Abstract:
UNLABELLED:Staphylococcus aureus LZ-01 was isolated from the Yellow River upstream from Lanzhou which can resist and reduce chromium (VI) to chromium (III). In this study, strain LZ-01's uranium (VI) resistance and adsorption abilities were investigated. Our results showed that it can resist 2 mmol l(-1) U(VI) and adsorb 96% of 2 mmol l(-1) U(VI) after 6 h incubation. Transmission electron microscopy (TEM) images showed that precipitates were formed on the surface of the cells. Energy dispersive X-ray spectroscopy (EDX) analysis indicated that the precipitates contained uranium and phosphorus. The U(VI) adsorption rate of strain LZ-01 was promoted by 20 mmol l(-1) phosphate. It adsorbed 45% of 2·5 mmol l(-1) U(VI) in 30 min compared to 36% without phosphate (P < 0·05). Strain LZ-01 can resist heavy metals and survive in nuclear waste-contaminated environments. Strain LZ-01 might be a potential candidate for nuclear waste remediation with phosphate added. SIGNIFICANCE AND IMPACT OF THE STUDY:Staphylococcus aureus LZ-01 can resist 2 mmol l(-1) U(VI). It could adsorb more than 90% of the 2 mmol l(-1) U(VI) in 6 h. Uranium is precipitated with phosphorus on the surface of the cells. Phosphate promotes uranium adsorption in strain LZ-01, and its U(VI) adsorption capacity is related to its cell availability. These results indicate that the strain LZ-01 might be a potential candidate for remediation of nuclear waste when phosphate is added.
journal_name
Lett Appl Microbioljournal_title
Letters in applied microbiologyauthors
Zou L,Chen Z,Zhang X,Liu P,Li Xdoi
10.1111/lam.12310subject
Has Abstractpub_date
2014-11-01 00:00:00pages
528-34issue
5eissn
0266-8254issn
1472-765Xjournal_volume
59pub_type
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pub_type: 杂志文章
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journal_title:Letters in applied microbiology
pub_type: 杂志文章
doi:10.1046/j.1472-765x.1998.00406.x
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