Abstract
Dry detoxification is a major technology used at the industrial scale for remediation of chromium slag. However, the mechanism of this reaction is poorly known, in particular the kinetics and the role of minerals. Here, we studied elemental and mineralogical compositions during chromium slag detoxification by carbon monoxide, using data from X-ray powder diffraction, electron backscattered diffraction, energy-dispersive spectrometry and chemical analysis. The detoxification kinetics were studied by thermal analysis techniques using thermogravimetric and differential thermogravimetric analysis. Results show that the decomposition of Cr(VI)-containing minerals is responsible for the reduction process. The apparent activation energy is 41.36 kJ mol−1, from a calculation using the Flynn–Wall–Ozawa iso-conversional method.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
