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Biocatalytic dechlorination of hexachlorocyclohexane by immobilized bio-Pd in a pilot scale fluidized bed reactor

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Biotechnology for a sustainable economy (Bio-Economy)
Abstract
Lindane (gamma-hexachlorocyclohexane, gamma-HCH) is a recalcitrant and toxic organochlorine insecticide. Due to its non-selective production process and widespread use, HCH isomers and their degradation products have been detected frequently in soils and groundwater. An innovative technology using microbial produced Pd(0) nanoparticles, i.e. bio-Pd, was developed to treat groundwater containing a mixture of HCHs and chlorobenzenes. In a first step, the groundwater was de-ironized and most of the chlorobenzenes were removed in a biological trickling filter. The mu g L(-1) levels of HCHs and chlorobenzenes were removed in a second step by the bio-Pd-based technology. Therefore, a 200-L pilot scale reactor was developed with 100 mg L(-1) bio-Pd encapsulated in alginate beads. Hydrogen gas was bubbled at the bottom of the reactor and served to charge the bio-Pd catalyst. The reactor influent contained 5.2 mu g L(-1) HCHs and 51.1 mu g L(-1) chlorobenzenes. During a test period of 10 days, 29% of the HCH isomers and 63% of the chlorobenzenes were removed applying a nominal hydraulic residence time of 4 h. These removal percentages could be increased to 75 and 68% by doubling the nominal hydraulic residence time to 8 h. This study demonstrated that biologically produced nanoparticles of Pd can be applied for the large-scale remediation of groundwater contaminated with HCHs.
Keywords
Hexachlorocyclohexane, Chlorobenzenes, Nanomaterials, Pump and treat, Dechlorination, Palladium, SHEWANELLA-ONEIDENSIS, IRON NANOPARTICLES, PALLADIUM, LINDANE, DEGRADATION, SULFUR, HYDRODECHLORINATION, TRICHLOROETHYLENE, PERMANGANATE, GROUNDWATER

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Citation

Please use this url to cite or link to this publication:

Chicago
Hennebel, Tom, Henri Simoen, Pieter Verhagen, Wim De Windt, Jan Dick, Christian Weise, Frank Pietschner, Nico Boon, and Willy Verstraete. 2011. “Biocatalytic Dechlorination of Hexachlorocyclohexane by Immobilized bio-Pd in a Pilot Scale Fluidized Bed Reactor.” Environmental Chemistry Letters 9 (3): 417–422.
APA
Hennebel, T., Simoen, H., Verhagen, P., De Windt, W., Dick, J., Weise, C., Pietschner, F., et al. (2011). Biocatalytic dechlorination of hexachlorocyclohexane by immobilized bio-Pd in a pilot scale fluidized bed reactor. ENVIRONMENTAL CHEMISTRY LETTERS, 9(3), 417–422.
Vancouver
1.
Hennebel T, Simoen H, Verhagen P, De Windt W, Dick J, Weise C, et al. Biocatalytic dechlorination of hexachlorocyclohexane by immobilized bio-Pd in a pilot scale fluidized bed reactor. ENVIRONMENTAL CHEMISTRY LETTERS. 2011;9(3):417–22.
MLA
Hennebel, Tom, Henri Simoen, Pieter Verhagen, et al. “Biocatalytic Dechlorination of Hexachlorocyclohexane by Immobilized bio-Pd in a Pilot Scale Fluidized Bed Reactor.” ENVIRONMENTAL CHEMISTRY LETTERS 9.3 (2011): 417–422. Print.
@article{1983557,
  abstract     = {Lindane (gamma-hexachlorocyclohexane, gamma-HCH) is a recalcitrant and toxic organochlorine insecticide. Due to its non-selective production process and widespread use, HCH isomers and their degradation products have been detected frequently in soils and groundwater. An innovative technology using microbial produced Pd(0) nanoparticles, i.e. bio-Pd, was developed to treat groundwater containing a mixture of HCHs and chlorobenzenes. In a first step, the groundwater was de-ironized and most of the chlorobenzenes were removed in a biological trickling filter. The mu g L(-1) levels of HCHs and chlorobenzenes were removed in a second step by the bio-Pd-based technology. Therefore, a 200-L pilot scale reactor was developed with 100 mg L(-1) bio-Pd encapsulated in alginate beads. Hydrogen gas was bubbled at the bottom of the reactor and served to charge the bio-Pd catalyst. The reactor influent contained 5.2 mu g L(-1) HCHs and 51.1 mu g L(-1) chlorobenzenes. During a test period of 10 days, 29\% of the HCH isomers and 63\% of the chlorobenzenes were removed applying a nominal hydraulic residence time of 4 h. These removal percentages could be increased to 75 and 68\% by doubling the nominal hydraulic residence time to 8 h. This study demonstrated that biologically produced nanoparticles of Pd can be applied for the large-scale remediation of groundwater contaminated with HCHs.},
  author       = {Hennebel, Tom and Simoen, Henri and Verhagen, Pieter and De Windt, Wim and Dick, Jan and Weise, Christian and Pietschner, Frank and Boon, Nico and Verstraete, Willy},
  issn         = {1610-3653},
  journal      = {ENVIRONMENTAL CHEMISTRY LETTERS},
  keyword      = {Hexachlorocyclohexane,Chlorobenzenes,Nanomaterials,Pump and treat,Dechlorination,Palladium,SHEWANELLA-ONEIDENSIS,IRON NANOPARTICLES,PALLADIUM,LINDANE,DEGRADATION,SULFUR,HYDRODECHLORINATION,TRICHLOROETHYLENE,PERMANGANATE,GROUNDWATER},
  language     = {eng},
  number       = {3},
  pages        = {417--422},
  title        = {Biocatalytic dechlorination of hexachlorocyclohexane by immobilized bio-Pd in a pilot scale fluidized bed reactor},
  url          = {http://dx.doi.org/10.1007/s10311-010-0295-x},
  volume       = {9},
  year         = {2011},
}

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