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Authors
Affiliations
1 Department of Environmental Science and Engineering, Centre of Mining Environment, Indian School of Mines, Dhanbad 826004, Jharkhand, IN
Source
Nature Environment and Pollution Technology, Vol 16, No 2 (2017), Pagination: 363-374
Abstract
Generation of fly ash (FA) occurs in huge amounts during the combustion of coal for energy production and is recognized as a serious environmental pollutant. Fly ash management is a major concern of the century. Disposal of FA by various conventional methods leads to degradation of arable land and contamination of the groundwater. Attention is now being paid to the recycling of FA through biological methods. FA has availability of plant nutrients and it also contains some toxic heavy metals. Remediation of metals from FA and an increase in its NPK content enhances its applications in agricultural sector. Vermitechnology is one of the promising options for improving the nutrient status of FA and also reducing the metal content. Biologically modified form of fly ash is used for its chemical composition for agricultural purposes or upgrading the wastelands. An exhaustive review of several studies was done in this paper, which, systematically covers the importance, scope and benefits of remediating the fly ash using different species of earthworms. Changes in the content of N, P and K along with the reduction of metal content in the substrates were observed as per the literature survey thus proving vermiremediation, a sustainable technique.
Keywords
Fly Ash, Heavy Metals, Agriculture, Earthworms, Bioaccumulation, Vermicomposting.
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