Zirconium and hafnium

Jones, James V.; Piatak, Nadine M.; Bedinger, George M.

doi:10.3133/pp1802v

Cited by 22 publications

(7 citation statements)

References 51 publications

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“…Spectral lines of niobium and tantalum may have originated from the presence of a small amount of columbite, which is sometimes observed in Indian placer deposits (Abedin et al 2011, Gupta et al 2005. Zircon in silicate form melts with high field strength incompatible elements like hafnium (Schulz et al 2018) that is the cause of the presence of hafnium lines in our sample.…”

Section: Discussionmentioning

confidence: 75%

Identification of Multiple Rare Earths and Other Associated Elements in Zircon by Laser-Induced Breakdown Spectroscopy

Haider

Khan

2020

J Bangladesh Acad Sci

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Laser-induced breakdown spectroscopy (LIBS), which is a powerful technique for the detection of minor and trace elements in a sample, has been used to analyze the enriched zircon mineral collected from the beach sands of southern Bangladesh. In addition to zirconium, a large number of rare earth elements viz. cerium, lanthanum, praseodymium, neodymium, ytterbium, gadolinium, dysprosium, erbium, samarium, europium, holmium and yttrium and other associated elements like hafnium, niobium, tantalum, magnesium, calcium, sodium, titanium and iron along with non-metals like phosphorus and silicon were detected in the enriched zircon samples by the LIBS technique. To the best of our knowledge, this is the first time that multiple rare earth elements have been identified in natural zircon by LIBS. Journal of Bangladesh Academy of Sciences, Vol. 44, No. 1, 59-68, 2020

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Section: Discussionmentioning

confidence: 75%

Identification of Multiple Rare Earths and Other Associated Elements in Zircon by Laser-Induced Breakdown Spectroscopy

Haider

Khan

2020

J Bangladesh Acad Sci

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“…The variable that most impacted children, adults, and adjusted HI was Zr, with mean contributions of 93.2 (sand) and 85.1% (silt) (Figure 8). Chronic Zr exposure can cause respiratory tract irritation, dermatitis, and pulmonary fibrosis [96]. Samples Br, Ca, Cr, Pb, Mg, P, K, Si, Na, S, and Ti concentration do not pose a non-carcinogenic risk to humans.…”

Section: Risk Assessmentmentioning

confidence: 99%

Geophagic Materials Characterization and Potential Impact on Human Health: The Case Study of Maputo City (Mozambique)

2022

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This study aims to characterize and estimate risk assessment associated with geophagic materials consumption in Maputo city (Mozambique). Samples were collected in extraction mines, unprepared and prepared ones, and in Maputo markets. Fractions < 2 mm (total consumed material) and <63 μm were analyzed to determine pH, EC, OM, chemical composition (XRF), and mineral phases present (XRD). The results revealed pH from slightly acidic to slightly alkaline, and electrical conductivity ranging from 13 to 47 μS/cm in mine unprepared and prepared samples, while 264–465 μS/cm in sampled sold in markets. Organic matter content was <2.76%, except in one sample (8.14%), suggesting a potential risk of containing bacteria. Textural analysis revealed that sand-size particles were more representative in all samples (57.2–93.02%). Mineralogical phases identified in the consumed sample were ranked quartz (>60%) > Fe oxides/hidroxides > phyllosilicates (micas and kaolinite) > feldspars, suggesting a risk of dental enamel damage and perforation of the sigmoid colon. The chemical concentration of some elements was higher than recommended daily dose, suggesting a potential risk. However, geophagic materials’ chemical composition does not pose a carcinogenic risk.

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“…Geo-environmental features include multiple information on the 'geological and geochemical setting of mineral deposits, mining and mineral processing techniques as they relate to the development of mine waste and the environmental behaviour of mineral deposits in the wider context'. Researches in the areas of mineral raw material extraction (exploration), extraction (exploitation), and treatment (treatment), as well as the geo-environment, to preserve and rehabilitate the environment, as well as promoting social well-being, are now priority areas of mining industry (Jones et al, 2017;Mandal & Pal, 2022). The followings are the factors which contributed to operational excellence in mining:…”

Section: Geo-environmental Factor [Gef]mentioning

confidence: 99%

Geo-environmental factors’ influence on mining operation: an indirect effect of managerial factors

Mishra¹,

Panigrahi

Shrivastava

2023

Environ Dev Sustain

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The purpose of the paper is to identify factors associated with operational factor (OF), geo-environmental factor (GEF), and managerial factor (MF) from the literature. After identification, the study intended to assess the impact of geo-environmental factors and managerial factors on operational factors of the mining industry. The study also tests the indirect effect of managerial factors between GEF and OF in the Indian environment. The geographical boundary of the study was 06 large mines of Odisha, Jharkhand, and Chhattisgarh of India. Three hundred and twenty nine number of purposive samples were collected via email and filtered and processed through the SPSS package. To find out the complex role and inter-relationship of GEF and MF on OF, the study adopted the structural equation modelling technique. The finding reflects that MF plays a partial mediation among GEF and OF. This phenomenon is completely novel in its field when it comes to the geo-environmental and management difficulties confronting mining operations. This research can aid managers in identifying key geological and environmental concerns in mining operations, as well as providing data for regulatory compliance. Overall, this study's findings can help management create policies and manage the environmental concerns of the mining sector. The study's findings provide important directions for future Indian mining research.

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Zirconium and hafnium

Cited by 22 publications

References 51 publications

Identification of Multiple Rare Earths and Other Associated Elements in Zircon by Laser-Induced Breakdown Spectroscopy

Identification of Multiple Rare Earths and Other Associated Elements in Zircon by Laser-Induced Breakdown Spectroscopy

Geophagic Materials Characterization and Potential Impact on Human Health: The Case Study of Maputo City (Mozambique)

Geo-environmental factors’ influence on mining operation: an indirect effect of managerial factors

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