Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular Economy
The use of living <i>Arthrospira platensis</i> (<i>A. platensis</i>) cultures emerges as a promising green solution for the bioremediation of water contaminated by toxic metal waste. The scope of the present study is to evaluate the microalga’s potential in heavy metal remedi...
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2025-01-01
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| author | Lamprini Malletzidou Eleni Kyratzopoulou Nikoletta Kyzaki Evangelos Nerantzis Nikolaos A. Kazakis |
| author_facet | Lamprini Malletzidou Eleni Kyratzopoulou Nikoletta Kyzaki Evangelos Nerantzis Nikolaos A. Kazakis |
| author_sort | Lamprini Malletzidou |
| collection | DOAJ |
| description | The use of living <i>Arthrospira platensis</i> (<i>A. platensis</i>) cultures emerges as a promising green solution for the bioremediation of water contaminated by toxic metal waste. The scope of the present study is to evaluate the microalga’s potential in heavy metal remediation, in the case of multi-metal-treated (multi-MT) systems. For this reason, <i>A. platensis</i> cultures were exposed to mono- and multi-metal solutions of Cu, Cd, Ni, Pb, and Zn, and their metal adsorption ability was investigated. The heavy metal removal efficiency of <i>A. platensis</i> cultures was evaluated using atomic absorption spectroscopy (AAS). Additionally, the cultures were examined using Fourier transform infrared (FTIR) spectroscopy, Near-Infrared (NIR) Spectroscopy, UV-Vis spectrophotometry, and optical microscopy, together with pH and electrical conductivity (EC) measurements to evaluate the quality of the cultures and the changes induced by heavy metal stress. The results showed that metal removal is still efficient in multi-MT cultures. In particular, Cu, Cd, Pb, and Zn removal of multi-MT cultures is elevated or relative to the respective removal of the mono-metal-treated (mono-MT) cultures, showing a synergistic or cooperative interaction between the metals, while the removal of Ni of multi-MT cultures decreased compared to Ni of mono-MT cultures, showing an antagonistic interaction to the other metals. The study shows that <i>A. platensis</i> is considered an effective microalga toward the bioremediation of multi-metal polluted cultures. |
| format | Article |
| id | doaj-art-5480a157958e4805a7ea722fb613675d |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-5480a157958e4805a7ea722fb613675d2025-01-24T13:20:50ZengMDPI AGApplied Sciences2076-34172025-01-0115279110.3390/app15020791Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular EconomyLamprini Malletzidou0Eleni Kyratzopoulou1Nikoletta Kyzaki2Evangelos Nerantzis3Nikolaos A. Kazakis4Laboratory of Archaeometry and Physicochemical Measurements, Athena—Research and Innovation Center in Information, Communication and Knowledge Technologies, Kimmeria University Campus, P.O. Box 159, GR-67100 Xanthi, GreeceLaboratory of Archaeometry and Physicochemical Measurements, Athena—Research and Innovation Center in Information, Communication and Knowledge Technologies, Kimmeria University Campus, P.O. Box 159, GR-67100 Xanthi, GreeceLaboratory of Archaeometry and Physicochemical Measurements, Athena—Research and Innovation Center in Information, Communication and Knowledge Technologies, Kimmeria University Campus, P.O. Box 159, GR-67100 Xanthi, GreeceLaboratory of Archaeometry and Physicochemical Measurements, Athena—Research and Innovation Center in Information, Communication and Knowledge Technologies, Kimmeria University Campus, P.O. Box 159, GR-67100 Xanthi, GreeceLaboratory of Archaeometry and Physicochemical Measurements, Athena—Research and Innovation Center in Information, Communication and Knowledge Technologies, Kimmeria University Campus, P.O. Box 159, GR-67100 Xanthi, GreeceThe use of living <i>Arthrospira platensis</i> (<i>A. platensis</i>) cultures emerges as a promising green solution for the bioremediation of water contaminated by toxic metal waste. The scope of the present study is to evaluate the microalga’s potential in heavy metal remediation, in the case of multi-metal-treated (multi-MT) systems. For this reason, <i>A. platensis</i> cultures were exposed to mono- and multi-metal solutions of Cu, Cd, Ni, Pb, and Zn, and their metal adsorption ability was investigated. The heavy metal removal efficiency of <i>A. platensis</i> cultures was evaluated using atomic absorption spectroscopy (AAS). Additionally, the cultures were examined using Fourier transform infrared (FTIR) spectroscopy, Near-Infrared (NIR) Spectroscopy, UV-Vis spectrophotometry, and optical microscopy, together with pH and electrical conductivity (EC) measurements to evaluate the quality of the cultures and the changes induced by heavy metal stress. The results showed that metal removal is still efficient in multi-MT cultures. In particular, Cu, Cd, Pb, and Zn removal of multi-MT cultures is elevated or relative to the respective removal of the mono-metal-treated (mono-MT) cultures, showing a synergistic or cooperative interaction between the metals, while the removal of Ni of multi-MT cultures decreased compared to Ni of mono-MT cultures, showing an antagonistic interaction to the other metals. The study shows that <i>A. platensis</i> is considered an effective microalga toward the bioremediation of multi-metal polluted cultures.https://www.mdpi.com/2076-3417/15/2/791microalgaecyanobacteriabioremediationmulti-metal wasteAASNIR |
| spellingShingle | Lamprini Malletzidou Eleni Kyratzopoulou Nikoletta Kyzaki Evangelos Nerantzis Nikolaos A. Kazakis Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular Economy Applied Sciences microalgae cyanobacteria bioremediation multi-metal waste AAS NIR |
| title | Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular Economy |
| title_full | Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular Economy |
| title_fullStr | Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular Economy |
| title_full_unstemmed | Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular Economy |
| title_short | Towards the Sustainable Removal of Heavy Metals from Wastewater Using <i>Arthrospira platensis</i>: A Laboratory-Scale Approach in the Context of a Green Circular Economy |
| title_sort | towards the sustainable removal of heavy metals from wastewater using i arthrospira platensis i a laboratory scale approach in the context of a green circular economy |
| topic | microalgae cyanobacteria bioremediation multi-metal waste AAS NIR |
| url | https://www.mdpi.com/2076-3417/15/2/791 |
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