Leaching of APC residues from secondary Pb metallurgy using single extraction tests: the mineralogical and the geochemical approach

Geochemical position of Pb, Zn and Cd in soils near the Olkusz mine/smelter, South Poland: effects of land use, type of contamination and distance from pollution source

“…Under these conditions the possible transformations mainly to caracolite and partially to anglesite are expected in the atmospehere. The following transformation process in the soil system is also controlled through the stability of metal-bearing phases under the pH conditions (Ettler et al 2005a;Vítková et al 2009). In profile 1 (near the smelter) under a pH of about 8.0 (Table 1) a complete dissolution of caracolite should take place and orthorhombic PbSO 3 , laurionite, cerussite or hydrocerussite are expected as the predominant Pb phases.…”

“…A leaching test of air-pollution-control residues from a secondary lead smelter showed that, after deposition of the residues, a mineralogical transformation takes place. The transformation process depends on the pH of the leaching solution (Ettler et al 2005a).…”

Mineral phases of weathered and recent electric arc furnace dust

“…The weathered sample also presents Hydrocerussite (Pb 3 (CO 3 ) 2 (OH) 2 ) and Hydrozincite (Zn 5 (OH) 6 (CO 3 ) 2 ). Laurionite and Hydrocerussite are typical weathering products of lead [32][33][34][35] and Hydrozincite is a known weathering product of zinc [36]. The presence of titanium dioxide, suspected to be present in all four samples, could not be ascertained due to the superimposition of its two most intense diffraction peaks with those of spinel.…”

The pH-dependent leaching of inorganic contaminants from secondary lead smelter fly ash

“…from MSWI residues exhibit a typical U-or V-shaped curve with higher concentrations in the acidic and alkaline pH regions as a result of precipitation/dissolution or sorption/desorption processes [10,11]. This paper is a continuation of previous works on the chemical and mineralogical characterisation of fly ash from secondary Pb metallurgy and leaching experiments using standardised simple extractions [1,2]. Here, we present the first results on the pH-dependent leaching behaviour of smelter fly ash using pHstatic experiments according to the European standard prEN 14997 [12], performed on fresh and washed residue samples.…”

“…The efficiency of the filtering systems in smelters is very high (99.85%); however, a certain amount of the residues can be emitted and may settle into the environment [1]. As a result, increased concentrations of metals may be released into soils in the vicinity of the smelters [2,3]. Understanding the leaching characteristics is important for both environmental and toxicological assessment.…”