Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Regeneration strategies of polymers employed in ex-situ remediation of contaminated soil: Bioregeneration versus solvent extraction. |
| Abstract | In this study we evaluated the feasibility of two regeneration strategies of contaminated polymers employed for ex-situ soil remediation in a two-step process. Soil decontamination is achieved by sorption of the pollutants on the polymer beads, which are regenerated in a subsequent step. Tested soil was contaminated with a mixture of 4-chlorophenol and pentachlorophenol, and a commercial polymer, Hytrel, has been employed for extraction. Removal efficiencies of the polymer-soil extraction are in the range of 51-97% for a contact time <= 24 h. Two polymer regeneration strategies, solvent extraction and biological regeneration (realized in a two-phase partitioning bioreactor), were tested and compared. Performance was assessed in terms of removal rates and efficiencies and an economic analysis based on the operating costs has been performed. Results demonstrated the feasibility of both regeneration strategies, but the bioregeneration was advantageous in that provided the biodegradation of the contaminants desorbed from the polymer. Practically complete removal for 4-chlorophenol and up to 85% biodegradation efficiency for pentachlorophenol were achieved. Instead, in the solvent extraction, a relevant production (184-831 L kg(pol)(-1)) of a highly polluted stream to be treated or disposed of is observed. The cost analysis of the two strategies showed that the bioregeneration is much more convenient with operating costs of 12 /kg(pol) i.e. more than one order of magnitude lower in comparison to 233 /kg(pol) of the solvent extraction. |
| Source | Journal of environmental management 159, pp. 169–177 |
| Keywords | Ex-situ soil remediationChlorophenolsTwo-phase partitioning bioreactorsPolymer regenerationBio-regenerationTechnical-economic analysis |
| Journal | Journal of environmental management |
| Editor | Academic Press., New York, Regno Unito |
| Year | 2015 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.jenvman.2015.05.018 |
| Authors | Mosca Angelucci Domenica; Tomei M Concetta |
| Text | 339918 2015 10.1016/j.jenvman.2015.05.018 ISI Web of Science WOS WOS 000357908000020 Scopus 2 s2.0 84936147592 Ex situ soil remediation Chlorophenols Two phase partitioning bioreactors Polymer regeneration Bio regeneration Technical economic analysis Regeneration strategies of polymers employed in ex situ remediation of contaminated soil Bioregeneration versus solvent extraction. Mosca Angelucci Domenica; Tomei M Concetta Water Research Institute, C.N.R., Via Salaria km 29.300, CP 10, 00015, Monterotondo Stazione, Rome, Italy In this study we evaluated the feasibility of two regeneration strategies of contaminated polymers employed for ex situ soil remediation in a two step process. Soil decontamination is achieved by sorption of the pollutants on the polymer beads, which are regenerated in a subsequent step. Tested soil was contaminated with a mixture of 4 chlorophenol and pentachlorophenol, and a commercial polymer, Hytrel, has been employed for extraction. Removal efficiencies of the polymer soil extraction are in the range of 51 97% for a contact time <= 24 h. Two polymer regeneration strategies, solvent extraction and biological regeneration realized in a two phase partitioning bioreactor , were tested and compared. Performance was assessed in terms of removal rates and efficiencies and an economic analysis based on the operating costs has been performed. Results demonstrated the feasibility of both regeneration strategies, but the bioregeneration was advantageous in that provided the biodegradation of the contaminants desorbed from the polymer. Practically complete removal for 4 chlorophenol and up to 85% biodegradation efficiency for pentachlorophenol were achieved. Instead, in the solvent extraction, a relevant production 184 831 L kg pol 1 of a highly polluted stream to be treated or disposed of is observed. The cost analysis of the two strategies showed that the bioregeneration is much more convenient with operating costs of 12 /kg pol i.e. more than one order of magnitude lower in comparison to 233 /kg pol of the solvent extraction. 159 Published version https //biblioproxy.cnr.it 2114/science/article/pii/S0301479715300700 via%3Dihub Regeneration strategies of polymers employed in ex situ remediation of contaminated soil bioregeneration versus solvent extraction Pdf dell articolo Regeneration strategies of polymers employed in ex situ remediation of contaminated soil bioregeneration versus solvent extraction JEMA2015_Regeneration strategies.pdf Articolo in rivista Academic Press. 0301 4797 Journal of environmental management Journal of environmental management J. environ. manag. domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico |