Abstract
The endophyte Pseudomonas sp. XNN8 was separated from Typha orientalis which can secrete indole-3-acetic acid and 1-aminocyclopropane-1-carboxylate deaminase and siderophores and has strong resistance to uranium it was then colonized in the Syngonium podophyllum; and the S. podophyllum-Pseudomonas sp. XNN8 symbiotic purification system (SPPSPS) for uranium-containing wastewater was constructed. Afterwards, the hydroponic experiments to remove uranium from uranium-containing wastewater by the SPPSPS were conducted. After 24 days of treatment, the uranium concentrations of the wastewater samples with uranium concentrations between 0.5 and 5.0 mg/L were lowered to below 0.05 mg/L. Furthermore, the uranium in the plants was assayed using Fourier transform infrared spectroscopy (FTIR) and extended X-ray absorption fine structure (EXAFS) spectroscopy. The Pseudomonas sp. XNN8 was found to generate substantial organic groups in the roots of the Syngonium podophyllum, which could improve the complexing capability of S. podophyllum for uranium. The uranium in the roots of S. podophyllum was found to be the uranyl phosphate (47.4 %) and uranyl acetate (52.6 %).
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Acknowledgments
This research was supported by the Defense Industrial Technology Development Program (B3720132001), National Natural Science Foundation of China (Grant No. U1401231, 11305087, and 11505093), Science and Technology Department of Hunan China Industrial Support projects (Grant No. 2014GK3120).
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Responsible editor: Robert Duran
Qin-wen Deng and Yong-dong Wang contributed equally to this work.
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Deng, Qw., Wang, Yd., Ding, Dx. et al. Construction of the Syngonium podophyllum-Pseudomonas sp. XNN8 Symbiotic Purification System and Investigation of Its Capability of Remediating Uranium Wastewater. Environ Sci Pollut Res 24, 5134–5143 (2017). https://doi.org/10.1007/s11356-016-6392-z
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DOI: https://doi.org/10.1007/s11356-016-6392-z