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Metal remediation potential of naturally occurring plants growing on barren fly ash dumps
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|Authors:||Maiti, Deblina; Pandey, Vimal Chandra|
|Author Affiliations:||Primary: |
CSIR-Central Institute of Mining and Fuel Research, Dhanbad, Jharkhand, India
Babasaheb Bhimrao Ambedkar University, Department of Environmental Science, Lucknow, Uttar Pradesh, India
|Volume Title:||Special Issue: Metallophytes for soil remediation|
|Source:||Special Issue: Metallophytes for soil remediation. Environmental Geochemistry and Health, 43(4), p.1415-1426. Publisher: Springer, London, United Kingdom. ISSN: 0269-4042|
|Summary:||The present study aimed to elucidate the remediation potential of visibly dominant, naturally growing plants obtained from an early colonized fly ash dump near a coal-based thermal power station. The vegetation comprised of grasses like Saccharum spontaneum L., Cynodon dactylon (L.) Pers., herbs such as Tephrosia purpurea (L.) Pers., Sida rhombifolia L., Dysphania ambrosioides (L.) Mosyakin & Clemants, Chromolaena odorata (L.) King & H.E. Robins along with tree saplings Butea monosperma (Lam.) Taub. The growth of the vegetation improved the N and P content of the ash. Average metal concentrations (mg kg-1) in the ash samples and plants were in order Mn (345.1) > Zn (63.7) > Ni (29.3) > Cu (16.8) > Cr (9.9) > Pb (1.7) > Cd (0.41) and Cr (58.58) > Zn (52.74) > Mn (39.09) > Cu (10.71) > Ni (7.45) > Pb (5.52) > Cd (0.14), respectively. The plants showed fly ash dump phytostabilization potential and accumulated Cr (80.19-178.11 mg kg-1) above maximum allowable concentrations for plant tissues. Positive correlations were also obtained for metal concentration in plant roots versus fly ash. Saccharum spontaneum showed highest biomass and is the most efficient plant which can be used for the restoration of ash dumps.|
|Copyright Information:||GeoRef, Copyright 2022 American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany|
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