The accumulation of rare-earth yttrium ions by Penicillium sp. ZD28.

ABSTRACT: To obtained fungal resources with excellent tolerance and accumulation capacity to rare earth yttrium ions (Y3+), rare earth ore samples were collected and used for microbial screening. A fungus hyper-resistant to Y3+ was obtained and the effects of the fungus in three physiological states (growth process, mycelial pellets with physiological activity and the fungus powder after being ground) on the Y3+ accumulation were investigated. The Y3+ resistant fungus was identified as Penicillium sp. ZD28, and its mycelium pellets (about 1 mm in diameter) showed poor ability to accumulate Y3+ with an adsorption capacity of less than 81 ?mol/g. However, the fungus was able to remove 99% of Y3+ during the growth process, at an initial concentration of less than 600 ?M. Bioaccumulation of Y was observed on the cell surface of the ZD28 strain by elemental mapping using scanning electron microscopy-energy dispersive X-ray spectroscopy. The adsorbent (the dry fungal powder) had a remarkable adsorption property for Y3+ that was greater than 455 ?mol/g in conditions of 465 ?M?

SUBMITTER: Wang W 

PROVIDER: S-EPMC6997312 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature