title: In vitro biosorption of ochratoxin A on the yeast industry by-products: comparison of isotherm models.
abstract: Biosorption of ochratoxin A (OA) onto yeast biomass appears to be a reasonably low cost decontamination method. In vitro adsorption of OA onto three yeast industry by-products: a vinasse containing yeast cell walls (EX16), a purified yeast beta-glucan (BETA) and a yeast cell wall fraction (LEC) was examined at 25 degrees C. Seven classical adsorption models were tested to provide the best description of toxin adsorption. A comparison of these models was performed using the magnitude of the coefficient of determination R(2) for the linear models and the value of the sum of normalised errors (SNE) for linear and non-linear models. Based on the R(2) and the SNE values, Hill, Freundlich and Brunauer-Emmett-Teller equations produced the best models for OA biosorption onto respectively, EX16, BETA and LEC. For these best models, the values of isotherm constants were consistent when measured using both linear and non-linear calculations. The SNE calculation procedure presented in this paper in association with the linear equation analysis method is an appropriate approach for designing a better adsorption isothermal model.
authors.affiliation: Institut Supérieur d'Agriculture de Beauvais, Rue Pierre Waguet, BP 30313, Beauvais Cedex 60026, France. diana.ringot@isab.fr
authors.forename: Diana
authors.initials: D
authors.lastname: Ringot
authors.forename: Benoit
authors.initials: B
authors.lastname: Lerzy
authors.forename: Kathy
authors.initials: K
authors.lastname: Chaplain
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Bonhoure
authors.forename: Eric
authors.initials: E
authors.lastname: Auclair
authors.forename: Yvan
authors.initials: Y
authors.lastname: Larondelle
mesh_terms: D000327:Adsorption; D018533:Biomass; D002473:Cell Wall / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D066298:In Vitro Techniques; D008956:Models, Chemical; D009793:Ochratoxins / Q000737:chemistry* / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000737:chemistry* / Q000166:cytology / Q000378:metabolism*; D013696:Temperature; D047071:beta-Glucans / Q000378:metabolism
chemical_list: D009793:Ochratoxins; D047071:beta-Glucans