Effects of rare earth elements (REE) on terrestrial organisms: current status and future directions

Egler, Sílvia Gonçalves; Niemeyer, Júlia Carina; Correia, Fábio Veríssimo; Saggioro, Enrico Mendes

doi:10.1007/s10646-022-02542-6

Cited by 25 publications

(8 citation statements)

References 57 publications

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“…Some evidence has shown that the mobility and bioavailability of REE in excreta deposited on land could be promoted by containing high organic carbon and low pH (Yin et al 2020). The increased organic matter and acidity of the soil in the nesting sites found by Espejo et al (2017a) in the same area can enhance the mobility and bioavailability of REE, which could affect some terrestrial invertebrate organisms, such as reproduction alterations and reduced locomotion (Egler et al 2022). These results could contribute valuable knowledge about the potential for penguins to be vectors of lesser-known elements from the sea to the land, which can help to perform more accurate risk assessments through further studies.…”

Section: __________________mentioning

confidence: 87%

Assessing the influence of Humboldt penguin (Spheniscus humboldti) by excrements on the levels of trace and rare earth elements in the soil

Celis¹,

Espejo

Padilha³

et al. 2022

Lat. Am. J. Aquat. Res.

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Rare earth elements (REE) and some transition metals (e.g. Nb) are a group of chemicals that have recently been widely used in industrial processes due to the increasing demand for new technologies. As a result, these chemicals are increasingly being released into the environment, which could mean that these pollutants could modify marine and terrestrial ecosystems. Seabirds, such as penguins, can biotransport pollutants and nutrients from the sea to land through excreta. However, there is no information about the role of the Humboldt penguin (Spheniscus humboldti) in bio-transporting emerging contaminants such as REE. This study aimed to assess any possible contribution of Humboldt penguins to the geochemical composition of some terrestrial areas. Excreta samples were collected from Chañaral Island, one of the most important sites in Chile for the conservation of Humboldt penguins. The results showed that this species tends to contribute to soil enrichment with REE (Ce, La, Nd, and Pr) and Nb through excreta, as well as with carbon. More studies are needed to see the potential impacts on the soil.

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Section: __________________mentioning

confidence: 87%

Assessing the influence of Humboldt penguin (Spheniscus humboldti) by excrements on the levels of trace and rare earth elements in the soil

Celis¹,

Espejo

Padilha³

et al. 2022

Lat. Am. J. Aquat. Res.

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“…Despite the absence of a single mechanism explaining the hormesis phenomenon, there is notable evidence indicating its adaptive nature with an ability to regulate antioxidative enzymatic processes [ 33 , 34 ]. On the other hand, hormesis may also be associated with the increased uptake of nutrients, including nitrogen [ 63 ]. In the case of U. isabellina and S. polyspora , the uptake of additional nitrogen can negate adaptive processes in fungi in the hormetic zone of concentrations.…”

Section: Discussionmentioning

confidence: 99%

Hormesis and Low Toxic Effects of Three Lanthanides in Microfungi Isolated from Rare Earth Mining Waste in Northwestern Russia

Kasatkina,

Shumilov,

Kirtsideli

et al. 2023

Toxics

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The low-dose toxicity of chloride and nitrate salts of three lanthanides (La, Ce and Nd) was tested on six microfungal species. Five of them (Geomyces vinaceus, Aspergillus niveoglaucus, Pseudogymnoascus pannorum, Penicillium simplicissimum and Umbelopsis isabellina) were isolated from the loparite ore tailings on the Kola Peninsula, northwestern Russia. Sydowia polyspora was a control strain. In the case of nitrate salts, the toxicity of REEs to four of six microorganisms was significantly (p < 0.5) lower compared to chloride salts. In this case, nitrates can play the role of exogenous nutrients, compensating for the toxic effect of REEs. Interestingly, U. isabellina only showed an opposite response, indicating the highest toxicity of nitrate (IC5 = 9–20 mg/L) REEs’ salts compared to chlorides (IC5 = 80–195 mg/L) at low concentration levels. In addition, treatment with lanthanides showed a “hormesis effect” on fungal growth with stimulation at low doses and inhibition at high doses. However, U. isabellina and S. polyspora demonstrated the absence of hormetic response under the treatment of REEs’ nitrate salt. Taking into account the specific hormetic responses and high tolerance of P. simplicissimum and U. isabellina to lanthanides, our findings may be useful in the assessment of the potential application of the selected fungi to bioremediation and REE bioleaching.

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“…Rare earth elements (REE) comprise a group of 17 chemical elements, 15 from the lanthanide series, plus yttrium and scandium (Egler et al 2022). Based on their electronic con gurations, lanthanides are classi ed as light (LREE), from lanthanum to europium, and as heavy (HREE), from gadolinium to lutetium (Silva et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Phytotoxicity of single and mixed Rare Earth Element (La, Nd and Sm) exposures on Lactuca sativa seed germination and growth

Egler,

Roldão,

Santos

et al. 2024

Preprint

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The mode of action, bioaccumulation potential and toxicity of Rare Earth Elements (REE), with several applications in the technology, medical and agricultural fields, are still understudied. The nitrates acute effects on single exposures, binary and ternary mixtures of lanthanum (La), neodymium (Nd) and samarium (Sm) on Lactuca sativa lettuce seed germination and wet biomass in an artificial soil (AS) and an Ultisol were assessed. Germination (EC50), wet biomass (IC50) and germination inhibition (% GI) were evaluated. EC50 values La was the most toxic in PVA, Sm in AS, and Nd appears with intermediate values on both substrates. The IC50, both single and mixed, decreased from 3- to 181-fold with increasing test concentrations in relation to the control in AS, while increases in Ultisol were observed, followed by decreases at higher doses which may be associated with the low-dose stimulation effect (hormesis). Our findings may be used to subsidize REE risk assessment studies and reinforce the hormesis effect to prevent the use of high application of REE fertilizers, avoiding the accumulation of REE in agricultural soils.

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Effects of rare earth elements (REE) on terrestrial organisms: current status and future directions

Cited by 25 publications

References 57 publications

Assessing the influence of Humboldt penguin (Spheniscus humboldti) by excrements on the levels of trace and rare earth elements in the soil

Assessing the influence of Humboldt penguin (Spheniscus humboldti) by excrements on the levels of trace and rare earth elements in the soil

Hormesis and Low Toxic Effects of Three Lanthanides in Microfungi Isolated from Rare Earth Mining Waste in Northwestern Russia

Phytotoxicity of single and mixed Rare Earth Element (La, Nd and Sm) exposures on Lactuca sativa seed germination and growth

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