Leachate from land disposal of coal fly ash |
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| Institution: | 1. School of Mines, China University of Mining and Technology, Xuzhou 221116, China;2. Key Laboratory of Deep Coal Resource Mining, China University of Mining and Technology, Xuzhou 221116, China;3. Department of Civil and Environmental Engineering, University of Hawaii at Manoa, 96822 Hawaii, USA;1. University of Oulu, Fiber and Particle Engineering, P.O. Box 4300, FIN-90014 University of Oulu, Oulu, Finland;2. Faculty of Materials Science and Ceramics/Wimic, AGH University of Science and Technology, 30-059 Krakow, Poland;3. Dept. Civil Engineering/CICECO, University of Aveiro, 3810-193, Aveiro, Portugal |
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| Abstract: | The results of large-scale lysimeter tests in which two pulverized coal fly ashes (PCFA) have been exposed to natural weather conditions for up to seven years are presented and compared with those of laboratory leaching tests. Laboratory column leaching tests on PCFA show good reproducibility, and comparisons between lysimeter and laboratory leaching results are promising for several salt ions and trace elements in the leachate when expressed in terms of the leachate to solids ratio (L/S). A long-term disposal strategy which takes into account the largely insoluble nature of PCFA is suggested. |
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