| Title | Rapid and effective decontamination of chlorophenol-contaminated soil by sorption into commercial polymers: Concept demonstration and process modeling |
| Abstract | Solid phase extraction performed with commercial polymer beads to treat soil contaminated by chlorophenols (4-chlorophenol, 2,4-dichlorophenol and pentachlorophenol) as single compounds and in a mixture has been investigated in this study. Soil-water-polymer partition tests were conducted to determine the relative affinities of single compounds in soil-water and polymer-water pairs. Subsequent soil extraction tests were performed with Hytrel 8206, the polymer showing the highest affinity for the tested chlorophenols. Factors that were examined were polymer type, moisture content, and contamination level. Increased moisture content (up to 100%) improved the extraction efficiency for all three compounds. Extraction tests at this upper level of moisture content showed removal efficiencies >=70% for all the compounds and their ternary mixture, for 24 h of contact time, which is in contrast to the weeks and months, normally required for conventional ex situ remediation processes.A dynamic model characterizing the rate and extent of decontamination was also formulated, calibrated and validated with the experimental data. The proposed model, based on the simplified approach of "lumped parameters" for the mass transfer coefficients, provided very good predictions of the experimental data for the absorptive removal of contaminants from soil at different individual solute levels. Parameters evaluated from calibration by fitting of single compound data, have been successfully applied to predict mixture data, with differences between experimental and predicted data in all cases being <=3%. |
| Source | Journal of environmental management (Online) 150, pp. 81–91 |
| Keywords | CalibrationChlorophenolsEx-situ soil remediationPolymer extractionProcess modelingValidation |
| Journal | Journal of environmental management (Online) |
| Editor | Academic Press, London, Regno Unito |
| Year | 2015 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.jenvman.2014.11.014 |
| Authors | Tomei M.C.; Mosca Angelucci D.; Ademollo N.; Daugulis A.J. |
| Text | 302742 2015 10.1016/j.jenvman.2014.11.014 Scopus 2 s2.0 84911888861 Calibration Chlorophenols Ex situ soil remediation Polymer extraction Process modeling Validation Rapid and effective decontamination of chlorophenol contaminated soil by sorption into commercial polymers Concept demonstration and process modeling Tomei M.C.; Mosca Angelucci D.; Ademollo N.; Daugulis A.J. Water Research Institute, C.N.R., Via Salaria km 29.300, CP 10, Monterotondo Stazione, Rome, 00015, Italy; Department of Chemical Engineering, Queen s University, Kingston, ON, K7L 3N6, Canada Solid phase extraction performed with commercial polymer beads to treat soil contaminated by chlorophenols 4 chlorophenol, 2,4 dichlorophenol and pentachlorophenol as single compounds and in a mixture has been investigated in this study. Soil water polymer partition tests were conducted to determine the relative affinities of single compounds in soil water and polymer water pairs. Subsequent soil extraction tests were performed with Hytrel 8206, the polymer showing the highest affinity for the tested chlorophenols. Factors that were examined were polymer type, moisture content, and contamination level. Increased moisture content up to 100% improved the extraction efficiency for all three compounds. Extraction tests at this upper level of moisture content showed removal efficiencies >=70% for all the compounds and their ternary mixture, for 24 h of contact time, which is in contrast to the weeks and months, normally required for conventional ex situ remediation processes.A dynamic model characterizing the rate and extent of decontamination was also formulated, calibrated and validated with the experimental data. The proposed model, based on the simplified approach of lumped parameters for the mass transfer coefficients, provided very good predictions of the experimental data for the absorptive removal of contaminants from soil at different individual solute levels. Parameters evaluated from calibration by fitting of single compound data, have been successfully applied to predict mixture data, with differences between experimental and predicted data in all cases being <=3%. 150 http //www.scopus.com/inward/record.url eid=2 s2.0 84911888861 partnerID=q2rCbXpz Articolo in rivista Academic Press 1095 8630 Journal of environmental management Online Journal of environmental management Online J. environ. manag. Online Journal of environmental management Online domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA nicoletta.ademollo ADEMOLLO NICOLETTA mariaconcetta.tomei TOMEI MARIA CONCETTA |
