Microbial copper reduction method to scavenge anthropogenic radioiodine.

Abstract:

:Unexpected reactor accidents and radioisotope production and consumption have led to a continuous increase in the global-scale contamination of radionuclides. In particular, anthropogenic radioiodine has become critical due to its highly volatile mobilization and recycling in global environments, resulting in widespread, negative impact on nature. We report a novel biostimulant method to effectively scavenge radioiodine that exhibits remarkable selectivity for the highly difficult-to-capture radioiodine of >500-fold over other anions, even under circumneutral pH. We discovered a useful mechanism by which microbially reducible copper (i.e., Cu(2+) to Cu(+)) acts as a strong binder for iodide-iodide anions to form a crystalline halide salt of CuI that is highly insoluble in wastewater. The biocatalytic crystallization of radioiodine is a promising way to remove radioiodine in a great capacity with robust growth momentum, further ensuring its long-term stability through nuclear I(-) fixation via microcrystal formation.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Lee SY,Lee JY,Min JH,Kim SS,Baik MH,Chung SY,Lee M,Lee Y

doi

10.1038/srep28113

subject

Has Abstract

pub_date

2016-06-17 00:00:00

pages

28113

issn

2045-2322

pii

srep28113

journal_volume

6

pub_type

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