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Investigating the ability of plant species of aquatic ecosystems to absorb heavy metals (Case Study: Meighan Wetland)
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Behrouz Kord   , Amin Khademi , Morteza Madanipour-Kermanshahi , Sara Pourabbasi |
| Islamic Azad University, Malayer Branch |
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Abstract: (33 Views) |
The presence of heavy metals in urban environments is considered one of the most significant environmental crises facing human societies today. These metals are persistent and durable environmental pollutants. Due to their non-biodegradability and their physiological effects on living organisms, they are significant even at very low concentrations. This research aimed to investigate the capacity of plant species to absorb heavy metals within the Meighan Wetland area. For this purpose, in summer 2024, samples were collected from plant species belonging to the astragal (Astragalus gossypinus Fischer.), wheat (Triticum aestivum L.), and cress (Lepidium sativum L.), at four randomly selected stations within the study area, based on vegetation density. At each station, a transect was chosen according to the prevailing wind direction. Sampling of leaves, stems, and roots of the plant species and soil was carried out in a completely randomized statistical design with three replications. The concentrations of lead (Pb), zinc (Zn), cadmium (Cd), copper (Cu), nickel (Ni), and aluminum (Al) in each sample of aerial tissue (leaves and stems) and subterranean tissue (roots) and soil were measured using a PerkinElmer Model 3030 atomic absorption spectrometer. The results indicated a significant difference in heavy metal concentrations in the soil of the studied stations at a 95% confidence level. Furthermore, the highest concentrations of heavy metals were observed in the aerial tissues (leaves and stems) of wheat and in the subterranean tissues (roots) of cress. The order of concentration was Aluminum > Zinc > Copper > Lead > Nickel > Cadmium. Among the studied plant species, wheat showed the highest transfer coefficient of Zn, Pb, Cu, Al, Ni and Cd (5.15, 4.91, 4.79, 4.72, 4.36 and 4.16 mg/kg dry matter) from roots to stems and leaves, and astragal and cress species ranking subsequently. |
Article number: 3 |
| Keywords: Meighan Wetland, Translocation Factor, Heavy Metals, Plant Species, Phytoremediation |
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Full-Text [PDF 751 kb]
(21 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2025/05/9 | Accepted: 2025/08/17 | Published: 2025/08/28
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