title: Assessment of native plant species for phytoremediation of heavy metals growing in the vicinity of NTPC sites, Kahalgaon, India.
abstract: The present investigation was carried out to screen native plants growing in fly ash (FA) contaminated areas near National Thermal Power Corporation (NTPC), Kahalgaon, Bihar, India with a view to using them for the eco-restoration of the area. A total number of 30 plant species (5 aquatic and 25 terrestrial including 6 ferns) were collected and their diversity status and dominance were also studied. After screening of dominant species at highly polluted site, 8 terrestrial and 5 aquatic plants were analyzed for heavy metals (Fe, Zn, Cu, Ni, Si, Al, Pb, Cr, and Cd). Differential accumulations of various heavy metals by different species of plants were observed. Typha latifolia was found to be most efficient metal accumulator of Fe (927), Cu (58), Zn (87), Ni (57), Al (67), Cd (95), and Pb (69), and Azolla pinnata as Cr (93) hyper-accumulator among aquatic species in µg g(-1). In terrestrial species the maximum levels of Fe (998), Zn (81), Ni (93), Al (121), and Si (156) were found in Croton bonplandium. However, there was high spatial variability in total metal accumulation in different species indicated by coefficient of variation (CV%). These results suggest that various aquatic, some dominant terrestrial plants including fern species may be used in a synergistic way to remediate and restore the FA contaminated wastelands.
authors.affiliation: a Biodiversity Division, CSIR-Institute of Himalayan Bioresource Technology , Palampur , Himachal Pradesh , India.
authors.forename: Alka
authors.initials: A
authors.lastname: Kumari
authors.affiliation: a Biodiversity Division, CSIR-Institute of Himalayan Bioresource Technology , Palampur , Himachal Pradesh , India.
authors.forename: Brij
authors.initials: B
authors.lastname: Lal
authors.affiliation: b Ecotoxicology and Bioremediation Division, CSIR-National Botanical Research Institute , Lucknow , Uttar Pradesh , India.
authors.forename: Upendra Nath
authors.initials: UN
authors.lastname: Rai
mesh_terms: D001673:Biodegradation, Environmental; D052918:Environmental Restoration and Remediation / Q000295:instrumentation / Q000379:methods*; D007194:India; D007220:Industrial Waste / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D010944:Plants / Q000737:chemistry / Q000145:classification / Q000378:metabolism*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D007220:Industrial Waste; D019216:Metals, Heavy; D012989:Soil Pollutants
keywords: aquatic plants; ferns; fly ash; phytoremediation; spontaneous plant species; terrestrial plants