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Magnesium oxide production from chrysotile asbestos detoxification with oxalic acid treatment

Valouma Aikaterini, Verganelaki Anastasia, Tetoros Ioannis, Maravelaki Pagona-Noni, Gidarakos Evaggelos

Πλήρης Εγγραφή


URI: http://purl.tuc.gr/dl/dias/74244B3A-7CBF-44C6-9371-B1140A98433B
Έτος 2017
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
Άδεια Χρήσης
Λεπτομέρειες
Βιβλιογραφική Αναφορά A. Valouma, A. Verganelaki, I. Tetoros, P. Maravelaki-Kalaitzaki and E. Gidarakos, "Magnesium oxide production from chrysotile asbestos detoxification with oxalic acid treatment," J. Hazard. Mater., vol. 336, pp. 93-100, Aug. 2017. doi: 10.1016/j.jhazmat.2017.04.019 https://doi.org/10.1016/j.jhazmat.2017.04.019
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Περίληψη

This article describes the detoxification of pure chrysotile (Chr) asbestos by following an acid leaching treatment with oxalic acid dihydrate (Oxac) (H2C2O4·2H2O). Oxac was chosen due to its low environmental impact (or toxicity) and cost. We demonstrate the effectiveness of different concentrations of Oxac as proposed formulations. The results from FTIR, XRD and optical microscopy analyses indicated that all the applied treatments destructed the Chr structure while a new biomaterial, Glushinskite (Gls) was formed by the reaction between Oxac with the outer Brucite (Brc) (MgO2) layer surface of Chr. Oxac 0.05 M was selected as the optimal concentration for an eight-day treatment for the detoxification. The heating of the supernatant of the above-treated solution at 480 °C, yielded MgO in a considerable concentration (8.29% w/w). According to the energy consumption study the whole applied procedure is viable with an economic profit up to 4.3% and a low cost method of detoxification on the operation of a potential asbestos waste management site.

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