From geochemistry to ecotoxicology of rare earth elements in aquatic environments: Diversity and uses of normalization reference materials and anomaly calculation methods

Rétif, Julie; Zalouk-Vergnoux, Aurore; Briant, Nicolas; Poirier, Laurence

doi:10.1016/j.scitotenv.2022.158890

Cited by 13 publications

(18 citation statements)

References 87 publications

(80 reference statements)

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“…The Y/Ho ratios (Table 2), which are used in the literature to ascertain the predominantly marine or terrestrial origin of REE in aquatic objects [53], demonstrate both high superchondritic (82)(83)(84)(85)(86)(87)(88)(89)(90)(91)(92)(93)(94) and nearly chondritic values (36)(37)(38)(39)(40)(41)(42)(43). The separation of the Y/Ho ratios into the two categories is more clearly seen in the Ho-Y plots for individual samples (Figure 5).…”

Section: Ree Enrichment Anomalies and Characteristic Ratiosmentioning

confidence: 96%

“…In Equations ( 3)-( 9), the notations REE N designate the same as in Equation (2), i.e., the corresponding REE contents in shells normalized by their contents in the reference material (Late Pleistocene sediments). The formulas for the REE anomaly calculation were chosen such that they did not involve contents of elements that were suspected to be anomalously distributed [92,93]. For example, unlike the formulations in many widely accepted approaches [8,9,45,93,104], the cerium anomaly relationships used did not include La content, which was itself anomalous in the present study.…”

Section: Ree Enrichment Anomalies and Characteristic Ratiosmentioning

confidence: 99%

“…In most of the studies of carbonate sediments, the measured REE contents normalized by the Post-Archaean Australian Shale (PAAS) values are well below 1 [6,53,67,71,72,91], which implies weak bioconcentration of REE in carbonate rocks and may introduce ambiguity in relation to the rock weathering and anthropogenic contamination contributions, as well as processes related to specific enrichment or depletion of a certain group of REE in shells. This discrepancy highlights the problem of appropriate normalization when studying REE distribution in natural objects [92,93].…”

Section: Introductionmentioning

confidence: 99%

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Rare Earth Elements in Shells of Black Sea Molluscs: Anomalies and Biogeochemical Implications

Kapranov,

Ryabushko,

Dikareva

et al. 2024

JMSE

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Rare earth elements (REE) are a class of increasingly used high-tech product components and new emerging environmental pollutants, which are accumulated, in particular, in marine biota. In this study, REE contents were estimated in shells of several molluscs common in the Black Sea. The summed REE contents in mollusc shells decreased in the following order of species: Magallana gigas = Anadara kagoshimensis > Flexopecten glaber ponticus ≥ Rapana venosa > Mytilus galloprovincialis, ranging from 0.46 to 1.9 mg·kg−1. Canonical analysis of principal coordinates allowed for the correct identification of species based on the REE composition in no fewer than 67% of the samples. The mollusc shells were anomalously enriched in Sc, Y, La, Eu and Tb, most likely due to anthropogenic contamination. The Y/Ho ratios in all samples were represented by two fit values: 23.2 (chondritic) and 67.6 (superchondritic, mainly associated with A. kagoshimensis). A new universal relationship linking the contents of three light and heavy REE in Black Sea mollusc shells was proposed: Ce0.3 Er0.7⁄Yb = 2.00 ± 0.46 (mean ± standard deviation).

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Section: Ree Enrichment Anomalies and Characteristic Ratiosmentioning

confidence: 96%

Section: Ree Enrichment Anomalies and Characteristic Ratiosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rare Earth Elements in Shells of Black Sea Molluscs: Anomalies and Biogeochemical Implications

Kapranov,

Ryabushko,

Dikareva

et al. 2024

JMSE

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“…Ce, Eu) or anthropogenic inputs (e.g. Gd), followed the equations (Lawrence et al, 2006;Retif et al, 2023):…”

Section: Normalization Of Rees Concentrations and Calculation Of Ce E...mentioning

confidence: 99%

Rare earth elements distribution in the Gulf of Cádiz (SW Spain): geogenic vs. anthropogenic influence

Cobelo-García,

Bernárdez,

Mendoza-Segura

et al. 2024

Front. Mar. Sci.

