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THE APPLICATION OF ELEMENT AND LEAD ISOTOPE TRACING TO THALLIUM CONTAMINATION IN SOIL OF THE YUNFU PYRITE MINE |
LIU Jing-yong1,2,3, CHANG Xiang-yang1,2, TU Xiang-lin1 |
1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
2. School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China;
3. Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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Abstract The environmental pollutant has the same lead isotope composition as its source, and hence we can determine the accurate contaminative source through the study of lead isotope composition. In recent years lead isotope tracing has been playing its unique role in studying the source and migration of heavy metals in soil. As Tl and Pb have similar geochemical characteristics, the distribution and migration of Tl in the surface soil of the Yunfu pyrite mine have good correlation with Pb. In this study, therefore, the element and lead isotope tracing was used to study the migration of thallium in soil. Element and lead isotope tracing shows that thallium pollutants are mainly accumulated in top soil of about 0-16.5 cm, and that the soil is subjected less pollution in deeper soil. The soil around the slags at the depth of some 44 cm is affected by Tl leaching from the slags.
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Received: 11 November 2005
Published: 24 August 2006
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