Quasi-dynamic leaching characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) from raw and solidified air pollution control (APC) residues were examined via a nine-time multiple leaching test. The effect of injected activated carbon in the APC residues on the PCDD/F leachability was also evaluated. When humic acid solution was used as a leachant, the leaching concentra...

In this study various leaching technologies were applied to extract heavy metals from sludge from the printed circuit board process. These methods included traditional acid extraction (TAE) and microwave assisted treatment (MAT). The target heavy metal was copper. Experiments were performed to determine the acid the leaching efficiency by changing operating conditions, including acid type and c...

Recycling platinum group metals from secondary resources such as spent automotive exhaust catalysts is promising for the circular economy. However, selective separation of Pt over massive amounts impurity Mg and Al particularly challenging. In this study, non-aqueous direct leaching a catalyst (SAC) using hydrophobic ionic liquids, namely, trihexyl(tetradecyl)phosphonium chloride (P66614Cl) tri...

A novel energy-saving hydrometallurgical recovery process for copper from electronic scrap employing the Cu(I)-ammine complex has been presented on the basis of a thermodynamic consideration. In order to experimentally explore the feasibility of the leaching stage in this process, the copper leaching behavior from a printed circuit board (PCB) in ammoniacal alkaline solutions has been investiga...

This paper discusses the scientific rationale for methods of platinum metals sorption centralization from saturated solutions with a high content macrocomponents. Methods and iridium using local anionites such as AH-31, AB-17-8, Purolite S985 are described. The sorbents used were conditioned to remove organic mineral impurities. isotherms group 1/EC=f(1/Cp) at temperature 20 °C duration 24 h pl...

Abstract Magnesium chloride hexahydrate crystal (MgCl 2 .6H O) is an intermediate product used to obtain Mg metal from its ores. This work aims produce purified MgCl O crystals natural Egyptian serpentine. Serpentine samples were collected the Eastern Desert in Egypt and prepared for leaching with HCl solutions. Reaction temperature (°C), time (h), solid/liquid ratio (g/mL), acid concentration ...