Potential impacts of lanthanum and yttrium through embryotoxicity assays with Crassostrea gigas

Moreira, Anthony; Henriques, Bruno; Leite, Carla; Libralato, Giovanni; Pereira, Eduarda; Freitas, Rosa

doi:10.1016/j.ecolind.2019.105687

Cited by 20 publications

(5 citation statements)

References 50 publications

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“…Åström, 2001) and is comparable to other ecotoxicology trials (e.g. Moreira et al, 2020;Pinto et al, 2019). Water aliquots were sampled after 1 h, 3 h, 6 h, 12 h and 24 h of the first exposure to measure dissolved La levels.…”

Section: Experimental Designmentioning

confidence: 99%

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Warming enhances lanthanum accumulation and toxicity promoting cellular damage in glass eels (Anguilla anguilla)

Figueiredo

Raimundo

Lopes

et al. 2020

Environmental Research

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Cumulative and continuing human emissions of greenhouse gases to the atmosphere are causing ocean warming. Rising temperature is a major threat to aquatic organisms and may affect physiological responses, such as acidbase balance, often compromising species fitness and survival. It is also expected that warming may influence the availability and toxicological effects of pollutants, including Rare Earth Elements. These are contaminants of environmental emerging concern with great economic interest. This group comprises yttrium, scandium and lanthanides, being Lanthanum (La) one of the most common. The European eel (Anguilla anguilla) is critically endangered and constitutes a delicacy in South East Asia and Europe, being subject to an increasing demand on a global scale. Considering the vulnerability of early life stages to contaminants, we exposed glass eels to 1.5 μg L − 1 of La for five days, plus five days of depuration, under a present-day temperature and warming scenarios (△T = +4 • C). The aim of this study was to assess the bioaccumulation, elimination and specific biochemical enzymatic endpoints in glass eels (Anguilla anguilla) tissues, under warming and La. Overall, our results showed that the accumulation and toxicity of La were enhanced with increasing temperature. The accumulation was higher in the viscera, followed by the head, and ultimately the body. Elimination was less effective under warming. Exposure to La did not impact acetylcholinesterase activity. Moreover, lipid peroxidation peaked after five days under the combined exposure of La and warming. The expression of heat shock proteins was majorly suppressed in glass eels exposed to La, at both tested temperatures. This result suggests that, when exposed to La, glass eels were unable to efficiently prevent cellular damage, with a particularly dramatic setup in a near-future scenario. Further studies are needed towards a better understanding of the effects of lanthanum in a changing world.

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Section: Experimental Designmentioning

confidence: 99%

“…Rattanaphra et al, 2019), however very few studies exist on the toxicological effects of La in aquatic systems (e.g. Cui et al, 2012;Moreira et al, 2020;Pinto et al, 2019), including a previous one dealing with juvenile stages of the European eel (Anguilla anguilla) (Figueiredo et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Warming enhances lanthanum accumulation and toxicity promoting cellular damage in glass eels (Anguilla anguilla)

Figueiredo

Raimundo

Lopes

et al. 2020

Environmental Research

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“…34,41,42 Note also that Y lies at the lower end of the energy, cost, 43 and environmental impact scale, 44 and also displays significantly lower toxicity, reflected in a significantly higher median effect dose concentration (EC50) of 6.7 g/L vs that of La (EC50 = 147 g/L). 45 In view of these factors we sought more effective Y catalysts by finetuning the Y coordination sphere.…”

Section: Metal Ion Size and Ancillary Ligand Effectsmentioning

confidence: 99%

Catalyst Design to Address Nylon Plastics Recycling

Liu²,

Beckett³

et al. 2023

Preprint

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Rational tailoring of catalytic systems offers highly desirable transformations targeting the growing environmental challenges associated with plastics pollution. For example, the identification of efficient catalysts to address alarming end-of-life Nylon pollution remains underexplored. Nylon-6 is a non-biodegradable high-performance engineering plastic with centuries of chemical persistence, resulting in millions of tons of waste accumulation. Here we report the rational manipulation of organolanthanide catalyst structure to achieve an exceptionally efficient, solventless, and scalable Nylon-6 depolymerization process, affording monomer ε-caprolactam in ≥99% yield. Specifically, catalyst Cp*₂LaCH(TMS)₂ (Cp* = η₅-C₅Me₅, TMS = SiMe₃) operates at catalyst loadings as low as 0.2 mol% and temperatures as low as 220 °C. For efficient deconstruction of more recalcitrant commodity Nylon-6 end-of-life articles such as fishing nets, car-pets, and clothing, the robust, thermally stable ansa-metallocene catalyst Me₂SiCp’’₂YCH(TMS)₂, (Cp’’ = η₅-C₅Me₄) effects >99% conversion of these items into ε-caprolactam. The collected product can be readily re-polymerized to afford pristine Nylon-6 with higher molecular masses and comparable structural regularity, providing a superior upcycling pathway for end-of-life Nylon plastics. Experimental mechanistic studies reveal intriguing and effective depolymerization pathways, such as catalytic intrachain “unzipping” enabled by the catalyst π-ancillary ligand steric constraints. Effective interchain “hopping” mechanisms, as well as chain-end deactivation are also demonstrated and supported by DFT analyses.

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“…Gadolinium and in general all REEs toxicity studies have focused particularly on species of economic interest or those related directly to public health, such as the bacteria Vibrio fischeri (González et al, 2015), the algae Raphidocelis subcapitata and those belonging to Chlorella species (Hao et al, 1997;Fujiwara et al, 2008;Balusamy et al, 2015;González et al, 2015;Joonas et al, 2017). Nevertheless, researches involving more marine and freshwater species have been reported recently, thus covering a greater biodiversity (Blaise et al, 2018;Pinto et al, 2019;Duarte and Caçador, 2020;Freitas et al, 2020aFreitas et al, , 2020bHenriques et al, 2019;Moreira et al, 2020).…”

Section: Gadolinium Bioaccumulation In Aquatic Organismsmentioning

confidence: 99%

What do we know about the ecotoxicological implications of the rare earth element gadolinium in aquatic ecosystems?

Trapasso

Chiesa

Freitas

et al. 2021

Science of The Total Environment

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More research on gadolinium (Gd) occurrence in freshwater than marine environments • Few publications on the accumulation and effects of Gd in aquatic invertebrates • Higher diversity of freshwater species than marine species in Gd impacts studies. • Aquatic invertebrates differently bioaccumulate Gd according to its speciation. • Gd causes alterations at different biological levels in aquatic invertebrates.

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Potential impacts of lanthanum and yttrium through embryotoxicity assays with Crassostrea gigas

Cited by 20 publications

References 50 publications

Warming enhances lanthanum accumulation and toxicity promoting cellular damage in glass eels (Anguilla anguilla)

Warming enhances lanthanum accumulation and toxicity promoting cellular damage in glass eels (Anguilla anguilla)

Catalyst Design to Address Nylon Plastics Recycling

What do we know about the ecotoxicological implications of the rare earth element gadolinium in aquatic ecosystems?

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