The use of hollow fiber cross-flow microfiltration in bioaccumulation and continuous removal of heavy metals from solution by Saccharomyces cerevisiae
- Rhodes Univ., Grahamstown (South Africa). Dept. of Biochemistry and Microbiology
Cross-flow microfiltration was shown to retain Saacharomyces cerevisiae biomass utilized for heavy metal bioaccumulation. The passage of metal-laden influent through a series of sequential bioaccumulation systems allowed for further reductions in the levels of copper, cadmium, and cobalt in the final effluent than that afforded by a single bioaccumulation process. Serial bioaccumulation systems also allowed for partial separation of metals from dual metal influents. More than one elemental metal cation could be accumulation simultaneously and in greater quantities than when a single metal was present in the effluent (Cu[sup 2+] 0.43 mmol, Cu[sup 2+] + Cd[sup 2+] 0.67 mmol, and Cu[sup 2+] + Co[sup 2+] 0.83 mmol/g yeast dry mass when the initial concentration of each of the metal species was 0.2 mmol[center dot]L[sup [minus]1]). Co-accumulation of two different metal cations allowed higher total levels of bioaccumulation than found with a single metal. The flux rate was 2.9 [times] 10[sup 2] L[center dot]h[sup [minus]2][center dot]m[sup [minus]2] using a polypropylene microfiltration membrane.
- OSTI ID:
- 6724175
- Journal Information:
- Biotechnology and Bioengineering; (United States), Vol. 44:11; ISSN 0006-3592
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CADMIUM
BIOLOGICAL ACCUMULATION
REMOVAL
COBALT
COPPER
SACCHAROMYCES CEREVISIAE
GROWTH
CHEMICAL EFFLUENTS
REMEDIAL ACTION
TECHNOLOGY ASSESSMENT
WATER POLLUTION CONTROL
CHEMICAL WASTES
CONTROL
ELEMENTS
EUMYCOTA
FUNGI
METALS
MICROORGANISMS
NONRADIOACTIVE WASTES
PLANTS
POLLUTION CONTROL
SACCHAROMYCES
TRANSITION ELEMENTS
WASTES
YEASTS
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology