Studies on Lead Isotope Analysis and Composition in Soils and Near-surface Atmospheric Aerosols of the Ruoergai High Altitude Plateau, and Lead Sources Identification

Nan GAI; Peng ZHANG; Ke-yan TAN; Yi HUANG; Xiao-hua ZHU; Xiao-cai YIN; Yong-liang YANG

doi:10.15898/j.cnki.11-2131/td.201606220088

Rock and Mineral Analysis > 2017 > 36(3): 265-272. > DOI: 10.15898/j.cnki.11-2131/td.201606220088

Nan GAI, Peng ZHANG, Ke-yan TAN, Yi HUANG, Xiao-hua ZHU, Xiao-cai YIN, Yong-liang YANG. Studies on Lead Isotope Analysis and Composition in Soils and Near-surface Atmospheric Aerosols of the Ruoergai High Altitude Plateau, and Lead Sources Identification[J]. Rock and Mineral Analysis, 2017, 36(3): 265-272. DOI: 10.15898/j.cnki.11-2131/td.201606220088

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Studies on Lead Isotope Analysis and Composition in Soils and Near-surface Atmospheric Aerosols of the Ruoergai High Altitude Plateau, and Lead Sources Identification

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 of Sciences, Guiyang 550002, China
3.
College of Environmental Sciences and Engineering, Qingdao University, Qingdao 266071, China

More Information

Received Date: June 21, 2016
Revised Date: April 25, 2017
Accepted Date: May 27, 2017
Published Date: May 31, 2017

Abstract

Highlights
· The atmospheric aerosol were monitored in Ruoergai, Lanzhou and Chengdu simultaneously. Combined with lead isotopic composition and monsoon, the sources of atmospheric aerosol pollution were analyzed.

· Sources discrimination of lead isotope in soil and atmospheric aerosol was performed under monsoon influence.

· Atmospheric aerosols in Ruoergai are affected by natural and human activities.

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/²⁰⁴Pb ratio is 38.79059±0.00194-38.94461±0.00135 and ²⁰⁶Pb/²⁰⁷Pb 1.18551±0.00002-1.19362±0.00002, ²⁰⁸Pb/²⁰⁴Pb in the atmo-spheric 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.
- Ruoergai,
- atmospheric aerosols,
- Pb isotope ratio,
- Thermal Ionization Mass Spectrometry,
- monsoon characteristics,
- pollution source

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