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
若尔盖高原牧场处于中国偏远洁净高海拔地区,大气沉降是污染物主要来源途径之一.由于季风的 影响,污染源的辨析较为困难.本文通过多点大气气溶胶不同季节同时采样方式,利用热电离固体同位素质 谱仪可有效校正质谱分析中同位素分馏效应的优点,对若尔盖地区土壤和大气气溶胶的铅同位素比值进行 精确分析,并结合季风特征对该地区污染物的来源进行解析.结果表明: 土壤的M8 Pb/2 04 Pb比值变化范围为 38.79059 ±0.00194 ~38.94461 ±0.00135,206 Pb/2 07Pb 为 1. 18551 ±0.00002 ~ 1 .19362 ±0.00002;大气气溶 胶的208 Pb...
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Published in | 岩矿测试 Vol. 36; no. 3; pp. 265 - 272 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
国家地质实验测试中心,国土资源部生态地球化学重点开放实验室,北京100037%中国科学院地球化学研究所,环境地球化学国家重点实验室,贵州贵阳550002%青岛大学环境科学与工程学院,山东青岛,266071
2017
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Subjects | |
Online Access | Get full text |
ISSN | 0254-5357 |
DOI | 10.15898/j.cnki.11-2131/td.201606220088 |
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Summary: | 若尔盖高原牧场处于中国偏远洁净高海拔地区,大气沉降是污染物主要来源途径之一.由于季风的 影响,污染源的辨析较为困难.本文通过多点大气气溶胶不同季节同时采样方式,利用热电离固体同位素质 谱仪可有效校正质谱分析中同位素分馏效应的优点,对若尔盖地区土壤和大气气溶胶的铅同位素比值进行 精确分析,并结合季风特征对该地区污染物的来源进行解析.结果表明: 土壤的M8 Pb/2 04 Pb比值变化范围为 38.79059 ±0.00194 ~38.94461 ±0.00135,206 Pb/2 07Pb 为 1. 18551 ±0.00002 ~ 1 .19362 ±0.00002;大气气溶 胶的208 Pb/2 0 4Pb 比值变化范围为 37. 49571 ±0.00117 ~38.48980 ±0.00105,2 06 Pb/2 0 7Pb 为 1.12894 ±0.00001 ~ 1.16734 ±0.00001.该地区土壤铅同位素的特征是放射成因铅高, 来自于自身天然存在的岩石矿物, 与大 气污染关系不大;大气气溶胶的铅同位素组成与土壤差异较大,显示为多元混合模式,受到了天然物质和人 类活动来源的混合影响, 机动车尾气及来自北部(兰州)和西北部(青海、 新疆、 哈萨克斯坦、 俄罗斯)的大气 远程运移是若尔盖大气气溶胶及污染物质的主要来源. |
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Bibliography: | 11-2131/TD GAI Nan1,ZHANG Peng2,TAN Ke-yan1,HUANG Yi1,ZHU Xiao-hua1,YIN Xiao-cai3 ,YANG Yong-liangh(1. Key Laboratory of Eco-geochemistry, Ministry of Land and Resources, National Research Center for Geoanalysis,Beijing 100037, China;2. The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy ofSciences,Guiyang 550002, China ;3. College of Environmental Sciences and Engineering, Qingdao University, Qingdao 266071 , China) Ruoergai; atmospheric aerosols; Pb isotope ratio; Thermal Ionization Mass Spectrometry; monsoon characteristics; pollution source 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 us |
ISSN: | 0254-5357 |
DOI: | 10.15898/j.cnki.11-2131/td.201606220088 |