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Appl Environ Microbiol. 1962 March; 10(2): 141-145

Influence of Several Factors on the Applicability of Freundlich's Law to the Adsorption of Methylene Blue by Dead Yeast Cells¹

Department of Chemical Engineering, Escola Politécnica, University of São Paulo, São Paulo, Brazil

ABSTRACT

The influence of the following factors on the methylene blue adsorption by dead yeast cells was studied: temperature and time of heating used to kill the cell, storage of the suspensions of dead yeast, pH of the suspension during dyeing, buffer composition, and age of the yeast culture. Great variations of the adsorption law coefficients, caused by small experimental variations of the cell concentration or the dye concentration, were found. It was also observed that a linear relationship exists between these coefficients.

¹ This article was abstracted from a thesis supervised by Walter Borzani and presented at the Escola de Engenharia de São Carlos of the University of São Paulo.