A statistical approach to the study of the distribution of trace elements and their organic/ inorganic affinity in lower Gondwana coals of India |
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| Institution: | 1. School of Energy Science and Engineering, Central South University, Changsha, China;2. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China;1. School of Earth, Atmosphere and the Environment, Monash University, Clayton, 3800, Victoria, Australia;2. CSIRO Mineral Resources, Clayton, Victoria 3168, Australia;3. Mineralogy, South Australian Museum, Adelaide 5000, South Australia, Australia;4. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China;5. School of Biological Sciences, The Sprigg Geobiology Centre, The University of Adelaide, South Australia 5005, Australia;6. Geology Department, University of Otago, Dunedin, New Zealand;7. Australian Synchrotron, Clayton, Vic. 3168, Australia;8. CSIRO Land and Water, PMB2, Glen Osmond, South Australia 5064, Australia;1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China;2. Far East Geological Institute, 159 Pr 100-let Vladivostoku, Vladivostok, Russia;3. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetny per. 35, Moscow 119017, Russia;4. Engineering School, Far Eastern Federal University, 8 Sukhanova Str, Vladivostok, Russia;5. School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia;6. University of Kentucky, Center for Applied Energy Research, 2540 Research Park Drive, Lexington, KY 40511, United States |
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| Abstract: | Trace-element analyses of seventy six coal samples representing all the major Lower Gondwana coal basins of India were carried out. Eighteen trace elements, viz., B, Ba, Co, Cr, Cu, Ga, Ge, La, Mn, Mo, Nb, Ni, Pb, Sn, Sr, V, Y and Zr were determined quantitatively in coal ash. An attempt was made to correlate the coals of different coalfields on the basis of multivariate analysis. In addition, the organic/inorganic affinities between the trace elements were established by the coefficients of correlation between the trace elements and ash present. A synthesis of the data reveals that there is similarity in the concentration ranges of trace elements among the coal seams of different coalfields, but the possibility of environmental differences exists due to the statistically different multivariate means of the trace-element concentrations.It is inferred that Ge, Cr, Y and La occur in these coals as organo-metallic complexes and chelates. The elements Ni, Co, Ga, V and Cu show both organic and inorganic association, whereas Mn and Ba are exclusively incorporated in the inorganic fractions. |
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