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Identification of Aquatic Plant Species that Absorb Heavy Metals in Aquatic Ecosystems
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Saeed Souri *   |
| Tehran University of Medical Sciences |
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Abstract: (459 Views) |
Background and Aim: Heavy metals are harmful to human health. Aquatic plants can store large amounts of these heavy metals, and play an important role in the purification of these pollutants in aquatic ecosystems. The aim of this study was to identify the aquatic plant species that absorb and purify heavy metals in the aquatic ecosystems of Anzali wetland, north of Iran.
Methods: Sampling of aquatic plants and sediments of Anzali wetland, north of Iran, was done randomly based on vegetation density in 10 stations in July 2019. Species were identified and registered. Then leaf, stem and root limbs were isolated and then digested samples were prepared. Atomic absorption spectrometry was used to analyze the heavy metals in these samples.
Results: Among the plant families studied in Anzali Wetland, families of aquatic plants such as Poaceae or Gramineae, Cyperaceae, Potamogetonaceae, Hydrocharitaceae, Lemnaceae, Labiatae had the highest number of species in the absorption of heavy metals. Species that used the three parts of root, stem and leaf simultaneously to absorb heavy metals was the highest frequency of 96%, species that used only roots had 22%, roots and leaves had 69%, and roots and buds had 3%. Among the metals absorbed by different plant species, zinc with 13.97%, lead with 13.44%, and cadmium with 12.9% had a high frequency and metals such as copper, nickel and iron were in the next category.
Conclusion: In the present study, the genus Poaceae had the highest abundance of species and the roots had a greater share than the stem and leaves as the organ that absorbs heavy metals. Among heavy metals, zinc had the highest frequency of uptake by aquatic plants.
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| Keywords: Aquatic plants, Heavy metals, Phytoremediation |
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Full-Text [PDF 923 kb]
(372 Downloads)
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Type of Study: Original Article |
Subject:
Marine Medicine
Received: 2023/12/20 | Accepted: 2019/11/1 | Published: 2019/11/1
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