Contents and Occurrence of Cadmium in the Coals from Guizhou Province, China
Eleven raw coal samples were collected from Liuzhi, Suicheng, Zunyi, Xingren, Xingyi, and Anlong districts in Guizhou Province, Southwest China. The content of cadmium (Cd) in coal was determined using inductively coupled plasma mass–spectrometry (ICP‐MS). Cd contents ranged from 0.146 to 2.74 ppm (...
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Published in | Annals of the New York Academy of Sciences Vol. 1140; no. 1; pp. 274 - 281 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Malden, USA
Blackwell Publishing Inc
01.10.2008
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Subjects | |
Online Access | Get full text |
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Summary: | Eleven raw coal samples were collected from Liuzhi, Suicheng, Zunyi, Xingren, Xingyi, and Anlong districts in Guizhou Province, Southwest China. The content of cadmium (Cd) in coal was determined using inductively coupled plasma mass–spectrometry (ICP‐MS). Cd contents ranged from 0.146 to 2.74 ppm (whole coal basis), with an average of 1.09 ppm. In comparison with the arithmetic means of Cd in Chinese coal (0.25 ppm), this is much higher. In order to find its occurrence in coal, float–sink analysis and a coal flotation test by progressive release were conducted on two raw coal samples. The content of the Cd and ash yield of the flotation products were determined. The organic matter was removed by low‐temperature ashing (LTA). X‐ray diffraction (XRD) was used to differentiate the main, minor, and trace minerals in the LTA from different flotation subproducts. Quartz, kaolinite, pyrite, and calcite were found to dominate the mineral matters, with a proportion of anatase, muscovite, and illite. Then quantitative analysis of minerals in LTA was conducted using material analysis using diffraction (MAUD) based on the Rietveld refinement method. Results show that Cd has a strong association with kaolinite. |
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Bibliography: | ArticleID:NYAS1140009 ark:/67375/WNG-NSDXT180-F istex:D02290E294A8CC18AEA02DAF4137966A1A6BB85C |
ISSN: | 0077-8923 1749-6632 |
DOI: | 10.1196/annals.1454.009 |