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Review on Phytoremediation Potential of Floating Aquatic Plants for Heavy Metals: A Promising Approach

Author

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  • Yean Ling Pang

    (Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang 43000, Malaysia
    Centre for Photonics and Advanced Materials Research, Universiti Tunku Abdul Rahman, Kajang 43000, Malaysia)

  • Yen Ying Quek

    (Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang 43000, Malaysia)

  • Steven Lim

    (Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang 43000, Malaysia
    Centre for Photonics and Advanced Materials Research, Universiti Tunku Abdul Rahman, Kajang 43000, Malaysia)

  • Siew Hoong Shuit

    (Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Kajang 43000, Malaysia
    Centre for Photonics and Advanced Materials Research, Universiti Tunku Abdul Rahman, Kajang 43000, Malaysia)

Abstract

Water pollution due to heavy metals has become a serious environmental concern due to their hazardous properties. Since conventional water remediation techniques are generally ineffective and non-environmentally friendly, phytoremediation has gained increasing attention from worldwide researchers and scientists due to its cost-effectiveness and environmental friendliness. Hence, this review first discussed soil and water remediations. Phytoremediation can be divided into five techniques to remove heavy metals from the polluted environment, namely, phytostabilization (phytosequestration), phytodegradation (phytotransformation), phytofiltration (rhizofiltration), phytoextraction (phytoaccumulation), and phytovolatilization. Four common floating aquatic plants (accumulator plants), such as duckweed ( Lemna minor ), water lettuce ( Pistia stratiotes ), water hyacinth ( Eichhornia crassipes ), and watermoss ( Salvinia ) were discussed in detail due to their great capability in absorbing the metal ions by their roots and further translocating the metal ions to the aerial parts. Furthermore, the parameter studies, such as optimum pH and temperature of the water, exposure duration, initial metal concentration, water salinity, and the addition of chelating agents, were evaluated. The absorption kinetics of the plants was discussed in detail. In short, phytoremediation is a promising green and sustainable water remediation approach. However, further research is necessary to enhance its practicability and performance at large-scale implementation.

Suggested Citation

  • Yean Ling Pang & Yen Ying Quek & Steven Lim & Siew Hoong Shuit, 2023. "Review on Phytoremediation Potential of Floating Aquatic Plants for Heavy Metals: A Promising Approach," Sustainability, MDPI, vol. 15(2), pages 1-23, January.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:2:p:1290-:d:1030710
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    References listed on IDEAS

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    1. Shafaqat Ali & Zohaib Abbas & Muhammad Rizwan & Ihsan Elahi Zaheer & İlkay Yavaş & Aydın Ünay & Mohamed M. Abdel-DAIM & May Bin-Jumah & Mirza Hasanuzzaman & Dimitris Kalderis, 2020. "Application of Floating Aquatic Plants in Phytoremediation of Heavy Metals Polluted Water: A Review," Sustainability, MDPI, vol. 12(5), pages 1-33, March.
    2. Hossain Md Anawar & Rezaul Chowdhury, 2020. "Remediation of Polluted River Water by Biological, Chemical, Ecological and Engineering Processes," Sustainability, MDPI, vol. 12(17), pages 1-18, August.
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