Cadmium and lead distribution in pyrite ores

The pyrite ores are strategic industrial resources which generally serve as raw material for producing sulfuric acid. However, during the mining and processing activities, associated toxic elements of cadmium (Cd) lead (Pb) could be released into surroundings, posing a significant threat to local environment human health. In this study, Institute Reference Materials Measurement (IRMM) sequential extraction scheme was used investigate geochemical fractionation Cd Pb in from area located Yunfu, western Guangdong, China. results showed that most (>90%) were predominantly found geochemically mobile fractions, indicating readily bioaccessible thus easily assimilated accumulated by organisms. FESEM-EDS studied mainly composed O, S, Fe, while XRD characterizations suggested FeS2 SiO2 major minerals. high-resolution transmission electron microscope element mapping characterization further confirmed main mineral contained relatively enriched heavy metals (e.g., Cd). findings highlight an extremely large amount can environmental media utilization processes based on IRMM protocol. Therefore, proper countermeasures against risks utilizing should taken mitigate impacts ecosystem