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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
EN
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| URI: | http://purl.tuc.gr/dl/dias/E760B39A-2975-4CAB-9FBC-8EF898D441B7 | ||
| Year | 2014 | ||
| Type of Item | Doctoral Dissertation | ||
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| Bibliographic Citation | Γεώργιος Μπαζδάνης, "Απομάκρυνση επικίνδυνων ρυπαντών από υγρά απόβλητα με χρήση διαπερατών ενεργών φραγμών", Διδακτορική Διατριβή, Πολυτεχνείο Κρήτης: Σχολή Μηχανικών Ορυκτών Πόρων, Χανιά, Ελλάς, 2014 https://doi.org/10.26233/heallink.tuc.23957 | ||
| Appears in Collections |
In the present study, the efficiency of permeable reactive barriers (PRBs) containing organic material mixed with zero-valent iron, fly ash or red mud to remove heavy metals from leachates was assessed. Upflow laboratory column experiments were carried out to assess system efficiency in terms of Cu, Zn, Ni and Mn removal. The initial concentration of each metal ion in the feed was 50 mg/L. The present study also explores the potential of composite permeable reactive barriers containing organic material and elemental sulphur for the clean up ofcontaminated plumes containing Cr(VI) and acetate. Elemental sulphur acts as electron acceptor while acetate as electron donor and carbon source. The study also aims to identify the main mechanisms involved in the removal of Cr(VI). Experiments were carried out in laboratory plexiglas columns, with a diameter of 5 cm and length of 50 cm. The feed contained 10 mg.L-1 Cr(VI) and COD (0.6 or 6 g.L-119 ). COD enhances the production of hydrogen sulphide within the reactive bed which in turn causes the reduction of Cr(VI). Under the optimum experimental setup, the PRB exhibited excellent Cr(VI) reduction potential over a period of 420 days. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectrometry (EDS) as well as Fourier Transform Infrared Spectroscopy (FTIR) were used to characterize the exhaustive reactive material and identify newly formed mineral phases.
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