Effects of progressive carbonation on heavy metal leaching from cement‐bound waste

Construction and demolition waste: Comparison of standard up-flow column and down-flow lysimeter leaching tests

“…For most elements the pH-dependent curves reflected typical behaviours reported in the literature for cementitious materials (e.g. Engelsen et al, 2010Engelsen et al, , 2009Müllauer et al, 2012;Onori et al, 2011;van der Sloot, 2000;Van Gerven et al, 2006;Van Gerven et al, 2003). In contrast with the results of Engelsen et al, 2010 who observed low leaching of Pb at pH > 6, the leaching of lead was relatively stable at pH < 10 and somewhat scattered at pH > 10.…”

“…The behaviour of samples CDW3 and CDW4 reflected typical trends of aged C&DW, as reported by, for example, Engelsen et al (2010Engelsen et al ( , 2009, Garrabrants et al (2004), Van Gerven et al (2006. For instance, Si releases were higher for CDW3 and CDW4 at high pH, which is typical for aged samples, owing to the higher solubility of amorphous Si with respect to the original CSH phases (e.g.…”

Stabilization/solidification of an alkyd paint waste by carbonation of waste-lime based formulations

“…The extraction test as the digestion procedure for total heavy metals determination [28], the availability leaching test NEN 7341, the static pH test and the dynamic column test CEN/TS 14405 can be used as characterization tests in order to study the key parameters controlling the contaminants release [29,30]. The compliance tests are aimed at a direct comparison with regulatory thresholds and have been developed for several materials and different utilization or management scenarios of landfill or reuse [31,32]. In the EU legal framework, limiting values of the total content and chemical concentrations in the batch tests EN 12457-1,2 and percolation test CEN/TS 14405 at L/S = 0.1 are considered as the acceptance criteria for different classes of landfill [33].…”

Current status and perspectives of accelerated carbonation processes on municipal waste combustion residues

“…Papadakis et al 1991;Johanneson and Utgenannt 2001;Short et al 2001;Van Balen 2005). More recently, research has also focused on accelerated carbonation treatment of cement-bound waste to promote the stabilization degree and improve the leaching behaviour of the treated material (Lange et al 1996;Bin-Shafique et al 1998;Van Gerven et al 2006). The CO 2 sequestration potential of concrete demolition waste has also been lately studied (Shtepenko et al 2005;Stolaroff et al 2005).…”