1 Introduction</h5> The release of toxic metals into the environment is a matter of growing concern for environmental stakeholders ( Shaheen et al., 2013; Gollmann et al., 2010 ). Different approaches have been used to address problems arising from spills into natural waters, industrial polluted sludge, slurries and soils, contaminated wastewaters and so on ( Devasena and Nambi, 2013; Diamantis et al., 2013 ).</P>One of the most widespread alternatives for handling toxic metal solutions is encapsulating them in manageable solid blocks that allow the proper solidification/stabilization (S/S) of hazardous components and their subsequent safe disposal in landfill sites ( Ucaroglu and Talinli, 2012 ). Among the binding materials used to form these solid blocks, cements have been proved to be suitable and cost-saving agents ( Ojovan et al., 2011; Liu et al., 2013; Pandey et al., 2012 ).</P>Ordinary Portland cement (OPC) has been widely studied as a good heavy metal retainer, but the use of other alternative binders is receiving growing attention. For instance, the use of calcium aluminate cement (CAC) to safely encapsulate hazardous materials has been recognized to be highly effective ( Navarro-Blasco et al., 2013 ). The relatively low pH of this kind of cement
Journal of Environmental Management – Elsevier
Published: Jul 1, 2014
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