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Cadmium biosorption by Saccharomyces cerevisiae
Author(s) -
Volesky B.,
May H.,
Holan Z. R.
Publication year - 1993
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260410809
Subject(s) - biosorption , cadmium , sorption , chemistry , saccharomyces cerevisiae , yeast , metal , anaerobic exercise , biomass (ecology) , nuclear chemistry , environmental chemistry , biochemistry , adsorption , biology , organic chemistry , ecology , physiology
Cadmium uptake by nonliving and resting cells of Saccharomyces cerevisiae obtained from aerobic or anaerobic cultures from pure cadmium‐bearing solutions was examined. The highest cadmium uptake exceeding 70 mg Cd/g was observed with aerobic baker's yeast biomass from the exponential growth phase. Nearly linear sorption isotherms featured by higher sorbing resting cells together with metal deposits localized exclusively in vacuoles indicate the possibility of a different metal‐sequestering mechanism when compared to dry nonliving yeasts which did not usually accumulate more than 20 mg Cd/g. The uptake of cadmium was relatively fast, 75% of the sorption completed in less than 5 min. © 1993 Wiley & Sons, Inc.