ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The leather industry creates a large quantity of organic and inorganic wastecontaining chromium. This research examines stabilization of particulate tannery waste intype II Portland cement. Several clays, Brazilian polycationic smectite modified in laboratoryand commercial clays were used as additives with the aim of optimizing chromiumadsorption. Tannery waste was added in quantities of 10, 15 and 20% relative to cement mass.The solidification components were analyzed separately and in combination in the solidifiedmixes using X ray diffraction. The analysis showed that reactions between the waste and thecement occurred, and that the tannery waste modified the final compounds of the system.Calcium sulfate present in the waste increased ettringite formation. Chromium also reactedwith cement, since compounds with chromium and calcium were identified. Substitution ofaluminum and silicon by chromium was also observed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.478.pdf