Naslov
Investigation of thermal decomposition of jarosite tailing waste: A prerequisite for comprehensive jarosite reuse and waste minimization

Autori
Kerolli-Mustafa, Mihone ; Mandić, Vilko ; Ćurković, Lidija ; Šipušić, Juraj

Izvornik
Journal of thermal analysis and calorimetry (1388-6150) 123 (2016), 1; 421-430

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
jarosite ; decomposition ; characterization ; thermal analysis

Sažetak
During the zinc production process from sulfidic ores, the jarosite residue is produced within the precipitate containing ammonia, iron, zinc and other metal sulfates. The process yield jarosite which has been dumped as a waste despite its acidity presents environmental hazard while high content of iron, zinc, lead, cadmium and other heavy metal compounds additionally presents further utilization possibilities. In this paper, the thermal decomposition of jarosite tailing waste collected in Mitrovica Industrial Park situated in Kosovo is investigated in order to get better understanding of its possible utilization as a source of valuable raw materials. Samples of jarosite tailing waste were taken at depths of 0.2, 1 and 2 m. The samples were characterized by means of powder X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray spectrometer (SEM/EDS), thermogravimetric analysis (TG) and differential thermal analysis (DTA). The results obtained from XRD confirmed the presence of ammonium jarosite in the investigated tailing waste samples. Results of TG–DTA indicated that the decomposition of jarosite samples occurs in four consecutive stages up to the temperature of 500 °C. On behalf of SEM/EDS analysis, jarosite samples yield poorly defined micron-sized morphology associated with high content of Fe and S, but also Pb, Cd, Zn and As. Composition of jarosite tailing waste was found depth dependent which should facilitate jarosite waste reuse at the investigated site.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Temeljne tehničke znanosti

POVEZANOST RADA