Adriana Estokova and Lenka Palascakova and Martina Kovalcikova
ChromiumLeaching Study of Cements in Various Environments
727 - 730
2016
10
6
International Journal of Civil and Environmental Engineering
https://publications.waset.org/pdf/10004626
https://publications.waset.org/vol/114
World Academy of Science, Engineering and Technology
Cement is a basic material used for building construction. Chromium as an indelible nonvolatile trace element of raw materials occurs in cement clinker in the trivalent or hexavalent form. Hexavalent form of chromium is harmful and allergenic having very high water solubility and thus can easily come into contact with the human skin. The paper is aimed at analyzing the content of total chromium in Portland cements and leaching rate of hexavalent chromium in various leachants Deionized water, BrittonRobinson buffer, used to simulate the natural environment, and hydrochloric acid (HCl). The concentration of total chromium in Portland cement samples was in a range from 173.2 to 218.5 mgkg. The content of dissolved hexavalent chromium ranged 0.233.19, 2.05.78 and 8.8816.25 mgkg in deionized water, BrittonRobinson solution and hydrochloric acid, respectively. The calculated leachable fraction of Cr(VI) from cement samples was observed in the range 0.17.58 .
Open Science Index 114, 2016