Rare Earth elements in rocks and soil profiles of a tropical volcanic archipelago in the Southern Atlantic

Feitosa, M. M.; Silva, Ygor Jacques Agra Bezerra da; Biondi, Caroline Miranda; Alcantara, Vanja Coelho; Nascimento, Clístenes Williams Araújo do

doi:10.1016/j.catena.2020.104674

Cited by 21 publications

(6 citation statements)

References 65 publications

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“…Such values were above the REE concentrations reported for the states and countries displayed in Table 1. Indeed, the REE concentrations in the Southeastern mesoregion ( P REEs = 262.75 mg kg -1 ) were similar to those found in volcanic soils (Feitosa et al 2020). The highest QRVs were also observed in the Southeastern region.…”

Section: Background Concentrations and Qrvs Of Rees In Soilssupporting

confidence: 72%

“…This digestion method releases the REE concentrations that will become available in the medium and long term. The extraction encompasses the environmentally relevant fractions, such as the REE concentrations in sulfates, oxides, carbonates and less labile phases (USEPA, 1998;Rao et al 2010;Löll et al 2011;Alfaro et al 2015;Feitosa et al 2020). All analyses were performed in duplicate.…”

Section: Determination Of Rees and Quality Controlmentioning

confidence: 99%

“…The QRVs for heavy metals have been established and regulated in several Brazilian states (Almeida Júnior et al 2016;Biondi et al 2011;Boechat et al 2020;Costa et al 2017;Feitosa et al 2020;Fernandes et al 2018;Preston, 2014;Sahoo et al 2020;Santos & Alleoni, 2013;Silva et al 2015) and around the world (Chen et al 1991;Salonen & Korkka-Niemi, 2007;Martinez-Lladó et al 2008;Alfaro et al 2015), which has advanced knowledge of the natural patterns of these elements and contributed to environmental monitoring. REE background concentrations are the first step to establish guideline values for monitoring these elements in the environment and supporting future research on anthropogenic impacts related to soil contamination.…”

Section: Introductionmentioning

confidence: 99%

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Distribution of rare earth elements in soils of contrasting geological and pedological settings to support human health assessment and environmental policies

Landim

Silva

Nascimento

et al. 2021

Environ Geochem Health

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Establishing quality reference values (QRVs) for rare earth elements (REEs) in soils is essential for the screening of these emergent contaminants. Currently, Brazil has the second-largest reserve of REEs, but data regarding background concentrations and distributions in soils remain scarce. The aim of this study was to establish the QRVs and assess the spatial distribution of REEs in soils, including REE fractionations and anomalies in (Piauí) state (251,529.186 km 2 ), northeastern Brazil. This study reports the most detailed data on REE geochemistry in Brazilian soils. A total of 243 composite soil samples was collected at 0-20 cm depth. The mean background concentrations in soils followed the abundance of the earth's upper crust:REEs (mg kg -1 ) showed the following order based on the individual mesoregions of Piauí state: Southeast (262.75) ). The highest QRVs were observed in the Southeast mesoregion. The establishment of QRVs based on the mesoregion scale improves data representativeness and the monitoring of natural REE values by identifying hot spots. Geostatistical modeling indicated significant local variability, especially in the Southeast mesoregion. The levels of these elements in this spatial zone are naturally higher than the other values across Piauí state and the mesoregion itself and indicate a high potential to exceed the QRVs. Our approach provides much needed data to help strengthen policies for both human health and environmental protection.

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Section: Background Concentrations and Qrvs Of Rees In Soilssupporting

confidence: 72%

Section: Determination Of Rees and Quality Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Distribution of rare earth elements in soils of contrasting geological and pedological settings to support human health assessment and environmental policies

Landim

Silva

Nascimento

et al. 2021

Environ Geochem Health

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“…Greater accumulation of LREEs was found by Pereira et al (2023) in gold mining areas in the Amazon. Due to the sandier particle size of the tailings (Table 1), these residues deserve special attention, as they have a low potential for cation retention, which favors the leaching of REEs (Feitosa et al, 2020;Padoan et al, 2021). Furthermore, the low pH of waste rock and tailings favors the release of bioavailable concentrations of REEs, which can increase risks to the ecosystem and human health (Costis et al, 2021;Ou et al, 2022).…”

