Comparison of Hexavalent Chromium Leaching Levels of Zeoliteand Slag-based Concretes

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Abstract

In this experiment, the reference concrete samples containing Portland cement as binder and the concrete samples with the addition of ground granulated blast furnace slag (85% and 95%, respectively as replacement of Portland cement) and other samples containing ground zeolite (8% and 13%, respectively as replacement of Portland cement) were analyzed regarding the leachability of chromium. The prepared concrete samples were subjected to long-term leaching test for 300 days in three different leaching agents (distilled water, rainwater and Britton-Robinson buffer). Subsequently, the concentration of hexavalent chromium in the various leachates spectrophotometrically was measured. The leaching parameters as values of the pH and the conductivity were also studied. This experiment clearly shows the need for the regulation and control of the waste addition to the construction materials and the need for long-term study in relation to the leaching of heavy metals into the environment.

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  • [1] Baker P. G. & Bishop P. L. (1997). Prediction of metal leaching rates from solidified/stabilized wastes using the shrinking unreacted core leaching procedure. Journal of Hazardous Materials.52 311-333. DOI: 10.1016/S0304-3894(96)01814-6.

  • [2] Douglas E. & Brandstetr J. (1990). A preliminary study on the alkali activation of ground granulated blast-furnace slag. Cement and Concrete Research. 20 (5) 746-756. DOI: 10.1016/0008-8846(90)90008-L.

  • [3] Salman M. Cizer Ö. Pontikes Y. Snellings R. Vandewalle L. Blanpain B. & Balen K.V. (2015). Cementitious binders from activated stainless steel refining slag and the effect of alkali solutions. Journal of Hazardous Materials 286 (9) 211-219. DOI: 10.1016/j.jhazmat.2014.12.046.

  • [4] Karakurt C. & Topçu İ. B. (2012). Effect of blended cements with natural zeolite and industrial by-products on rebar corrosion and high temperature resistance of concrete.Construction and Building Materials. 35 906-911. DOI: 10.1016/j.conbuildmat.2012.04.045.

  • [5] Najimi M. Sobhani J. Ahmadi B. & Shekarchi M. (2012). An experimental study on durability properties of concrete containing zeolite as a highly reactive natural pozzolan. Construction and Building Materials.35 1023-1033. DOI: 10.1016/j.conbuildmat.2012.04.038.

  • [6] Qasrawi H. (2014). The use of steel slag aggregate to enhance the mechanical properties of recycled aggregate concrete and retain the environment. Construction and Building Materials. 54 298-304. DOI: 10.1016/j.conbuildmat.2013.12.063.

  • [7] Dokou Z. Karagiorgi V. Karatzas G. P. Nikolaidis N. P. & Kalogerakis N. (2016). Large scale groundwater flow and hexavalent chromium transport modeling under current and future climatic conditions: the case of Asopos River Basin. Environ SciPollut Res Int. 23 (6) 5307-5321. DOI: 10.1007/s11356-015-5771-1.

  • [8] Ikeda M. Otsuki N. Nishida T. & Minagawa H. (2004). Influence of Type of Cement on Ca Leaching from Concrete Using Experimental Acceleration Method. In 29th Conference on Our World in Concrete and Structures August 25-26 (296-304) Singapore: CI-PREMIER PTE LTD.

  • [9] Kovalčíková M. Oravec J. Eštoková A. & Luptáková A. (2016). Investigation of the precipitates on the concrete surface due to sulphate exposure. Selected Scientific Papers - Journal of Civil Engineering. 11 (2).

  • [10] Komonweeraket K. Cetin B. Aydilek A.H. Benson C.H. & Edil T.B. (2015). Effects of pH on the leaching mechanisms of elements from fly ash mixed soils. Fuel. 140 788-802. DOI: 10.1016/j.fuel.2014.09.068.

  • [11] Gwenzi W. & Mupatsi N.M. (2016). Evaluation of heavy metal leaching from coal ash-versus conventional concrete monoliths and debris. Waste Management. 49 114-123. DOI: 10.1016/j.wasman.2015.12.029.

  • [12] Tiwari M.K. Bajpai S. Dewangan U.K. & Tamrakar R.K. (2015). Suitability of leaching test methods for fly ash and slag: A review. Journal of Radiation Research and Applied Sciences. 8(4) 523-537. DOI: 10.1016/j.jrras.2015.06.003.

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