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<p>The present study was conducted in a lab-scale constructed wetland to investigate the extraction potential of <i>Typha latifolia</i> and <i>Lemna minor</i> for heavy metals (HMs) from tannery wastewater (TWW), supplemented with citric acid (CA) as a chelator. After 6 weeks of treatment, harvesting was followed by a recording of agronomical trait data. The data indicated a significant (<i>p</i> &lt; 0.05) decline in the morpho-physiological and biochemical attributes of the plants, which correlated increase in TWW concentration. Maximum accumulation of selected HMs including chromium (Cr), cadmium (Cd), and lead (Pb), in <i>L. minor</i> was observed at 100% TWW, with respective values of 148.4%, 129.4%, and 85.6% as compared to 25% TWW. In <i>T. latifolia</i>, a significant increase in Cr (143.8%), Cd (148.3%), and Pb (126.8%) in the roots was also observed at 100% TWW as compared to 25% TWW. CA amendment under TWW conditions significantly enhanced Cr uptake in <i>L. minor</i> by 61% and accumulation by 94%. Similarly, in the roots of <i>T. latifolia</i>, Cr uptake was elevated by up to 11%, with accumulation increasing by 117%. These findings indicate that phytoextraction of heavy metals can serve as an efficient strategy for the remediation of tannery wastewater using <i>Lemna minor</i> and <i>Typha latifolia</i> in constructed wetlands.</p> Graphical Abstract <p></p>

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Monitoring and optimization of heavy metal phytoextraction in constructed wetlands amended with organic chelators

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Mujahid Farid,
  • Ambreen Mussarat,
  • Muhammad Zubair,
  • Zaki ul Zaman Asam,
  • Ayesha Siddiqua,
  • Wajiha Sarfraz,
  • Roha Murtaza,
  • Suliman Mohammed Suliman Alghanem,
  • Haifa Abdul Aziz Sakit Alhaithloul

摘要

The present study was conducted in a lab-scale constructed wetland to investigate the extraction potential of Typha latifolia and Lemna minor for heavy metals (HMs) from tannery wastewater (TWW), supplemented with citric acid (CA) as a chelator. After 6 weeks of treatment, harvesting was followed by a recording of agronomical trait data. The data indicated a significant (p < 0.05) decline in the morpho-physiological and biochemical attributes of the plants, which correlated increase in TWW concentration. Maximum accumulation of selected HMs including chromium (Cr), cadmium (Cd), and lead (Pb), in L. minor was observed at 100% TWW, with respective values of 148.4%, 129.4%, and 85.6% as compared to 25% TWW. In T. latifolia, a significant increase in Cr (143.8%), Cd (148.3%), and Pb (126.8%) in the roots was also observed at 100% TWW as compared to 25% TWW. CA amendment under TWW conditions significantly enhanced Cr uptake in L. minor by 61% and accumulation by 94%. Similarly, in the roots of T. latifolia, Cr uptake was elevated by up to 11%, with accumulation increasing by 117%. These findings indicate that phytoextraction of heavy metals can serve as an efficient strategy for the remediation of tannery wastewater using Lemna minor and Typha latifolia in constructed wetlands.

Graphical Abstract