Metal remediation potential of naturally occurring plants growing on barren fly ash dumps.
Environ Geochem Health
; 43(4): 1415-1426, 2021 Apr.
Article
em En
| MEDLINE
| ID: mdl-32737634
ABSTRACT
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.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Plantas
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Biodegradação Ambiental
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Poluentes Ambientais
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Cinza de Carvão
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Metais
País/Região como assunto:
Asia
Idioma:
En
Revista:
Environ Geochem Health
Assunto da revista:
QUIMICA
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SAUDE AMBIENTAL
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Índia