Abstract
Most power stations currently operate wet ash disposal systems. However, this method of ash disposal is being subjected to increasing scrutiny as there is a potential for contamination of surface and groundwaters by trace elements leached from the ash (Carlson and Adriano, 1993). Very high liquid to solid ratios of 10:1 to 20:1 are typically used in ash sluicing systems (Chu et al., 1978). Consequently, large volumes of water containing elements dissolved from the ash are produced. The composition of the water in an ash pond will be determined by the ash itself, by the quality of water used for sluicing, and by the relationship of the ash pond to other components of the power station water circuit (Figure 12.1).
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Jones, D.R. (1995). The Leaching of Major and Trace Elements from Coal Ash. In: Swaine, D.J., Goodarzi, F. (eds) Environmental Aspects of Trace Elements in Coal. Energy & Environment, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8496-8_12
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