Study on heavy metals biosorption ability of Saccharomyces cerevisiae

Abstract

Potential Saccharomyces cerevisiae was isolated from paper effluent for bioremediation of heavy metals. Morphological studies, physiological tests and molecular characterization confirmed isolated yeast colony was S. cerevisiae. S. cerevisiae has showed high biosorption of Cd 2 + (67%), followed by Pb. SEM image of heavy metals treated S. cerevisiae showed patches of accumulated heavy metals and ED's spectrum of S. cerevisiae treated with heavy metals contained metal peaks. Elemental analysis by EDS confirmed that ion exchange mainly involved in heavy metals biosorption by S. cerevisiae. Optimization of parameters made maximum biosorption of heavy metals. The pH 4.0-5.0, temperature 20-25°C and contact time of 60 minute was found optimal for heavy metals biosorption. The metal biosorption was found maximum in single metal system compared to multi metal ions. Pre-treatment method enhanced the metal biosorption. Sorption isotherm studies fit into the model of Langmuir isotherm compared to Freundlich isotherm.

Investigation of the simulated microgravity impact on heavy metal biosorption by Saccharomyces cerevisiae

“…The absorption order of Pb and Cd by S. cerevisiae was opposite to Thippeswamy et al. ( 2014 ) study in NG, which could be due to the difference in the duration of the adsorbent's adjacent with metals or much higher concentration of metals (Thippeswamy et al., 2014 ).…”

Removal of Cadmium from Aqueous Solutions by Saccharomyces cerevisiae–Alginate System

“…A negative biosorbent system surface charge favors the electrostatic interaction with Cd 2+ and, thus, its removal from aqueous solutions [13,43]. Cadmium-enriched water exposition shifted the surface charge of all alginate beads from negative to positive zeta potentials (Table 1), ranging from 4.9 to 9.9 mV for empty Ca-alginate beads and 1.7 to 5.1 mV for alginate beads loaded with S. cerevisiae.…”