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

Selected Scientific Papers: Journal of Civil Engineering

Oravec Jozef¹  Eštoková Adriana¹ 

[1] Technical University of Košice, Slovakia Faculty of Civil Engineering, Institute of Environmental Engineering, Košice, Slovakia;

关键词: hexavalent chromium;    leaching;    zeolite;    slag;    concrete;   

DOI  :  10.1515/sspjce-2017-0003

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown