Remoción de mercurio por Phragmites Australis empleada como barrera biológica en humedales artificiales inoculados con cepas tolerantes a metales pesados
Por:
Amabilis-Sosa, L.E., Siebe, C., Moeller-Chávez, G., Durán-Domínguez-De-bazúa, M.C.
Publicada:
1 ene 2016
Resumen:
In this study, accumulation and distribution of mercury in common reed (Phragmites australis) as a biological barrier in constructed wetlands (CW) were assessed during wastewater treatment. Six CW, planted with common reed, were built, three of them were inoculated with heavy metal-tolerant strains and the otherthree were non-inoculated. Also three systems unplanted and non-inoculated were built as control. The feeding water was synthetic wastewater with 0.11 mg/L of mercury, value established in previous studies and reported for effluents of industries related to the use of this metal. After 304 operation days, systems with common reed and metal-tolerant bacteria were able to remove 73 % of total mercury. With similar values, systems with vegetation but without metal-tolerant bacteria, removed 66 % of it. In both systems, mercury was transferred, mostly, to atmosphere due to accumulation, translocation and transpiration exhibited by reed. Meanwhile, systems used as control, removed 52 % of total mercury and transferred the lowest amount of metal to the atmosphere. The results obtained from this study give important basic data to expand knowledge about the technical feasibility of using CW to treat wastewaters containing mercury. © 2016, Centro de Ciencias de la Atmosfera, UNAM. All rights reserved.
Filiaciones:
Amabilis-Sosa, L.E.:
Facultad de Química Conjunto E, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito de la Investigación Científica s/n, Delegación Coyoacán, México DF, Mexico
Siebe, C.:
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito de la Investigación Científica s/n, Delegación Coyoacán, México D.F, Mexico
Moeller-Chávez, G.:
Universidad Politécnica del Estado de Morelos, Boulevard Cuauhnáhuac 566, Colonia Lomas del Texcal, Jiutepec, México, Morelos, Mexico
Durán-Domínguez-De-bazúa, M.C.:
Facultad de Química Conjunto E, Universidad Nacional Autónoma de México, Ciudad Universitaria, Circuito de la Investigación Científica s/n, Delegación Coyoacán, México DF, Mexico
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