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Evaluación de la presencia de bifenilos policlorados (PCBs) en el suelo de la ciénaga las cucharillas en Cataño y los riesgos potenciales a las comunidades adyacentes (recurso electrónico) / Joanne Negrón Caldero, Harry Peña Ruiz, Carlos R. Morales Agrinzoni, Beatriz Zayas Rivera
En: Perspectivas en asuntos ambientales (ISSN 2167-6828) vol. 2; 2013: p 126-137. bibl. table.
Revista: Perspectivas en asuntos ambientales, vol. 2; 2013
Resumen: We evaluated the potential risks associated to the presence of polychlorinated biphenyls (PCB’s) in Las Cucharillas marsh and their adjacent communities located in the Cataño municipality. The sampling was performed in 2008 at 12 different areas. The selected areas were previously studied for heavy metals presence: power substation of the Puerto Rico Electric Power Authority, thermoelectric adjacent to the marsh and an clandestine dump site. Twelve soil samples taken at 0.61 meters depth and eight congeners for PBC’s were analyzed. Chemical analysis was performed by Beckton Laboratories Inc. following the EPA 8082 method. PCB’s concentration values were evaluated against the established regulatory agencies value range. All the results obtained (0.043 0.092 milligrams per kilogram of soil) were below the concentration range with the exception of the Threshold Effect Limit (TEL). TEL concentrations are the minimal concentrations to which persons can be exposed and rarely observe adverse biological effects. When the potential PCB’s exposure impacts in adjacent communities were evaluated, we concluded that they were minimal. Nevertheless, more susceptible organisms than humans can be affected based on the fact that PCB’s can be bioaccumulated and biomagnified. The lower concentrations of PCB’s obtained could be the result of the movement of organic matter with PCB’s, to the aquatic systems during rainfall periods. Since data obtained were lower than the detection limit of the instrument, we concluded that it could be the result of the presence of PCB’s traces, the instrument’s interference or, a combination of both. Therefore, we recommend to repeat this investigation using an instrument with a lower detection limit, as well as to determine the possible presence of PCB’s in the aquatic system, aquatic sediments, fauna and flora of the Las Cucharillas Marsh. Since studies have demonstrated that microorganisms and some kinds of trees partially biodegrade PCB’s wetland sediments, we also recommend to perform studies to evaluate this phenomenon.
Palabras Claves: Bifenilos policlorados, PCBs, ciénaga Las Cucharillas, método 8082 de la EPA, Aroclor 1254
Areas Temáticas:

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