A 200 Year Record of Atmospheric Cobalt, Chromium, Molybdenum, and Antimony in High Altitude Alpine Firn and Ice

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• 作者：Katja Van de Velde ; Christophe Ferrari ; Carlo Barbante ; Ivo Moret ; Tania Bellomi ; Sungmin Hong ; and Claude Boutron
• 刊名：Environmental Science & Technology
• 出版年：1999
• 出版时间：October 15, 1999
• 年：1999
• 卷：33
• 期：20
• 页码：3495 - 3501
• 全文大小：100K
• 年卷期：v.33,no.20(October 15, 1999)
• ISSN：1520-5851

文摘

High altitude cold snow and ice cores from midlatitudemountain ranges have been used very little to obtain historicalrecords of environmental contamination by heavy metals.Co, Cr, Mo, and Sb have been measured by DF-ICP-MS-MCN (double focusing inductively coupled plasma massspectrometry with microconcentric nebulizer) in varioussections of a 140 m snow/ice core drilled at a high altitudelocation near the summit of Mont Blanc in the French-Italian Alps. The bottom of the core is older than 200 years.It gives the first snow and ice time series for thesemetals of high environmental interest for the post IndustrialRevolution period. Measured concentrations range from26 to 433 pg/g for Co, from 8 to 469 pg/g for Cr, from 0.2 to50 pg/g for Mo, and from 0.2 to 109 pg/g for Sb. For allfour metals, concentrations in recent snow are found tobe, on the average, significantly higher than concentrationsin ice dated from before the middle of the 19th century.There are however differences in the timing and the amplitudeof the observed increases from one metal to another.Mo shows the greatest increase (×16), followed by Sb(×5), and Co and Cr (×2-3). Contribution from natural sourcesis, on the average, limited except for Mo in ice datedfrom before the middle of the 19th century. For recent snow,contribution from oil and coal combustion is the dominatingsource for Co, Mo, and Sb. For Cr, on the other hand,the most important contribution is from iron, steel, and ferro-alloy industries.