Chromium-Leaching Study of Cements in Various Environments
Cement is a basic material used for building construction. Chromium as an indelible non-volatile 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, Britton-Robinson 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 mg/kg. The content of dissolved hexavalent chromium ranged 0.23-3.19, 2.0-5.78 and 8.88-16.25 mg/kg in deionized water, Britton-Robinson solution and hydrochloric acid, respectively. The calculated leachable fraction of Cr(VI) from cement samples was observed in the range 0.1--7.58 %.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1124696Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 908
 R. Roskovic, I. S. Oslakovic, J. Radic, and M. Serdar, "Effects of chromium (VI) reducing agents in cement on corrosion of reinforcing steel," Cement and Concrete Composites, vol. 33, pp. 1020-1025, 2011.
 G. Laforest and J. Duchesne, "Immobilization of chromium (VI) evaluated by binding isotherms for ground granulated blast furnace slag and ordinary Portland cement," Cement and Concrete Research, vol. 35, pp. 2322-2332, 2005.
 M. Frías and M. I. Sánchez de Rojas, "Total and soluble chromium, nickel and cobalt content in the main materials used in the manufacturing of Spanish commercial cements," Cement and Concrete Research, vol. 32, no. 3, pp. 435-440, 2002.
 B. J. Wang, J. D. Wu, S. C. Sheu, T. S. Shih, H. Y. Chang, Y. L. Guo, Y. J. Wang and T. C. Chou, "Occupational hand dermatitis among cement workers in Taiwan," Journal of the Formosan Medical Association, vol. 110, pp. 775-779, 2011.
 S. Eugeniusz, "Chromium in Portland cement," Cement wapno gips, vol. 1, pp. 1-16, 1985.
 J.E. Wahlberg, G. Lindesedt and O. Einarsson, "Chromium, cobalt and nickel in Swedish cement, detergent, mould and cutting oils," Berufs-Dermatosen, vol. 25, pp. 220-228, 1977.
 R. Tandon and B. Aarts, "Chromium, nickel and cobalt contents of some Australian cements," Contact Dermatits, vol. 28, pp. 201-205, 1993.
 S. Potgieter, N. Panichev, J. H. Potgieter and S. Panicheva, "Determination of hexavalent chromium in South African cements and cement-related materials with electrothermal atomic absorption spectrometry," Cement and Concrete Research, vol. 33, no. 10, pp. 1589-1593, 2003.
 O. Yamaguchi, M. Ida, Y. Uchiyama and S. Hanehara, "A method for the determination of total Cr(VI) in cement," Journal of the European Ceramic Society, vol. 26, no. 5, pp. 785-790, 2006.
 N. Bentaieb, A. Lachemet, R. Zirour, S. Belaadi and C. Frances, "Thermal analysis of composite cements," Chemical Engineering Transactions, vol. 24, pp. 685-690, 2011.
 Q. Yu, S. Nagataki, L. Jinmei, T. Saeki and M. Hisada, "The leachability of heavy metals in hardened fly ash cement and cement-solidified fly ash," Cement and Concrete Research, vol. 35, no. 6, pp. 1056-1063, 2005.
 STN EN 196-10: 2007 Methods of testing cement. Part 10: Determination of the water soluble chromium (VI) content of cement, Slovak Standard Institute, Bratislava, Slovak Republic (in Slovak).
 H. T. K. Britton, R. A. Robinson, "CXCVIII—Universal buffer solutions and the dissociation constant of veronal," Journal of Chemical Society, pp. 1456-1462, 1936.
 H. K. Lam, J. P. Barford and G. McKay, "Utilization of incineration waste ash residues as Portland cement clinker," Chemical Engineering Transactions, vol. 21, 2010.
 M. Kropáček, "Evaluation of stability of the properties of cements with time," Students scientific conference, Technical University of Ostrava, Facilty of Civil Engineering, p. 21, 2013. (in Czech)
 European Commission. "Reference Documents on Best Available Techniques in the Cement, Lime and Magnesium Oxide Manufacturing Industrie," May 2010. 2010-10-22. available on URL
 Ministry of Economy of the Slovak Republic. Notice no. 275/2004 "Collection of Laws amending and supplementing Decree of the Ministry of Economy of the Slovak Republic No. 67/2002 Collection of Laws," establishing a list of selected chemicals and selected chemical appliance, where the marketing and use is limited or prohibited according to Decree No. 180/2003 Collection of Laws. Slovak republic.