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Chrysotile asbestos detoxification with a combined treatment of oxalic acid and silicates producing amorphous silica and biomaterial

Valouma Aikaterini, Verganelaki Anastasia, Maravelaki Pagona, Gidarakos Evaggelos

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URIhttp://purl.tuc.gr/dl/dias/753842FE-A124-4BA8-B55B-DC288341FE77-
Identifierhttps://www.sciencedirect.com/science/article/pii/S0304389415302363?via%3Dihub-
Identifierhttps://doi.org/10.1016/j.jhazmat.2015.11.036-
Languageen-
Extent7 pagesen
TitleChrysotile asbestos detoxification with a combined treatment of oxalic acid and silicates producing amorphous silica and biomaterialen
CreatorValouma Aikaterinien
CreatorΒαλουμα Αικατερινηel
CreatorVerganelaki Anastasiaen
CreatorΒεργανελακη Αναστασιαel
CreatorMaravelaki Pagonaen
CreatorΜαραβελακη Παγωναel
CreatorGidarakos Evaggelosen
CreatorΓιδαρακος Ευαγγελοςel
PublisherElsevieren
Content SummaryThis study was primarily imposed by the ever increasing need for detoxification of asbestos and asbestos containing materials (ACM), with potential application onsite. The present work investigates potential detoxification of pure chrysotile (Chr) asbestos via a combined treatment of oxalic acid dihydrate (Oxac) (Η2C2Ο4·2Η2Ο) with silicates, such as tetraethoxysilane (TEOS) (SiH20C8O4) and pure water glass (WG) (potassium silicate) (K2SiO3). These reagents used in the experimental procedure, do not cause adverse effects on the environment and are cost effective. The results of FTIR, XRD, optical and scanning microscopy coupled with EDS analyses indicated that all of the applied treatments destructed the Chr structure and yielded silica of amorphous phase and the biomaterial glushinskite from the Oxac reacted with brucite [Mg(OH)2] layer. Each of the proposed formulations can be applied for the detoxification of asbestos, according to priorities related to the specific products of the recovery treatment. Therefore, Oxac acid leaching followed by the TEOS addition is preferred in cases of glushinskite recovery; TEOS treatment of asbestos with subsequent Oxac addition produced amorphous silica production; finally Oxac acid leaching followed by WG encapsulated the asbestos fibers and can be used in cases of onsite asbestos and ACM detoxification.el
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2018-10-19-
Date of Publication2016-
SubjectAmorphous silicaen
SubjectChrysotile asbestosen
SubjectMagnesium oxalateen
SubjectOxalic aciden
SubjectTEOSen
Bibliographic CitationA. Valouma, A. Verganelaki, P. Maravelaki-Kalaitzaki and E. Gidarakos, "Chrysotile asbestos detoxification with a combined treatment of oxalic acid and silicates producing amorphous silica and biomaterial," J. Hazard. Mater., vol. 305, pp. 164-170, Mar. 2016. doi: 10.1016/j.jhazmat.2015.11.036en

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