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Green Nanotechnology for the Remediation of Cyanotoxins from Contaminated Waters †

Departamento de Farmacología, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain
Departamento de Fisiología, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain
Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
Author to whom correspondence should be addressed.
Presented at the 7th Iberian Congress on Cyanotoxins/3rd Iberoamerican Congress on Cyanotoxins, Ponta Delgada, Portugal, 18–20 July 2022.
Presenting author (poster).
Biol. Life Sci. Forum 2022, 14(1), 12;
Published: 19 July 2022


The presence of contaminants in water may involve a risk to human and animal health. Conventional water treatment methods such as coagulation, flocculation, and sedimentation are ineffective for cyanotoxin removal. In addition, high amounts of cyanotoxins can be released during those processes if cells lyse. Thus, new mitigation strategies must be developed to ameliorate the consequences of harmful algal blooms. In this sense, nanotechnology has become a promising tool for the treatment of contaminated water. Several nanomaterials with specific chemical affinities can be combined into hybrid structures, leading to nanostructured agents with a large surface area and with the ability to absorb different contaminants. In addition, these structures can include magnetite, which enables separation from the detoxified substance by magnetic extraction, which is considered a green technique. This approach has been successfully applied to the removal of dyes, endocrine disruptors, and heavy metal ions. Recently, we have described the use of carbon nanoparticles to remove around 60% of microcystins from contaminated solutions, but with a low efficiency in the adsorption of anatoxin-a and cylindrospermopsin. In this work, a new set of biocompatible magnetic nanocomposites were tested using artificially contaminated water. The toxin content in solutions was determined before and after treatment by ultra-performance liquid chromatography–tandem mass spectrometry (UHPLC-MS/MS). With these new nanocomposites, cyanotoxin elimination was highly improved, reaching toxin removal rates of up 80%. Therefore, the implementation of the nanotechnology in water treatment could be a promising approach to reduce the presence of natural toxins in the water.

Author Contributions

Conceptualization, L.M.B. and J.R.; methodology, A.A. and Y.P.; investigation, J.M.G.-J., R.A., I.R.-C., M.R.V., L.d.C. and M.G.; writing—original draft preparation, J.M.G.-J.; funding acquisition, L.M.B. and J.R. All authors have read and agreed to the published version of the manuscript.


The research leading to these results has received funding from the following FEDER cofunded-grants from the Conselleria de Cultura, Educacion e Ordenación Universitaria, Xunta de Galicia, GRC (ED431C 2021/01), from the Ministerio de Ciencia e Innovación IISCIII/PI19/001248, PID 2020-11262RB-C21, from the European Union Interreg Agritox EAPA-998-2018, and H2020 778069-EMERTOX.

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

Datasets used in this study are available from the corresponding author on reasonable request.

Conflicts of Interest

The authors declare no conflict of interest.
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MDPI and ACS Style

González-Jartín, J.M.; Alfonso, A.; Alvariño, R.; Rodríguez-Cañás, I.; Vieytes, M.R.; Piñeiro, Y.; de Castro, L.; González, M.; Rivas, J.; Botana, L.M. Green Nanotechnology for the Remediation of Cyanotoxins from Contaminated Waters. Biol. Life Sci. Forum 2022, 14, 12.

AMA Style

González-Jartín JM, Alfonso A, Alvariño R, Rodríguez-Cañás I, Vieytes MR, Piñeiro Y, de Castro L, González M, Rivas J, Botana LM. Green Nanotechnology for the Remediation of Cyanotoxins from Contaminated Waters. Biology and Life Sciences Forum. 2022; 14(1):12.

Chicago/Turabian Style

González-Jartín, Jesús M., Amparo Alfonso, Rebeca Alvariño, Inés Rodríguez-Cañás, Mercedes R. Vieytes, Yolanda Piñeiro, Lisandra de Castro, Manuel González, Jose Rivas, and Luis M. Botana. 2022. "Green Nanotechnology for the Remediation of Cyanotoxins from Contaminated Waters" Biology and Life Sciences Forum 14, no. 1: 12.

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