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Biogenic Nanopalladium based remediation of chlorinated hydrocarbons in marine environments
Hosseinkhani, B.; Hennebel, T.; Van Nevel, S.; Verschuere, S.; Yakimov, M.M.; Cappello, S.; Blaghen, M.; Boon, N. (2014). Biogenic Nanopalladium based remediation of chlorinated hydrocarbons in marine environments. Environ. Sci. Technol. 48(1): 550-557. dx.doi.org/10.1021/es403047u
In: Environmental Science and Technology. American Chemical Society: Easton. ISSN 0013-936X; e-ISSN 1520-5851, meer
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| Auteurs | | Top |
- Hosseinkhani, B., meer
- Hennebel, T., meer
- Van Nevel, S., meer
- Verschuere, S.
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- Yakimov, M.M.
- Cappello, S.
- Blaghen, M.
- Boon, N., meer
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| Abstract |
Biogenic catalysts have been studied over the last 10 years in freshwater and soil environments, but neither their formation nor their application has been explored in marine ecosystems. The objective of this study was to develop a biogenic nanopalladium-based remediation method for reducing chlorinated hydrocarbons from marine environments by employing indigenous marine bacteria. Thirty facultative aerobic marine strains were isolated from two contaminated sites, the Lagoon of Mar Chica, Morocco, and Priolo Gargallo Syracuse, Italy. Eight strains showed concurrent palladium precipitation and biohydrogen production. X-ray diffraction and thin section transmission electron microscopy analysis indicated the presence of metallic Pd nanoparticles of various sizes (5–20 nm) formed either in the cytoplasm, in the periplasmic space, or extracellularly. These biogenic catalysts were used to dechlorinate trichloroethylene in simulated marine environments. Complete dehalogenation of 20 mg L–1 trichloroethylene was achieved within 1 h using 50 mg L–1 biogenic nanopalladium. These biogenic nanoparticles are promising developments for future marine bioremediation applications. |
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