Publication: Bisphenol A removal by the Dracaena plant and the role of plant-associating bacteria
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Issued Date
2010-06-01
Resource Type
ISSN
03043894
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2-s2.0-77951498763
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Hazardous Materials. Vol.178, No.1-3 (2010), 777-785
Suggested Citation
S. Saiyood, A. S. Vangnai, P. Thiravetyan, D. Inthorn Bisphenol A removal by the Dracaena plant and the role of plant-associating bacteria. Journal of Hazardous Materials. Vol.178, No.1-3 (2010), 777-785. doi:10.1016/j.jhazmat.2010.02.008 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/29133
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Title
Bisphenol A removal by the Dracaena plant and the role of plant-associating bacteria
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Abstract
Dracaena sanderiana and Dracaena fragrans plants, as representatives of native, tropical, evergreen plants with fibrous root systems, were evaluated for bisphenol A (BPA) tolerance and uptake capability. D. sanderiana demonstrated significantly higher BPA removal capability than D. fragrans. Therefore, it was chosen for further study. D. sanderiana tolerated BPA toxicity levels up to 80μM, while higher BPA concentrations damaged the plant. In the sterile hydroponic system with an initial BPA concentration of 20μM, the plant could uptake approximately 50% of the BPA. The plant's ability to translocate BPA was confirmed by the detection of BPA that accumulated at the roots and stems, but not at the leaves of the plant. Upon BPA exposure, the D. sanderiana secreted extracellular plant mucilage as a protective barrier to the toxic compound. In the non-sterile treatment, the BPA dissipation was contributed not only by the D. sanderiana plant, but also by the co-existing microbes. The BPA reached 85% of the initial concentration at 20μM. Among the six plant-associating bacterial isolates, Bacillus cereus strain BPW4 and Enterobacter sp. strain BPW5 colonized the D. sanderiana root surface and facilitated BPA dissipation in the hydroponic treatment system. In addition, the success of the BPA treatment in the hazardous waste landfill leachate demonstrated the potential application of D. sanderiana plant in the phytoremediation of BPA contaminated wastewater or industrial leachate. © 2010 Elsevier B.V.