title: Biosorption of Pb2+ and Cd2+ in a fixed bed column with immobilised Chorella sp. biomass.
abstract: The biosorption of Pb2+ and Cd2+ in a fixed bed column by immobilised Chlorella sp. was characterised in a fixed bed column. Effect of initial concentration of Pb2+ and Cd2+, pH, and pellet size on the biosorption capacity was studied, at laboratory scale, using a factorial experiment design 2(3), in a 10 cm heightx1 cm of diameter continuous flow column packed with immobilised biomass. Equilibrium uptake of Pb2+ and Cd2+, increased with increasing initial metal ion concentration. It was favoured to pH 5, with a pellet of 5 mm of diameter. Langmuir model described the biosorption equilibrium of both metals.The biosorption of each single cation was studied too in a large column (50 cm heightx5 cm of diameter) at bench scale with a range of flow of 40 to 80 mL min(-1). The mass transfer coefficient was determined fitting the experimental data to continuity equations that were discretised in the radial terms with orthogonal collocation method.
authors.affiliation: Facultad de Ciencias Químicas, UANL. veroalcan@yahoo.com.mx
authors.forename: Veronica
authors.initials: V
authors.lastname: Almaguer Cantu
authors.forename: Ma Teresa
authors.initials: MT
authors.lastname: Garza-González
authors.forename: Javier Rivera
authors.initials: JR
authors.lastname: de la Rosa
authors.forename: Jose Angel
authors.initials: JA
authors.lastname: Loredo-Medrano
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D002104:Cadmium / Q000378:metabolism* / Q000493:pharmacokinetics; D018914:Cells, Immobilized / Q000166:cytology / Q000378:metabolism / Q000502:physiology; D002708:Chlorella / Q000166:cytology / Q000378:metabolism* / Q000502:physiology; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000378:metabolism* / Q000493:pharmacokinetics
chemical_list: D002104:Cadmium; D007854:Lead