title: Comparison and characterization of biosorption by Weissella viridescens MYU 205 of periodic group 12 metal ions.
abstract: Because heavy metals cause various health hazards, we studied biosorption by Weissella viridescens MYU 205. MYU 205 showed high biosorption for Cd (II) and Hg (II) and was low for Zn (II). The Hg (II) biosorption rate was high at about 80%. Different biosorptions were shown for each metal after successive incubation. About 20% of the Zn (II) biosorption was observed after 3 h. Cd (II) biosorption increased in a time-dependent manner until 3 h, then gradually decreased. Hg (II) was immediately sorbed at 79.6 ± 4.7% and decreased at 3 h to 52.9 ± 2.6%, and then gradually increased to 77.8 ± 3.6%. Using heat-killed cells, the rate of biosorption of Zn (II) and Cd (II) decreased whereas Hg (II) tended to increase. The metal resistance was high, that is Zn (II) > Cd (II) > Hg (II); while the affinity was opposite where MYU 205 showed high affinity to Hg (II) and low affinity to Zn (II). Our data shows lactic acid bacteria may be powerful heavy metal sorbents for detoxification.
authors.affiliation: Department of Food Management, School of Food, Agricultural and Environmental Sciences, Miyagi University, Sendai, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Kinoshita
authors.affiliation: Department of Food Management, School of Food, Agricultural and Environmental Sciences, Miyagi University, Sendai, Japan.
authors.forename: Fumika
authors.initials: F
authors.lastname: Ohtake
authors.affiliation: Department of Food Management, School of Food, Agricultural and Environmental Sciences, Miyagi University, Sendai, Japan.
authors.forename: Yuuki
authors.initials: Y
authors.lastname: Ariga
authors.affiliation: Department of Food Management, School of Food, Agricultural and Environmental Sciences, Miyagi University, Sendai, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Kimura
mesh_terms: D000327:Adsorption; D019187:Cadmium Compounds / Q000378:metabolism; D007477:Ions; D017669:Mercury Compounds / Q000378:metabolism; D019216:Metals, Heavy / Q000378:metabolism*; D016060:Sorption Detoxification; D013997:Time Factors; D058836:Weissella / Q000378:metabolism*; D017967:Zinc Compounds / Q000378:metabolism
chemical_list: D019187:Cadmium Compounds; D007477:Ions; D017669:Mercury Compounds; D019216:Metals, Heavy; D017967:Zinc Compounds
keywords: biosorption; detoxification; heavy metal; lactic acid bacteria; mercury