Mn, Li, Cu, Co, Mo, Cs, Sb, Pb, Tl, and U), along with 14 rare earth elements (REEs: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), Y, and Th in the snow samples, were measured using inductively coupled plasma-sector field mass spectrometry (ICP-SFMS). The results showed that the mass fraction of the trace elements (defined as ratio of concentration in the acid-leachable fraction to that in the digested sample) such as Mo, Ti, Al, Rb, and V, varied from 0.06 to 0.5. The mass fraction of other trace elements varied from about 0.6 to more than 0.9; those of the REEs, Y, and Th varied from 0.34 to 0.75. Lower mass fractions will lead to an overestimated contribution of other sources, especially human activities, and the underestimated fluxes of these trace elements (especially REEs, Y, and Th, as well as dust) if the REEs are used as the proxy for the crust dust. The two sample-preparation methods exhibited different REE normalized distribution patterns, REE ratios, and provenance-tracing results. The REE normalized distribution patterns and proxies in the digested samples are more reliable and integrated than those found in traditional acidification method for dust-provenance tracing.
Barbante C, Schwikowski M, Döring T, et al., 2004. Historical record of European emissions of heavy metals to the atmosphere since the 1650s from Alpine snow/ice cores drilled near Monte Rosa. Environmental Science & Technology, 38(15): 4085-4090, DOI:10.1021/es049759r. Boutron CF, Görlach U, Candelone JP, et al., 1991. Decrease in anthropogenic lead, cadmium and zinc in Greenland snows since the late 1960s. Nature, 353(6340): 153-156, DOI:10.1038/353153a0. Candelone JP, Hong SM, Pellone C, et al., 1995. Post-Industrial Revolution changes in large-scale atmospheric pollution of the northern hemisphere by heavy metals as documented in central Greenland snow and ice. Journal of Geophysical Research: Atmospheres, 100(D8): 16605-16616, DOI:10.1029/95JD00989. Dong ZW, Kang SC, Qin X, et al., 2015. New insights into trace elements deposition in the snow packs at remote alpine glaciers in the northern Tibetan Plateau, China. Science of the Total Environment, 529: 101-113, DOI:10.1016/j.scitotenv.2015.05.065. Dong ZW, Kang SC, Qin DH, et al., 2016a. Provenance of cryoconite deposited on the glaciers of the Tibetan Plateau: New insights from Nd-Sr isotopic composition and size distribution. Journal of Geophysical Research: Atmospheres, 121(12): 7371-7382, DOI:10.1002/2016JD024944. Dong ZW, Qin DH, Kang SC, et al., 2016b. Individual particles of cryoconite deposited on the mountain glaciers of the Tibetan Plateau: Insights into chemical composition and sources. Atmospheric Environment, 138: 114-124, DOI:10.1016/j.atmosenv.2016.05.020. Dong ZW, Qin DH, Qing X, et al., 2017. Changes in precipitating snow chemistry with seasonality in the remote Laohugou glacier basin, western Qilian Mountains. Environmental Science and Pollution Research, 24(12): 11404-11414, DOI:10.1007/s11356-017-8778-y. Duan JP, Wang L, Ren JW, et al., 2009. Seasonal variations in heavy metals concentrations in Mt. Qomolangma Region snow. Journal of Geographical Sciences, 19(2): 249-256, DOI:10.1007/s11442-009-0249-z. Edwards R, Sedwick P, Morgan V, et al., 2006. Iron in ice cores from Law Dome: A record of atmospheric iron deposition for maritime East Antarctica during the Holocene and Last Glacial Maximum. Geochemistry, Geophysics, Geosystems, 7(12): Q12Q01, DOI:10.1029/2006GC001307. Eichler A, Tobler L, Eyrikh S, et al., 2012. Three centuries of Eastern European and Altai lead emissions recorded in a Belukha ice core. Environmental Science & Technology, 46(8): 4323-4330, DOI:10.1021/es2039954. Eichler A, Tobler L, Eyrikh S, et al., 2014. Ice-core based assessment of historical anthropogenic heavy metal (Cd, Cu, Sb, Zn) emissions in the Soviet Union. Environmental Science & Technology, 48(5): 2635-2642, DOI:10.1021/es404861n. Ferrat M, Weiss DJ, Strekopytov S, et al., 2011. Improved provenance tracing of Asian dust sources using rare earth elements and selected trace elements for palaeomonsoon studies on the eastern Tibetan Plateau. Geochimica et Cosmochimica Acta, 75(21): 6374-6399, DOI:10.1016/j.gca.2011.08.025. Gabrieli J, Carturan L, Gabrielli P, et al., 2011. Impact of Po Valley emissions on the highest glacier of the Eastern European Alps. Atmospheric Chemistry and Physics, 11(15): 8087-8102, DOI:10.5194/acp-11-8087-2011. Gabrielli P, Barbante C, Boutron C, et al., 2005. Variations in atmospheric trace elements in Dome C (East Antarctica) ice over the last two climatic cycles. Atmospheric Environment, 39(34): 6420-6429, DOI:10.1016/j.atmosenv.2005.07.025. Gabrielli P, Wegner A, Petit JR, et al., 2010. A major glacial-interglacial change in aeolian dust composition inferred from Rare Earth Elements in Antarctic ice. Quaternary Science Reviews, 29(1-2): 265-273, DOI:10.1016/j.quascirev.2009.09.002. Gaspari V, Barbante C, Cozzi G, et al., 2006. Atmospheric iron fluxes over the last deglaciation: Climatic implications. Geophysical Research Letters, 33(3): L03704, DOI:10.1029/2005GL024352. Grotti M, Soggia F, Ardini F, et al., 2011. Major and trace element partitioning between dissolved and particulate phases in Antarctic surface snow. Journal of Environmental Monitoring, 13(9): 2511-2520, DOI:10.1039/c1em10215j. He HL, Li B, Han LR, et al., 2002. Evaluation of determining 47 elements in geological samples by pressurized acid digestion ICP-MS. Chinese Journal of Analysis Laboratory, 21(5): 8-12, DOI:10.13595/j.cnki.issn1000-0720.2002.0132.(in Chinese) Hong SM, Soyol-Erdene TO, Hwang HJ, et al., 2012. Evidence of global-scale As, Mo, Sb, and Tl atmospheric pollution in the Antarctic snow. Environmental Science & Technology, 46(21): 11550-11557, DOI:10.1021/es303086c. Huang J, Kang SC, Zhang QG, et al., 2013. Atmospheric deposition of trace elements recorded in snow from the Mt. Nyainqentanglha region, southern Tibetan Plateau. Chemosphere, 92(8): 871-881, DOI:10.1016/j.chemosphere.2013.02.038. Kaspari S, Mayewski PA, Handley M, et al., 2009. Recent increases in atmospheric concentrations of Bi, U, Cs, S and Ca from a 350-year Mount Everest ice core record. Journal of Geophysical Research: Atmospheres, 114(D4): D04302, DOI:10.1029/2008JD011088. Koffman BG, Handley MJ, Osterberg EC, et al., 2014. Dependence of ice-core relative trace-element concentration on acidification. Journal of Glaciology, 60(219): 103-112, DOI:10.3189/2014JoG13J137. Lee K, Hur SD, Hou SG, et al., 2008. 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. Science of the Total Environment, 404(1): 171-181, DOI:10.1016/j.scitotenv.2008.06.022. Li CL, Kang SC, Zhang QG, 2009. Elemental composition of Tibetan Plateau top soils and its effect on evaluating atmospheric pollution transport. Environmental Pollution, 157(8-9): 2261-2265, DOI:10.1016/j.envpol.2009.03.035. Li CL, Bosch C, Kang SC, et al., 2016. Sources of black carbon to the Himalayan-Tibetan Plateau glaciers. Nature Communications, 7: 12574, DOI:10.1038/ncomms12574. Li YF, Yao TD, Wang NL, et al., 2006. Recent