Abstract
In India, about 75% of the electricity is generated from coal-based thermal power plants and they produce approximately 210 million tons of fly ash (FA). High ash content of Indian coal (30%–40%) produces large volumes of FA of which 68% has been successfully utilized in various activities. FA is stored in the earthen FA lagoons (embankment), where colonization of vegetation (grasses, herbs, and shrubs) is very common. This vegetation is established as a process of ecological succession and many toxic metals are bioaccumulated and transferred to aerial parts. During phytoremediation of FA, these naturally grown plant species can be used. In this chapter two field studies on bioaccumulation of metals in naturally colonizing vegetation are discussed, while one case study on bioaccumulation of metals in FA-filled coal mine opencast voids blanketed with topsoil is also discussed.
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