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. 2015 Nov;22(21):16742-8.
doi: 10.1007/s11356-015-4859-y. Epub 2015 Jun 20.

Biosorption and bioaccumulation of thallium by thallium-tolerant fungal isolates

Jialong Sun  1   2   3 , Xiao Zou  4 , Tangfu Xiao  5 , Yanlong Jia  1   3 , Zengping Ning  3 , Min Sun  3 , Yizhang Liu  3 , Tao Jiang  3
Affiliations

Biosorption and bioaccumulation of thallium by thallium-tolerant fungal isolates

Jialong Sun et al. Environ Sci Pollut Res Int. 2015 Nov.

Abstract

Little is known about the biosorption and bioaccumulation capacity of thallium (Tl) by microorganisms that occur in Tl-polluted soil. The present study focused on characterizing the biosorption and bioaccumulation of Tl by Tl-tolerant fungi isolated from Tl-polluted soils. Preliminary data showed a positive correlation between the biomass and the biosorbed Tl content. The Tl-tolerant strains were capable of bioaccumulating Tl, up to 7189 mg kg(-1) dry weight. The subcellular distribution of Tl showed obvious compartmentalization: cytoplasm ≫ cell wall > organelle. The majority of Tl (up to 79%) was found in the cytoplasm, suggesting that intracellular compartmentalization appeared to be responsible for detoxification. These findings further suggest the applicability of the fungal isolates for cleanup of Tl in Tl-polluted water and soil.

Keywords: Bioaccumulation; Biosorption; Fungal isolates; Subcellular distribution; Thallium.

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