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Efecto de la asociación alga-bacteria Bostrychia calliptera (Rhodomelaceae) en el porcentaje de remoción de cromo en laboratorio

dc.creatorRengifo Gallego, Ana Lucía
dc.creatorPeña Salamanca, Enrique Javier
dc.creatorBenitez Campo, Neyla
dc.date2012-11-16
dc.date.accessioned2016-05-03T15:31:43Z
dc.date.available2016-05-03T15:31:43Z
dc.identifierhttp://revistas.ucr.ac.cr/index.php/rbt/article/view/1757
dc.identifier10.15517/rbt.v60i3.1757
dc.identifier.urihttp://hdl.handle.net/10669/27129
dc.descriptionAbstract: The effect of chromium removal by Algae-bacteria Bostrychia calliptera (Rhodomelaceae) consortia under laboratory conditions. Water pollution is one of the most important environmental problems worldwide. Recently, biotechnology studies have oriented efforts to study algae-bacterium consortia with the aim to understand the mechanisms to find a possible solution in environmental sciences. This study determined the percentage of chromium removal by the alga-bacterium association exposed to a set of different chromium concentrations under controlled in vitro conditions. Wild plants of Bostrychia calliptera associated with bacterial populations were collected from Dagua River, Pacific coast of Colombia, and were monitored in the laboratory. The trial was conducted with synthetic seawater in bioreactors at two chromium levels: 5 and 10mg/L, and four different experimental treatments: i) algae-bacteria (AB), ii) algae with antibiotic (AA), iii) algal surface sediment, Natural Bacterial Consortium (CBN), and iv) the control without algae or bacteria. The experimental design followed a model of two factors (chromium concentration x combination types) with repeated measures using one factor. The microbial population behavior and the chromium concentration percentage were monitored by using atomic absorption spectroscopy (AAS). According to the data, Algae-bacteria (AB) treatment was the most efficient combination at 10mg/L (87%), whereas the bacterial consortia (CBN) was the most efficient at 5mg/L (62.85%). The results showed significant differences of chromium uptake between algae-bacteria (AB) and natural bacterial consortia (CBN), meaning the importance of those treatments in the chromium removal from coastal waters.en-US
dc.descriptionPara determinar el porcentaje de remoción de cromo en la asociación alga-bacteria, se tomaron ejemplares del alga Bostrychia calliptera de pneumatóforos de Avicennia germinans y Rizophora mangle, en la desembocadura del Río Dagua, Pacífico colombiano. El ensayo se realizó in vitro en agua marina sintética a dos concentraciones de cromo 5 y 10mg/L, empleando biorreactores con cuatro tratamientos; i) material Alga-Bacteria (AB), ii) material algal con antibiótico Alga-antibiótico (AA), iii) consorcio bacteriano natural (CBN) y iv) control sin presencia de B. calliptera ni bacteria. Se monitoreó el comportamiento de poblaciones bacterianas y el porcentaje de disminución de cromo mediante AAS (Espectroscopía de absorción atómica). Se obtuvo diferencias significativas entre los tratamientos Alga-bacteria (AB) y el consorcio bacteriano natural (CBN), siendo Alga-bacteria más eficiente a 10mg/L (87%). El consorcio bacteriano natural CBN obtuvo mayor porcentaje de remoción a bajas concentraciones de cromo a 5ppm (62.85%). Los resultados mostraron una interacción positiva entre las bacterias asociadas (CBN) a la superficie del alga roja B. calliptera en su proceso acumulativo de cromo.es-ES
dc.formatapplication/pdf
dc.languagespa
dc.publisherUniversidad de Costa Ricaen-US
dc.rightsCopyright (c) 2014 International Journal of Tropical Biology and Conservationen-US
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 60 (3) September 2012en-US
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 60 (3) September 2012es-ES
dc.sourceRevista Biología Tropical; Vol. 60 (3) September 2012pt-PT
dc.source2215-2075
dc.source0034-7744
dc.source10.15517/rbt.v60i3
dc.subjectBostrychia callipteraen-US
dc.subjectchromium-reducing bacteriaen-US
dc.subjectbiotransformationen-US
dc.subjectwater pollutionen-US
dc.subjectchromium contaminationen-US
dc.subjectcromoes-ES
dc.subjectBostrychia callipteraes-ES
dc.subjectbacterias reductoras de cromoes-ES
dc.subjectbiotransformación de metales pesadoses-ES
dc.subjectcontaminación por cromoes-ES
dc.titleEfecto de la asociación alga-bacteria Bostrychia calliptera (Rhodomelaceae) en el porcentaje de remoción de cromo en laboratorioen-US
dc.titleEfecto de la asociación alga-bacteria Bostrychia calliptera (Rhodomelaceae) en el porcentaje de remoción de cromo en laboratorioes-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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