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There is a current interest in the study of the geochemical behavior of the rare earth elements (REE) in aquatic systems since their identification as potential microcontaminants in natural waters. In this context, here we report the concentrations and patterns of dissolved REE (dREE) in the waters of the Gulf of Cádiz (GoC) and its major estuaries (Guadiana, Tinto-Odiel and Guadalquivir). Contamination in this area by metals has been extensively reported, linked to acid-mine inputs resulting from the mineralization of the Iberian Pyrite Belt, discharged mainly to the Tinto-Odiel river. However, the impact of these inputs on the concentrations and distribution of the dREE in the coastal waters of the GoC has not been addressed yet. Accordingly, elevated concentrations of dREE were obtained in the Tinto-Odiel estuary compared to the Guadiana and Guadalquivir, reflecting the impact of acid-mine drainage on this system. Only a significant fraction of anthropogenic gadolium (Gd) was observed in the Guadalquivir estuary, as a result of the input from major urban areas, where anthropogenic Gd fractions higher than 70% over the total dissolved pool were obtained for the freshwater end-member. Regarding the surface waters of the GoC, typical NE Atlantic distribution patterns of dREEs were obtained, but modified by two different end-members within this region. Accordingly, and despite the low water discharge of the Tinto-Odiel river, its elevated concentrations lead to an increase in the concentrations of dREEs in the nearshore waters of the GoC and producing a distinctive signature as observed for the MREE anomalies and HREE/LREE ratios. At the easternmost stations, close to the Strait of Gibraltar, these signals are also impacted by the inflow of Mediterranean waters and also by the discharge of the Guadalquivir river.

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“…For quantitative indicators, a mathematical model can be established to calculate the specific score of the indicator. In the green evaluation system of flotation collectors, a normalization function is used to convert the scores of quantitative indicators into a data format [26][27][28].…”

Section: Determination Of Index Weight Of Flotation Collector Green E...mentioning

confidence: 99%

Construction of a Green-Comprehensive Evaluation System for Flotation Collectors

Cui

Cao

et al. 2023

Processes

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The evaluation of flotation reagents performs an important role in the selection and green application of reagents. The green indexes and effect indexes of flotation collectors were selected by data literature method, system analysis method, mathematical model method, and qualitative and quantitative analysis method, and the green evaluation system of flotation collectors, flotation effect evaluation system, and comprehensive evaluation system of flotation collectors were established. The normalization method and expert evaluation methods were adopted to obtain the grade classification of quantitative and qualitative indicators, respectively. The analytic hierarchy process (AHP) was used to determine the weight of secondary indicators and tertiary indicators of the evaluation system and the weight of indicators at a lower level. Applying the fuzzy comprehensive evaluation (FCE), the trapezoidal function is selected to determine the index affiliation, the index system score is calculated according to the weighted average principle, and finally, the established evaluation system is applied in an example. The example application shows that the comprehensive evaluation system of flotation collectors can make a comprehensive evaluation of collectors from the aspects of the greenness of reagent, flotation effect, and cost, and it has a strong target and practicality for collectors evaluation. The establishment of the system has a guiding significance for the selection and use of flotation collectors.

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From geochemistry to ecotoxicology of rare earth elements in aquatic environments: Diversity and uses of normalization reference materials and anomaly calculation methods

Cited by 13 publications

References 87 publications

Rare Earth Elements in Shells of Black Sea Molluscs: Anomalies and Biogeochemical Implications

Rare Earth Elements in Shells of Black Sea Molluscs: Anomalies and Biogeochemical Implications

Rare earth elements distribution in the Gulf of Cádiz (SW Spain): geogenic vs. anthropogenic influence

Construction of a Green-Comprehensive Evaluation System for Flotation Collectors

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