Bioremoval of the azo dye Congo Red by the microalga Chlorella vulgaris
Por:
Hernández-Zamora M., Cristiani-Urbina E., Martínez-Jerónimo F., Perales-Vela H.V., Ponce-Noyola T., Montes-Horcasitas M.C., CanizaresVillanueva, RO
Publicada:
1 jul 2015
Resumen:
Discharge of dye-containing wastewater by the textile industry can adversely affect aquatic ecosystems and human health. Bioremoval is an alternative to industrial processes for detoxifying water contaminated with dyes. In this work, active and inactive biomass of the microalga Chlorella vulgaris was assayed for the ability to remove Congo Red (CR) dye from aqueous solutions. Through biosorption and biodegradation processes, Chlorella vulgaris was able to remove 83 and 58% of dye at concentrations of 5 and 25 mg L-1, respectively. The maximum adsorption capacity at equilibrium was 200 mg g-1. The Langmuir model best described the experimental equilibrium data. The acute toxicity test (48 h) with two species of cladocerans indicated that the toxicity of the dye in the effluent was significantly decreased compared to the initial concentrations in the influent. Daphnia magna was the species less sensitive to dye (EC50= 17.0 mg L-1), followed by Ceriodaphnia dubia (EC50= 3.32 mg L-1). These results show that Chlorella vulgaris significantly reduced the dye concentration and toxicity. Therefore, this method may be a viable option for the treatment of this type of effluent. © Springer-Verlag Berlin Heidelberg 2015.
Filiaciones:
Hernández-Zamora M.:
Laboratorio de Biotecnología de Microalgas, Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. IPN 2508, San Pedro Zacatenco, Mexico D.F., 07360, Mexico
Cristiani-Urbina E.:
Departamento de Ingeniería Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Colonia Santo Tomás, Mexico D.F., 11340, Mexico
Martínez-Jerónimo F.:
Laboratorio de Hidrobiología Experimental, Departamento de Zoología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Colonia Santo Tomás, Mexico D.F., 11340, Mexico
Perales-Vela H.V.:
Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Unidad Morfol & Func, Lab Bioquim, Mexico City 54090, DF, Mexico
Ponce-Noyola T.:
Laboratorio de Bioprocesos y Bioproductos, Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. IPN 2508, San Pedro Zacatenco, Mexico D.F., 07360, Mexico
Montes-Horcasitas M.C.:
Laboratorio de Biocatálisis y Biología Molecular, Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. IPN 2508, San Pedro Zacatenco, Mexico D.F., 07360, Mexico
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