Removal of Cyanobacteria and Cyanotoxins in Waters

Serrà, Albert; Philippe, Laëtitia; Gómez, Elvira

doi:10.3390/toxins13090636

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…Nutrients [31] Green liver system Cyanotoxins Wastewater from aquaculture [32] Floc and sink Cyanobacteria [33] Lanthanum-modified bentonite (LMB-sink/lock)…”

Section: Technology Pollutant Source Of Pollution Referencesmentioning

confidence: 99%

Advances in Sustainable Strategies for Water Pollution Control: A Systematic Review

Kamil Abdallah,

Jerry Cobbina,

A. Mourad

et al. 2024

Environmental Sciences

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Various technologies, strategies, and policies have been implemented to improve water quality worldwide. This systematic review comprehensively appraises technologies, strategies, and water pollution control policies enacted worldwide between 2000 and 2021. Five databases, Web of Science, PubMed, Scopus, Google Scholar, and Library of Congress, were used for the search. After screening, 89 eligible articles were selected from 2119 documents for further analysis. Selected articles were included: (1) 31 articles covered policies and strategies enacted for controlling water pollution, (2) 47 articles focused on sustainable technologies to control water pollution in different countries, and (3) 11 articles were Nature-based solutions related. Sustainable technologies identified were: aquatic vegetation restoration technology, eco-remediation bio-manipulation technology, wetlands rehabilitation technology, floating aquatic-plant bed systems, and adsorption technology. Most of these methods are geared toward reducing pollutant levels in industrial and agricultural wastewater. Also, most policies are geared toward the manufacturing and farming industries, respectively. Nature-based solutions identified were horizontal-flow treatment wetlands (HFTWs) and constructed wetlands. Furthermore, the current one is atomic layer deposition (ALD).

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“…Nutrients [31] Green liver system Cyanotoxins Wastewater from aquaculture [32] Floc and sink Cyanobacteria [33] Lanthanum-modified bentonite (LMB-sink/lock)…”

Section: Technology Pollutant Source Of Pollution Referencesmentioning

confidence: 99%

Advances in Sustainable Strategies for Water Pollution Control: A Systematic Review

Kamil Abdallah,

Jerry Cobbina,

A. Mourad

et al. 2024

Environmental Sciences

View full text Add to dashboard Cite

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“…Cyanobacterial cells and small amounts of toxins were successfully eliminated using conventional portable water treatment techniques such as coagulation, sedimentation, filtration, and chlorination [ 342 , 343 ]. The removal strategy, however, must be carefully chosen during a strong bloom when there are significant amounts of cyanobacterial cells and/or their cyanotoxins in the water because some cyanotoxins can be treated with this strategy, while others cannot [ 343 ].…”

Section: Managing and Mitigating Cyanobacterial Blooms And Toxinsmentioning

confidence: 99%

“…Cyanotoxins that are intracellular and extracellular (dissolved) can be removed using various techniques. Numerous techniques have been utilized to remove internal cyanotoxins, including coagulation/sedimentation, coagulation-dissolved air flotation (DAF), micro- and ultrafiltration, and pre-treatment oxidation [ 343 , 344 , 345 , 346 , 347 , 348 , 349 ]. While some techniques for eliminating extracellular (dissolved) cyanotoxins have been mentioned in the literature, these techniques include membranes (nano- and ultrafiltration), potassium permanganate, ozonation, the use of free chlorine, ultraviolet radiation, physical cyanotoxin adsorption using powdered activated carbon (PAC), granular activated carbon (GAC), and activated carbon adsorption [ 350 , 351 , 352 , 353 , 354 ].…”

Section: Managing and Mitigating Cyanobacterial Blooms And Toxinsmentioning

confidence: 99%

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Understanding the Risks of Diffusion of Cyanobacteria Toxins in Rivers, Lakes, and Potable Water

Thawabteh,

Naseef,

Karaman

et al. 2023

Toxins

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Blue-green algae, or cyanobacteria, may be prevalent in our rivers and tap water. These minuscule bacteria can grow swiftly and form blooms in warm, nutrient-rich water. Toxins produced by cyanobacteria can pollute rivers and streams and harm the liver and nervous system in humans. This review highlights the properties of 25 toxin types produced by 12 different cyanobacteria genera. The review also covered strategies for reducing and controlling cyanobacteria issues. These include using physical or chemical treatments, cutting back on fertilizer input, algal lawn scrubbers, and antagonistic microorganisms for biocontrol. Micro-, nano- and ultrafiltration techniques could be used for the removal of internal and extracellular cyanotoxins, in addition to powdered or granular activated carbon, ozonation, sedimentation, ultraviolet radiation, potassium permanganate, free chlorine, and pre-treatment oxidation techniques. The efficiency of treatment techniques for removing intracellular and extracellular cyanotoxins is also demonstrated. These approaches aim to lessen the risks of cyanobacterial blooms and associated toxins. Effective management of cyanobacteria in water systems depends on early detection and quick action. Cyanobacteria cells and their toxins can be detected using microscopy, molecular methods, chromatography, and spectroscopy. Understanding the causes of blooms and the many ways for their detection and elimination will help the management of this crucial environmental issue.

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“…Numerous existing approaches have been adopted to remove CyanoHABs and their deleterious MCs from water sources. Indeed, some technologies, like coagulation-flocculation, air floatation, sedimentation, filtration, and disinfection, show high removal efficiencies of cyanobacteria cells [8][9][10][11]. These conventional methods are, however, ineffective for removing soluble MCs released into water during cell aging and/or as a result of cell deterioration caused by external stressors or by the treatment itself [12,13].…”

Section: Introductionmentioning

confidence: 99%

Adsorbents Used for Microcystin Removal from Water Sources: Current Knowledge and Future Prospects

et al. 2022

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The increasing occurrence of toxic cyanobacteria in water sources, driven by climate change and eutrophication, is of great concern worldwide today. Cyanobacterial blooms can negatively affect water bodies and generate harmful secondary metabolites, namely microcystins (MCs), which significantly impair water quality. Various adsorbents used for MC removal from water sources were assessed in this investigation. Activated carbon constitutes the most widely used adsorbent for treating contaminated waters due to its high affinity for adsorbing MCs. Alternative adsorbents have also been proposed and reported to provide higher efficiency, but the studies carried out so far in this regard are still insufficient. The mechanisms implicated in MC adsorption upon different adsorbents should be further detailed for a better optimization of the adsorption process. Certainly, adsorbent characteristics, water pH and temperature are the main factors influencing the adsorption of MCs. In this context, optimization studies must be performed considering the effectiveness, economic aspects associated with each adsorbent. This review provides guidelines for more practical field applications of the adsorption in the treatment of waters actually contaminated with MCs.

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Removal of Cyanobacteria and Cyanotoxins in Waters

Abstract: Harmful cyanobacterial algal blooms and cyanotoxins currently pose a major threat to global society, one that exceeds local and national interests due to their extremely destructive effects on the environment and human health [...]

Cited by 6 publications

References 14 publications

Advances in Sustainable Strategies for Water Pollution Control: A Systematic Review

Advances in Sustainable Strategies for Water Pollution Control: A Systematic Review

Understanding the Risks of Diffusion of Cyanobacteria Toxins in Rivers, Lakes, and Potable Water

Adsorbents Used for Microcystin Removal from Water Sources: Current Knowledge and Future Prospects

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