Pandey, Bhanu (2025) Identification of metal-tolerant herbaceous species for phytostabilization and ecological restoration of fly ash dumpsites. Physiology and Molecular Biology of Plants.

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Abstract

The global deposition of fly ash (FA) from industrial processes is a growing environmental concern due to its detrimental effects on ecosystems. Sustainable strategies such as phytomanagement offer viable solutions for restoring abandoned FA dump sites. The study assessed soil quality, herbaceous diversity, and heavy metal accumulation in species growing in FA dump of Bokaro Thermal Power Station and adjacent forest sites (FS). Soil analysis of the FA dump site revealed elevated heavy metal concentrations, including Mn (272.42 ± 11.27 mg/kg), Zn (86.92 ± 1.67 mg/kg), Ni (70.82 ± 1.53 mg/kg), Cr (57.31 ± 1.75 mg/kg), Pb (46.85 ± 1.34 mg/kg), Co (37.93 ± 1.19 mg/kg), Cu (20.49 ± 0.48 mg/kg), and Cd (1.54 ± 0.05 mg/kg), along with slight alkalinity and nutrient deficiencies. The herbaceous community was dominated by species from Poaceae and Asteraceae families with 37.8% classified as highly metal-tolerant based on Metal Tolerance Index. Species such as Cynodon dactylon, Saccharum spontaneum, and Alternanthera sessilis exhibited high importance value index and bioconcentration factors (BCF > 1) for Cr, Zn, and Pb. These species effectively stabilized metals, making them suitable for phytostabilization. PCA analysis indicated that pH, WHC, TOC, and BD significantly influenced plant metal uptake, while nutrients (N, P, K) contributed to metal immobilization. CCA analysis demonstrated that soil parameters and heavy metal availability governed herbaceous species distribution, making them potential indicators of contamination. This study highlights the potential of metal-tolerant herbaceous species for reclaiming FA dumps by improving soil quality and reducing metal mobility, contributing to sustainable land restoration.

Item Type:	Article
Subjects:	Envieronmental Management Group
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	15 Sep 2025 10:02
Last Modified:	15 Sep 2025 10:02
URI:	http://cimfr.csircentral.net/id/eprint/2882

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