A tailored permeable reactive bio-barrier for in situ groundwater remediation : removal of 3-chlorophenol as a case study

The present study explored bacterial aerobic biodegradation of reduced carbon-contaminants (RCC) in a pilot system mimicking remediation of a saturated aquifer in a permeable reactive biobarrier (PRBB). Bioaugmentation was performed with a pure culture of Pseudomonas putida macro-encapsulated in a c...

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Veröffentlicht in:Environmental technology. - 1993. - 43(2022), 8 vom: 15. März, Seite 1200-1210
1. Verfasser: Miller, Efrat (VerfasserIn)
Weitere Verfasser: Menashe, Ofir, Dosoretz, Carlos G
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Permeable reactive biobarrriers bioaugmentation exogenous nutrients contamination groundwater remediation macro-encapsulation Chlorophenols Water Pollutants, Chemical 3-chlorophenol Z2Z7M2FTAD
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520 |a The present study explored bacterial aerobic biodegradation of reduced carbon-contaminants (RCC) in a pilot system mimicking remediation of a saturated aquifer in a permeable reactive biobarrier (PRBB). Bioaugmentation was performed with a pure culture of Pseudomonas putida macro-encapsulated in a cellulose-acetate porous envelope and integrated transversely to the flow trajectory of the fluid in the biobarrier and compared with controls without capsules. The macro-encapsulation technique applied allowed the incorporation of a built-in nutrient core for the slow release of macronutrients, i.e. N, P, instead of exogenous nutrients supply. 3-Chlorophenol (3CP) at a concentration range of 350-500 mg/L was chosen as an RCC model compound. The findings indicate efficient 3CP biodegradation during the PRBB operation with a similar degree of transformation (76 ± 2% and 72 ± 2%) and mineralization (55 ± 4% vs. 49 ± 3%) for exogenous and built-in nutrients supply, respectively. The extent of dechlorination in both cases (54 ± 10% vs. 40 ± 2%, respectively) followed mineralization rather than transformation, suggesting that Cl- release took place in late transformation stages. Negligible decontamination was observed in the control system without bioaugmentation. Concluding, tailored PRBB with macro-capsules incorporating a built-in nutrient core to support bacterial growth presents a significant environmental advantage controlling excess nutrients release required in bioremediation of oligotrophic systems 
650 4 |a Journal Article 
650 4 |a Permeable reactive biobarrriers 
650 4 |a bioaugmentation 
650 4 |a exogenous nutrients contamination 
650 4 |a groundwater remediation 
650 4 |a macro-encapsulation 
650 7 |a Chlorophenols  |2 NLM 
650 7 |a Water Pollutants, Chemical  |2 NLM 
650 7 |a 3-chlorophenol  |2 NLM 
650 7 |a Z2Z7M2FTAD  |2 NLM 
700 1 |a Menashe, Ofir  |e verfasserin  |4 aut 
700 1 |a Dosoretz, Carlos G  |e verfasserin  |4 aut 
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