Leaching behaviour and mechanical properties of copper flotation waste in stabilized/solidified products.
This research describes the investigation of a cement-based solidification/stabilization process for the safe disposal of copper flotation waste and the effect on cement properties of the addition of copper flotation waste (CW) and clinoptilolite (C). In addition to the reference mixture, 17 different mixtures were prepared using different proportions of CW and C. Physical properties such as setting time, specific surface area and compressive strength were determined and compared to a reference mixture and Turkish standards (TS). Different mixtures with the copper flotation waste portion ranging from 2.5 to 12.5% by weight of the mixture were tested for copper leachability. The results show that as cement replacement materials especially clinoptilolite had clear effects on the mechanical properties. Substitution of 5% copper flotation waste for Portland cement gave a similar strength performance to the reference mixture. Higher copper flotation waste addition such as 12.5% replacement yielded lower strength values. As a result, copper flotation waste and clinoptilolite can be used as cementitious materials, and copper flotation waste also can be safely stabilized/solidified in a cement-based solidification/stabilization system.
Mesci
Başak
B
Department of Civil Engineering, Ondokuz Mayis University, 55139 Samsun, Turkey.
Coruh
Semra
S
Ergun
Osman Nuri
ON
D003300:Copper; D007220:Industrial Waste; D019563:Mechanics; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D013997:Time Factors; D018505:Waste Management; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry
D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D014867:Water; C083175:clinoptilolite; D017641:Zeolites; D003300:Copper