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DatoValore
TitleCoupled Adsorption and Biodegradation of Trichloroethylene on Biochar from Pine Wood Wastes: A Combined Approach for a Sustainable Bioremediation Strategy
AbstractTowards chlorinated solvents, the effectiveness of the remediation strategy can be improved by combining a biological approach (e.g., anaerobic reductive dechlorination) with chemical/physical treatments (e.g., adsorption). A coupled adsorption and biodegradation (CAB) process for trichloroethylene (TCE) removal is proposed in a biofilm-biochar reactor (BBR) to assess whether biochar from pine wood (PWB) can support a dechlorinating biofilm by combining the TCE (100 µM) adsorption. The BBR operated for eight months in parallel with a biofilm reactor (BR)--no PWB (biological process alone), and with an abiotic biochar reactor (ABR)--no dechlorinating biofilm (only an adsorption mechanism). Two flow rates were investigated. Compared to the BR, which resulted in a TCE removal of 86.9 ± 11.9% and 78.73 ± 19.79%, the BBR demonstrated that PWB effectively adsorbs TCE and slows down the release of its intermediates. The elimination of TCE was quantitative, with 99.61 ± 0.79% and 99.87 ± 0.51% TCE removal. Interestingly, the biomarker of the reductive dechlorination process, Dehalococcoides mccartyi, was found in the BRR (9.2 × 105 16S rRNA gene copies/g), together with the specific genes tceA, bvcA, and vcrA (8.16 × 106, 1.28 × 105, and 8.01 × 103 gene copies/g, respectively). This study suggests the feasibility of biochar to support the reductive dechlorination of D. mccartyi, opening new frontiers for field-scale applications.
SourceMicroorganisms 10 (1)
KeywordsbioremediationDehalococcoides mccartyibiodegradationreductive dechlorinationbiocharadsorption
JournalMicroorganisms
EditorMolecular Diversity Preservation International, Basel,
Year2022
TypeArticolo in rivista
DOI10.3390/microorganisms10010101
AuthorsMarta M. Rossi, Bruna Matturro, Neda Amanat, Simona Rossetti, Marco Petrangeli Papini
Text461964 2022 10.3390/microorganisms10010101 bioremediation Dehalococcoides mccartyi biodegradation reductive dechlorination biochar adsorption Coupled Adsorption and Biodegradation of Trichloroethylene on Biochar from Pine Wood Wastes A Combined Approach for a Sustainable Bioremediation Strategy Marta M. Rossi, Bruna Matturro, Neda Amanat, Simona Rossetti, Marco Petrangeli Papini Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy Water Research Institute IRSA CNR , Via Salaria km 29.300, 00015 Monterotondo, Italy Towards chlorinated solvents, the effectiveness of the remediation strategy can be improved by combining a biological approach e.g., anaerobic reductive dechlorination with chemical/physical treatments e.g., adsorption . A coupled adsorption and biodegradation CAB process for trichloroethylene TCE removal is proposed in a biofilm biochar reactor BBR to assess whether biochar from pine wood PWB can support a dechlorinating biofilm by combining the TCE 100 µM adsorption. The BBR operated for eight months in parallel with a biofilm reactor BR no PWB biological process alone , and with an abiotic biochar reactor ABR no dechlorinating biofilm only an adsorption mechanism . Two flow rates were investigated. Compared to the BR, which resulted in a TCE removal of 86.9 ± 11.9% and 78.73 ± 19.79%, the BBR demonstrated that PWB effectively adsorbs TCE and slows down the release of its intermediates. The elimination of TCE was quantitative, with 99.61 ± 0.79% and 99.87 ± 0.51% TCE removal. Interestingly, the biomarker of the reductive dechlorination process, Dehalococcoides mccartyi, was found in the BRR 9.2 × 105 16S rRNA gene copies/g , together with the specific genes tceA, bvcA, and vcrA 8.16 × 106, 1.28 × 105, and 8.01 × 103 gene copies/g, respectively . This study suggests the feasibility of biochar to support the reductive dechlorination of D. mccartyi, opening new frontiers for field scale applications. 10 Published version https //www.mdpi.com/2076 2607/10/1/101/htm Rossi et al., 2022 Rossi et al., 2022 microorganisms 10 00101.pdf Articolo in rivista Molecular Diversity Preservation International 2076 2607 Microorganisms Microorganisms simona.rossetti ROSSETTI SIMONA bruna.matturro MATTURRO BRUNA