Evaluation of soils under the influence of coal mining and a thermoelectric plant in the city of Candiota and vicinity, Brazil

Souza, Melissa Rosa de; Garcia, Ana Letícia Hilário; Dalberto, Daiana; Nicolau, Caroline Cardoso; Gazzineu, Amanda Lima; Grivicich, Ivana; Boaretto, Fernanda Brião Menezes; Picada, Jaqueline Nascimento; Souza, Guilherme Maurício Soares de; Chytry, Paola; Dias, Johnny Ferraz; Corrêa, Dione Silva; Silva, Juliana da

doi:10.1016/j.mrgentox.2021.503350

Cited by 7 publications

(1 citation statement)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Three southern Brazilian states, Paraná, Santa Catarina and Rio Grande do Sul, are responsible for the majority of mineral coal mining that occurs in Brazil and that is aimed at feeding thermoelectric power plants generating Brazilian electricity [25][26][27][28]. These studies [25][26][27][28], carried out with coal in the southern region of Brazil, raise concerns related to the negative impacts attributed to environmental quality that are capable of covering large regions, generating environmental unsustainability. Of the three states mentioned above (Paraná, Santa Catarina and Rio Grande do Sul), the state of Santa Catarina contains 80% of Brazil's known coal reserves, totaling approximately seven layers of coal in areas destined for mining activities [27,29].…”

Section: Introductionmentioning

confidence: 99%

Brazilian Coal Tailings Projects: Advanced Study of Sustainable Using FIB-SEM and HR-TEM

et al. 2022

View full text Add to dashboard Cite

The objective of this study is to obtain a more detailed assessment of particles that contain rare-earth elements (REEs) in abandoned deposits of Brazilian fine coal tailings (BFCTs), so as to aid current coal mining industries in the identification of methodologies for extracting such elements (Santa Catarina State, Brazil). The BFCT areas were sampled for traditional mineralogical analysis by X-ray Diffraction, Raman Spectroscopy and nanomineralogy by a dual beam focused ion beam (FIB) coupled with field emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) coupled with an energy dispersive X-ray microanalysis system (EDS). The results show that the smaller the sampled coal fines were, the higher the proportion of rare-earth elements they contained. Although the concentration of REEs is below what would normally be considered an economic grade, the fact that these deposits are already ground and close to the surface negate the need for mining (only uncovering). This makes it significantly easier for REEs to be extracted. In addition, owing to their proximity to road and rail transport in the regions under study, the opportunity exists for such resources (BFCTs) to be utilized as a secondary market as opposed to simply being discarded as has been done in the past.

show abstract