Section: Chemical Properties and Particle Size Distributionmentioning

confidence: 99%

Artisanal mining of monazite and cassiterite in the Amazon: Potential risks of rare earth elements for the environment and human health

da Costa Alves Filho,

da Silveira Pereira,

Dias

et al. 2024

Environmental Management

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A artisanal mining is applied on a large scale in developing countries, and in the Amazon region, the scenario is no different. This method of mineral exploration generally does not employ mitigation techniques for potential damages and can lead to various environmental problems and risks to human health. The objectives of this study were to quantify the concentrations of Rare Earth Elements (REEs) and estimate the environmental and human health risks in artisanal mining areas for cassiterite and monazite in the Amazon region, as well as to understand the dynamics of this risk over time after exploitation. A total of 32 samples of waste classi ed as sterile and mining reject in active areas, as well as in areas deactivated for one and ten years, were collected. Soil samples were also collected in a forest area considered as a reference site. The concentrations of REEs were quanti ed using alkaline fusion and ICP-MS. The results were used to calculate pollution indices and environmental and human health risks.REEs showed higher concentrations in anthropized areas. Pollution and environmental risk levels were higher in areas deactivated for one year, with considerable contamination factors for Gd and Sm and signi cant to extreme enrichment factors for Sc. Human health risks were low in all studied areas. The results indicate that artisanal mining of cassiterite and monazite has the potential for contamination and enrichment by REEs.

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“…For the systematic and convenient examination of the geochemical behaviour of REEs, there are two subgroups commonly recognized as light REEs (LREEs; Z = 57-64) and heavy REEs (HREEs; Z = 21, 39, 65-71). The total concentration of REEs in soils is mainly dependent on their parent materials [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Bioaccumulation of Selenium, Heavy Metals and Rare Earth Elements with Different Rice Cultivars Grown on Seleniferous Soils in Lianchen County, Fujian Province, China

Chen

Wang

et al. 2023

Environments

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Seleniferous red soils cover a large area in the southern part of China. These agricultural soils are enriched in selenium (Se), heavy metals, and rare earth elements and have been cultivated for more than 1000 years for rice production without any consideration of the effects of selenium, heavy metals, and rare earth element bioaccumulation in the food plants produced. To address this knowledge gap, this study focuses on the investigation of Se, heavy metals, and rare earth elements within soils and plants in the region. The rice (Oryza spp.) plants studied were grown in the Gutian (GT), Gechuan (GC), and Pengkou (PK) villages in Lianchen (LC) County, Fujian Province. The surface soils and harvested rice tissues were collected to determine the Se, Cd, Zn, Pb, La, Ce, and Nd concentrations in the soils and plant tissues. Different rice cultivars possessed various potentials for elemental accumulation. Generally, rice plant tissues accumulated certain amounts of these elements; however, the elemental concentrations found in rice grain were within the acceptable ranges stipulated by the National Security Standard of Food. The Hongbaoshi (HBS) Indica red rice produced in the PK village accumulated more selenium, heavy metals, and rare earth elements than those in the plant tissues of the Xinyinzhan (XYZ) and Wushansimiao (WSSM) rice cultivars because HBS had more root hairs and finer root distribution. Thus, in the interest of food safety, increased attention needs to be given to the careful selection of the optimum crop species planted in these types of seleniferous red soils.

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Rare Earth elements in rocks and soil profiles of a tropical volcanic archipelago in the Southern Atlantic

Cited by 21 publications

References 65 publications

Distribution of rare earth elements in soils of contrasting geological and pedological settings to support human health assessment and environmental policies

Distribution of rare earth elements in soils of contrasting geological and pedological settings to support human health assessment and environmental policies

Artisanal mining of monazite and cassiterite in the Amazon: Potential risks of rare earth elements for the environment and human health

Bioaccumulation of Selenium, Heavy Metals and Rare Earth Elements with Different Rice Cultivars Grown on Seleniferous Soils in Lianchen County, Fujian Province, China

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