Siciliano, Antonietta (2022) Emerging concerns on Rare Earth Elements (REEs): new impacts? The potential environmental implications on an integrated multimatrix basis. [Tesi di dottorato]
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| Item Type: | Tesi di dottorato | ||||
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| Resource language: | English | ||||
| Title: | Emerging concerns on Rare Earth Elements (REEs): new impacts? The potential environmental implications on an integrated multimatrix basis | ||||
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| Date: | 9 March 2022 | ||||
| Number of Pages: | 157 | ||||
| Institution: | Università degli Studi di Napoli Federico II | ||||
| Department: | Biologia | ||||
| Dottorato: | Biologia | ||||
| Ciclo di dottorato: | 34 | ||||
| Coordinatore del Corso di dottorato: |
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| Tutor: |
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| Date: | 9 March 2022 | ||||
| Number of Pages: | 157 | ||||
| Keywords: | Ecotoxicity; bioindicators; rare earth elements | ||||
| Settori scientifico-disciplinari del MIUR: | Area 05 - Scienze biologiche > BIO/07 - Ecologia Area 03 - Scienze chimiche > CHIM/12 - Chimica dell'ambiente e dei beni culturali Area 06 - Scienze mediche > MED/42 - Igiene generale e applicat |
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| Date Deposited: | 21 Mar 2022 20:01 | ||||
| Last Modified: | 28 Feb 2024 14:06 | ||||
| URI: | http://www.fedoa.unina.it/id/eprint/14522 |
Collection description
The use of Rare Earth Elements (REEs), especially of lanthanides, in technological devices altered their biogeochemical cycles and their presence in the e-waste made them a new category of potential emerging contaminants (EC). Apart from industrial applications, REEs have found an extensive use in Chinese agriculture as fertilizers to increase crop yield, and in zootechny as feed additives aimed at increasing animal growth and egg laying, with likely prospects of their utilization outside China. So, in the last decades, an extensive and growing body of literature on REE-associated effects in a number of biota and of test models has raised environmental concern about REE exposures. Unfortunately, as is the case for many other environmental pollutants, it was stated that most literature reported on few REEs, and gaps into the knowledge persist on the health and environmental effects of other REEs. In these cases, the ecological relevance was often insufficiently considered in terms of concentrations, model organisms and, most importantly, chemical mixtures. Often during biological effect assessments, chemical isolation, purification, concentrations and dose-response relationships less can provide relevant information about effective concentration but these procedures fail to model interactive agonistic, antagonistic and synergistic effects of each chemical constituent in the chemical mixture detected in the sample. As such, the importance of working with whole field samples (for example, soil, sediment, etc.) and with concentrations environmentally relevant becomes important. Considering the differences between field and laboratory tests, as well as the lack of data on the effects of the REEs that can be identified across their supply chain and in natural scenarios, this thesis conducted a set of tests under laboratory and field conditions to assess the effects of the REEs applied alone and REEs present in mixture on soils/sediments, in order to provide information about the effects on artificial and natural environment, under different conditions and using different test species. This work is not a life-cycle assessment, however, it does to identify environmental compartments (i.e., aquatic environment and terrestrial environment) that may be at risk, when that information is available in the literature or an association can be made with experimental data.
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