岩矿测试2017，Vol.36Issue(3)：265-272,8.DOI:10.15898/j.cnki.11-2131/td.201606220088
若尔盖高原土壤和近地表大气气溶胶铅同位素组成测试及示踪研究
Studies on Lead Isotope Analysis and Composition in Soils and Near-surface Atmospheric Aerosols of the Ruoergai High Altitude Plateau, and Lead Sources Identification
摘要
Abstract
The Ruoergai highland pasture is located in the remote,high altitude area of China.Atmospheric transport and precipitation is one of the major routes of pollutants to this area,but pollution source identification is difficult due to the monsoon.Atmospheric aerosol samples were taken in different seasons at multiple sites in Ruoergai.High precision Pb isotope analysis for soils and atmospheric aerosols was performed by using Thermal Ionization Mass Spectrometry (TIMS),which has the advantage of effectively removing the isotope fractionation effect in mass analysis.The sources of the aerosols were analyzed in association with the characteristics of the monsoon.The range of 208pb/204 Pb ratio is 38.79059 ± 0.00194-38.94461 ± 0.00135 and 206pb/207 Pb 1.18551 ±0.00002-1.19362 ±0.00002,208 pb/204 Pb in the atmospheric aerosol is 37.49571 ± 0.00117-38.48980 0.00105 and 206pb/207pb 1.12894 ± 0.00001-1.16734 ± 0.00001.The Pb isotopic composition of soil in Ruoergai is characterized by high radiogenic Pb,mainly from local rock and minerals.The Pb isotopic composition of aerosols differs from that of soil,showing a multiple mode of mixing of natural and anthropogenic sources.Automobile exhaust gas and long-range atmospheric transport mainly from the north (Lanzou) and northwest (Qinghai,Xinjiang,Kazakhstan and Russia) are possible sources of aerosols and pollutants.关键词
若尔盖/大气气溶胶/铅同位素比值/热电离固体同位素质谱法/季风特征/污染源Key words
Ruoergai/atmospheric aerosols/Pb isotope ratio/Thermal Ionization Mass Spectrometry/monsoon characteristics/pollution source分类
化学化工引用本文复制引用
盖楠,张鹏,谭科艳,黄毅,朱晓华,殷效彩,杨永亮..若尔盖高原土壤和近地表大气气溶胶铅同位素组成测试及示踪研究[J].岩矿测试,2017,36(3):265-272,8.基金项目
国家自然科学基金资助项目(41003044,41673022) （41003044,41673022）
