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Estudio preliminar sobre la capacidad de remoción de arsénico por las microalgas nativas de Costa Rica Chlorella vulgaris y Scenedesmus dimorfus (Chlorophyceae).

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Title: Estudio preliminar sobre la capacidad de remoción de arsénico por las microalgas nativas de Costa Rica Chlorella vulgaris y Scenedesmus dimorfus (Chlorophyceae).
Alternate Title: Preliminary study on the arsenic removal capacity of native Costa Rican microalgae Chlorella vulgaris and Scenedesmus dimorfus (Chlorophyceae).
Authors: Margarita Silva-Benavides, Ana1,2 ana.silva@ucr.ac.cr, Jiménez-Conejo, Natalia2 natalia.jimenezconejo@ucr.ac.cr, Solís-Calderón, Catalina3 csolis@aya.go.cr, Arias Barrantes, Betzabel3 bearias@aya.go.cr
Source: Revista de Biología Tropical. 2025 Supplement, Vol. 73, p1-12. 12p.
Subjects: ENVIRONMENTAL health, ANIMAL health, HEAVY metals, INVESTIGATIONAL therapies, POLLUTION, CHLORELLA vulgaris, ARSENIC in water
Abstract (English): Introduction: The accumulation of heavy metals, such as arsenic, in aquatic ecosystems may lead to significant ecological and health issues, disrupting environmental stability and potential risks to human, plant, and animal health. Phytoremediation, particularly using microalgae as bioremediation, offers a promising approach to address these pollution challenges. Objective: This study aimed to evaluate the arsenic removal capacity of two green microalgae species, Chlorella vulgaris and Scenedesmus dimorphus. Methods: Both species were collected from water sources in Vuelta de Kooper ASADA 5, Aguas Zarcas, San Carlos. Initial strains of C. vulgaris and S. dimorphus were grown in BG11 culture medium under controlled light and temperature conditions. The biomass from each culture was resuspended in water samples from the ASADA in Aguas Zarcas (with known Arsenic concentration), and some reagents from the BG11 medium. Experimental treatments were conducted for 8 and 13 days for C. vulgaris, and 12-13 days for S. dimorphus, with a control treatment. The total chlorophyll concentration, temperature, and pH were monitored. Results: The results demonstrated a significant capacity for arsenic removal. C. vulgaris obtained an average arsenic removal of 20.51 % after 8 days of treatment and 31.67 % after 13 days. After 13 days of treatment, S. dimorphus showed an average arsenic removal of 47.19 %. According to bioaccumulation, both species exhibited bioaccumulation percentages greater than 97 %. Conclusion: The arsenic removal and bioaccumulation data have demonstrated the potential of C. vulgaris and S. dimorphus as promising candidates for the phytoremediation of arsenic-contaminated waters. [ABSTRACT FROM AUTHOR]
Abstract (Spanish): Introducción: La acumulación de metales pesados, como el arsénico, en los ecosistemas acuáticos puede causar serios problemas a los organismos vivos, perjudicando la estabilidad del ambiente, representando una amenaza para la salud humana, plantas y animales. Estos problemas de contaminación pueden ser parcialmente resueltos mediante procesos de fitorremediación utilizando microalgas como organismos biorremediadores. Objetivo: Evaluar la capacidad de remoción del arsénico de dos microalgas verdes, Chlorella vulgaris y Scenedesmus dimorfus. Métodos: Ambas especies fueron recolectadas y aisladas de las fuentes de agua de Vuelta de Kooper Asada 5, de Aguas Zarcas de San Carlos. Los inóculos iniciales de C. vulgaris y S. dimorfus fueron cultivados en medio nutritivo BG11 bajo condiciones controladas de luz y temperatura. Posteriormente, la biomasa obtenida en cada uno de los cultivos fue resuspendida en muestras de agua de la ASADA de Agua Zarcas con una concentración de arsénico conocida y algunos reactivos del medio BG11. Se realizaron ensayos de 8 y 12-13 días para C. vulgaris y de 12-13 días para S. dimorphus, con un tratamiento control sin biomasa. Se monitoreó la concentración de clorofila total, temperatura y pH. Resultados: Los resultados demuestran una notable capacidad de remoción de arsénico; donde C. vulgaris alcanzó un porcentaje promedio de remoción de un 20.51 % para 8 días de tratamiento y 31.67 % en 13 días. Por otra parte, durante 13 días de tratamiento S. dimorphus presentó un porcentaje de remoción de arsénico promedio en el medio de un 47.19 %. En cuanto la bioacumulación, ambas especies mostraron un porcentaje de bioacumulación mayor a 97 %. Conclusión: Los porcentajes de remoción de arsénico en el medio su acumulación en la biomasa destaca el potencial uso de C. vulgaris y S. dimorfus como especies candidatas para el tratamiento de aguas contaminadas. [ABSTRACT FROM AUTHOR]
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Database: MedicLatina
Description
Abstract:Introduction: The accumulation of heavy metals, such as arsenic, in aquatic ecosystems may lead to significant ecological and health issues, disrupting environmental stability and potential risks to human, plant, and animal health. Phytoremediation, particularly using microalgae as bioremediation, offers a promising approach to address these pollution challenges. Objective: This study aimed to evaluate the arsenic removal capacity of two green microalgae species, Chlorella vulgaris and Scenedesmus dimorphus. Methods: Both species were collected from water sources in Vuelta de Kooper ASADA 5, Aguas Zarcas, San Carlos. Initial strains of C. vulgaris and S. dimorphus were grown in BG11 culture medium under controlled light and temperature conditions. The biomass from each culture was resuspended in water samples from the ASADA in Aguas Zarcas (with known Arsenic concentration), and some reagents from the BG11 medium. Experimental treatments were conducted for 8 and 13 days for C. vulgaris, and 12-13 days for S. dimorphus, with a control treatment. The total chlorophyll concentration, temperature, and pH were monitored. Results: The results demonstrated a significant capacity for arsenic removal. C. vulgaris obtained an average arsenic removal of 20.51 % after 8 days of treatment and 31.67 % after 13 days. After 13 days of treatment, S. dimorphus showed an average arsenic removal of 47.19 %. According to bioaccumulation, both species exhibited bioaccumulation percentages greater than 97 %. Conclusion: The arsenic removal and bioaccumulation data have demonstrated the potential of C. vulgaris and S. dimorphus as promising candidates for the phytoremediation of arsenic-contaminated waters. [ABSTRACT FROM AUTHOR]
ISSN:00347744
DOI:10.15517/rev.biol.trop..v73iS1.64045