changes of atmospheric heavy metals in a high-elevation ice core from Muztagh Ata, east Pamirs: initial results. Annals of Glaciology, 43(1): 154-159, DOI:10.3189/172756406781812186. Li YF, Shi XL, Wang NL, et al., 2011. Concentration of trace elements and their sources in a snow pit from Yuzhu Peak, north-east Qinghai-Tibetan Plateau. Sciences in Cold and Arid Regions, 3(3): 216-222, DOI:10.3724/SP.J.1226.2011.00216. Liu YP, Hou SG, Hong SM, et al., 2011a. Atmospheric pollution indicated by trace elements in snow from the northern slope of Cho Oyu range, Himalayas. Environmental Earth Sciences, 63(2): 311-320, DOI:10.1007/s12665-010-0714-0. Liu YP, Hou SG, Hong SM, et al., 2011b. High-resolution trace element records of an ice core from the eastern Tien Shan, central Asia, since 1953 AD. Journal of Geophysical Research: Atmospheres, 116(D12): D12307, DOI:10.1029/2010JD015191. Planchon FAM, Boutron CF, Barbante C, et al., 2001. Ultrasensitive determination of heavy metals at the sub-picogram per gram level in ultraclean Antarctic snow samples by inductively coupled plasma sector field mass spectrometry. Analytica Chimica Acta, 450(1-2): 193-250, DOI:10.1016/S0003-2670(01)01379-4. Qi L, Hu J, Gregoire DC, 2000. Determination of trace elements in granites by inductively coupled plasma mass spectrometry. Talanta, 51(3): 507-513, DOI:10.1016/S0039-9140(99)00318-5. Rhodes RH, Baker JA, Millet MA, et al., 2011. Experimental investigation of the effects of mineral dust on the reproducibility and accuracy of ice core trace element analyses. Chemical Geology, 286(3-4): 207-221, DOI:10.1016/j.chemgeo.2011.05.006. Schwikowski M, Barbante C, Doering T, et al., 2004. Post-17th-century changes of European lead emissions recorded in high-altitude alpine snow and ice. Environmental Science & Technology, 38(4): 957-964, DOI:10.1021/es034715o. Taylor SR, McLennan SM, 1985. The Continental Crust: Its Composition and Evolution. Oxford: Blackwell, pp. 312. Thompson LG, Yao TD, Davis ME, et al., 1997. Tropical climate instability: the last glacial cycle from a Qinghai-Tibetan Ice Core. Science, 276(5320): 1821-1825, DOI:10.1126/science.276.5320.1821. Uglietti C, Gabrielli P, Olesik JW, et al., 2014. Large variability of trace element mass fractions determined by ICP-SFMS in ice core samples from worldwide high altitude glaciers. Applied Geochemistry, 47: 109-121, DOI:10.1016/j.apgeochem.2014.05.019. Wu GJ, Zhang CL, Zhang XL, et al., 2010. Sr and Nd isotopic composition of dust in Dunde ice core, Northern China: Implications for source tracing and use as an analogue of long-range transported Asian dust. Earth and Planetary Science Letters, 299(3-4): 409-416, DOI:10.1016/j.epsl.2010.09.021. Yao TD, Thompson LG, Mosbrugger V, et al., 2012a. Third Pole Environment (TPE). Environmental Development, 3: 52-64, DOI:10.1016/j.envdev.2012.04.002. Yao TD, Thompson L, Yang W, et al., 2012b. Different glacier status with atmospheric circulations in Tibetan Plateau and surroundings. Nature Climate Change, 2(9): 663-667, DOI:10.1038/nclimate1580. Yao TD, Masson-Delmotte V, Gao J, et al., 2013. A review of climatic controls on δ18O in precipitation over the Tibetan Plateau: Observations and simulations. Reviews of Geophysics, 51(4): 525-548, DOI:10.1002/rog.20023. Zhang YL, Kang SC, Chen PF, et al., 2016. Records of anthropogenic antimony in the glacial snow from the southeastern Tibetan Plateau. Journal of Asian Earth Sciences, 131: 62-71, DOI:10.1016/j.jseaes.2016.09.007. |
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