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DatoValore
TitleEx situ remediation of polluted soils by absorptive polymers, and acomparison of slurry and two-phase partitioning bioreactors forultimate contaminant degradation
AbstracttThe present study has provided a comparison between a conventional ex situ method for the treatmentof contaminated soil, a soil slurry bioreactor, with a novel technology in which a contaminant is rapidlyand effectively removed from the soil by means of absorptive polymer beads, which are then added to atwo-phase partitioning bioreactor (TPPB) for biodegradation of the target molecule. 4-nitrophenol (4NP)was selected as a model contaminant, being representative of a large class of xenobiotics, and the DuPontthermoplastic HytrelTM8206 was utilized for its extraction from soil over ranges of soil contaminationlevel, soil moisture content, and polymer:soil ratios. Since the polymers were able to rapidly (up to77% and 85% in 4 and 24 h respectively) and selectively remove the contaminant, the soil retained itsnutrient and microflora content, which is in contrast to soil washing which can remove these valuablesoil resources. After 4 h of reaction time, the TPPB system demonstrated removal efficiency four timeshigher (77% vs 20%) than the slurry system, with expected concomitant savings in time and energy. Avolumetric removal rate of 75 mg4NP h-1L-1was obtained in the TPPB, significantly greater than thevalue of 1.7 obtained in the slurry bioreactor. The polymers were readily regenerated for subsequentreuse, demonstrating the versatility of the polymer-based soil treatment technology.
SourceJournal of hazardous materials (Print) 262, pp. 31–37
KeywordsEx situ soil bioremediationAbsorptive polymersTwo-phase partitioning bioreactors
JournalJournal of hazardous materials (Print)
EditorElsevier, New York ;, Paesi Bassi
Year2013
TypeArticolo in rivista
Authors1)Tomei M.C., 1)Mosca Angelucci D., 2)Annesini M.C., 3)Daugulis A.J
Text272676 2013 Ex situ soil bioremediation Absorptive polymers Two phase partitioning bioreactors Ex situ remediation of polluted soils by absorptive polymers, and acomparison of slurry and two phase partitioning bioreactors forultimate contaminant degradation 1 Tomei M.C., 1 Mosca Angelucci D., 2 Annesini M.C., 3 Daugulis A.J 1 Water Research Institute, C.N.R., Via Salaria km 29.300, Monterotondo Scalo, 00015 Rome, Italy 2 Department of Chemical Engineering Materials and Environment, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy 3 Department of Chemical Engineering, Queen s University, Kingston, Ontario, Canada K7L 3N6h tThe present study has provided a comparison between a conventional ex situ method for the treatmentof contaminated soil, a soil slurry bioreactor, with a novel technology in which a contaminant is rapidlyand effectively removed from the soil by means of absorptive polymer beads, which are then added to atwo phase partitioning bioreactor TPPB for biodegradation of the target molecule. 4 nitrophenol 4NP was selected as a model contaminant, being representative of a large class of xenobiotics, and the DuPontthermoplastic HytrelTM8206 was utilized for its extraction from soil over ranges of soil contaminationlevel, soil moisture content, and polymer soil ratios. Since the polymers were able to rapidly up to77% and 85% in 4 and 24 h respectively and selectively remove the contaminant, the soil retained itsnutrient and microflora content, which is in contrast to soil washing which can remove these valuablesoil resources. After 4 h of reaction time, the TPPB system demonstrated removal efficiency four timeshigher 77% vs 20% than the slurry system, with expected concomitant savings in time and energy. Avolumetric removal rate of 75 mg4NP h 1L 1was obtained in the TPPB, significantly greater than thevalue of 1.7 obtained in the slurry bioreactor. The polymers were readily regenerated for subsequentreuse, demonstrating the versatility of the polymer based soil treatment technology. 262 Published version Articolo in rivista Elsevier 0304 3894 Journal of hazardous materials Print Journal of hazardous materials Print J. hazard. mater. Print Journal of hazardous materials. Print domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico