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<p>The present study examines the phytoremediation potential of the <i>Nepeta hindostana</i> H. ex Roth plant which was found growing dominantly in some industrial waste dumps of unknown origin in an industrial Indian city. Concentrations (total metal in µg/g) of Pb, Ni, Zn, and Cd in waste soil samples ranged from 209.7 to 312.2 (mean 231.58 ± 11.94), 70.1 to 91.4 (mean 85.01 ± 2.10), 18.2 to 23.9 (mean 20.82 ± 0.47), and 36.6 to 58.1 (mean 45.64 ± 1.65), while those in <i>N. hindostana</i> collected from the same locations ranged from 153.2 to 250.7, 75.5 to 96.20, ND to 14.9, and 37.2 to 65.1&#xa0;µg/g, respectively. Various significant indexes were estimated to understand the potential of <i>N. hindostana</i> for extraction and accumulation of studied metals. This plant accumulated (BAF) and extracted (EC<sub>f</sub>) a high amount of Cd (Cd &gt; Ni &gt; Pb) from the site among all metals analyzed while translocating (TF) more Ni (Ni &gt; Cd &gt; Pb) to the above-ground part. No significant correlation was observed among all soil metals analyzed at the site indicating varied metal contamination sources. However, concentrations of each metal (except Zn) in roots and shoots of <i>N. hindostana</i> were significantly correlated (<i>r</i> = 0.79–0.95, <i>p</i> &lt; 0.05). The plant showed no visual toxicity symptoms and demonstrated exceptional potential for bio-accumulation and translocation of Cd and Ni, and phytostabilization of Pb. This study has significant implications for the potential use of <i>N. hindostana</i> in the bio-removal of heavy metals from contaminated areas, making it a promising tool for phytoremediation efforts.</p>

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Nepeta hindostana H. ex Roth: A Promising Plant for Bio-removal of Heavy Metals from Contaminated Soils

  • 期刊论文

  • 发表日期：

    2025年2月6日

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  • Ashutosh Tripathi-II,
  • Dharmnath Prajapati,
  • Ashutosh Tripathi-I

摘要

The present study examines the phytoremediation potential of the Nepeta hindostana H. ex Roth plant which was found growing dominantly in some industrial waste dumps of unknown origin in an industrial Indian city. Concentrations (total metal in µg/g) of Pb, Ni, Zn, and Cd in waste soil samples ranged from 209.7 to 312.2 (mean 231.58 ± 11.94), 70.1 to 91.4 (mean 85.01 ± 2.10), 18.2 to 23.9 (mean 20.82 ± 0.47), and 36.6 to 58.1 (mean 45.64 ± 1.65), while those in N. hindostana collected from the same locations ranged from 153.2 to 250.7, 75.5 to 96.20, ND to 14.9, and 37.2 to 65.1 µg/g, respectively. Various significant indexes were estimated to understand the potential of N. hindostana for extraction and accumulation of studied metals. This plant accumulated (BAF) and extracted (ECf) a high amount of Cd (Cd > Ni > Pb) from the site among all metals analyzed while translocating (TF) more Ni (Ni > Cd > Pb) to the above-ground part. No significant correlation was observed among all soil metals analyzed at the site indicating varied metal contamination sources. However, concentrations of each metal (except Zn) in roots and shoots of N. hindostana were significantly correlated (r = 0.79–0.95, p < 0.05). The plant showed no visual toxicity symptoms and demonstrated exceptional potential for bio-accumulation and translocation of Cd and Ni, and phytostabilization of Pb. This study has significant implications for the potential use of N. hindostana in the bio-removal of heavy metals from contaminated areas, making it a promising tool for phytoremediation efforts.