Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate

Slavković-Beškoski, Latinka J.; Ignjatović, Lj. M.; Bolognesi, Guido; Maksin, Danijela D.; Savić, Aleksandra; Vladisavljević, Goran T.; Onjia, Antonije

doi:10.3390/met12050791

Cited by 14 publications

(9 citation statements)

References 41 publications

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“…The content of REEs in nature is shaped by various factors, including the type of parent rocks they originate from (e.g., bastnaesite, monazite, allanite), the processes of their weathering, and soil formation [ 21 , 22 ]. However, one of the major anthropogenic sources of REEs is coal combustion ash, also known as coal fly ash (CFA) [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk

Vesković,

Lučić,

Ristić

et al. 2024

Toxics

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This study investigated the occurrence and distribution of rare earth elements (REEs), including 14 lanthanoids, scandium (Sc), and yttrium (Y), in groundwater around a large coal-fired thermal power plant (TPP). The ICP-MS technique was used to analyze 16 REEs in groundwater samples collected from monitoring wells. REE concentrations ranged from 59.9 to 758 ng/L, with an average of 290 ng/L. The most abundant was Sc, followed by La, accounting for 54.2% and 21.4% of the total REE concentration, respectively. Geospatial analysis revealed the REE enrichment at several hotspots near the TPP. The highest REE concentrations were observed near the TPP and ash landfill, decreasing with the distance from the plant and the landfill. REE fractionation ratios and anomalies suggested the Light REE dominance, comprising over 78% of the total REEs. Correlation and principal component analyses indicated similar behavior and sources for most REEs. Health risk assessment found hazard indices (HI) of 1.36 × 10−3 and 1.98 × 10−3 for adults and children, respectively, which are far below the permissible limit (HI = 1). Likewise, incremental lifetime cancer risks (ILCR) were all below 1 × 10−6. Nevertheless, ongoing ash disposal and potential accumulation in the environment could elevate the REE exposure over time.

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Section: Introductionmentioning

confidence: 99%

Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk

Vesković,

Lučić,

Ristić

et al. 2024

Toxics

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“…This DLLME system has four response variables, that is, four UVFs. To simultaneously consider all individual UVF recoveries, Derringer desirability function ( D ) was used as an aggregate response variable (Bezerra et al, 2019; Derringer & Suich, 1980; Slavković‐Beškoski et al, 2022), which represents the weighted geometric mean of the individual responses ( d i ). This can be shown by the following equation:

D goodbreak= {(\prod_{i = 1}^{n} d_{i}^{italicri})}^{1 / normalΣ italicri}

where n is the number of UVFs and r i are weights for the individual responses.…”

Section: Resultsmentioning

confidence: 99%

“…Considering that there are many variables in the microextraction procedure, the published works focus on optimizing the microextraction variables. An efficient approach to selecting the optimum values for microextraction variables is successfully applying screening and optimization designs of experiments (DoE) (Mousavi et al, 2018; Slavković‐Beškoski et al, 2022; Tadić et al, 2022). DoE enables the optimization of experiments to be fast and efficient and, above all, to find the optimal experimental conditions in only a few trials.…”

Section: Introductionmentioning

confidence: 99%

Dispersive liquid–liquid microextraction and Monte Carlo simulation of margin of safety for octocrylene, EHMC, 2ES, and homosalate in sunscreens

Lukić¹,

Đurkić

Onjia

2023

Biomedical Chromatography

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Dispersive liquid-liquid microextraction (DLLME) using a floating organic drop has been optimized and used for the sample preparation of four commonly used ultraviolet filter (UVF) substances in sunscreens. Plackett-Burman experimental design was used to screen 10 variables in DLLME. The most significant variables were then optimized by using a response surface method with a Box-Behnken design. DLLME followed by an optimized HPLC identified octocrylene, 2-ethylhexyl-4-methoxycinnamate, ethylhexyl salicylate, and homosalate as the frequently found UVFs in commercial sunscreens. The systemic exposure dosage and margin of safety (MoS) for the identified UVFs were estimated using in-use concentrations and application patterns. The average systemic exposure dosage values for octocrylene, 2-ethylhexyl-4-methoxycinnamate, ethylhexyl salicylate, and homosalate were 0.52, 0.61, 0.020, and 0.079 mg/kg body weight per day, respectively. Whereas the average MoS values for individual UVFs ranging from 296 to 3160 were all significantly higher than the limit value of 100, the combined exposure risks were slightly above the limit. The probabilistic health risk assessment using Monte Carlo simulation revealed that the combined MoS values were (mean, 10‰, 90‰) 342, 119, and 441, respectively. Regarding the usage of sunscreen cosmetics containing the UVFs studied, these results indicate a safety concern for those who apply multiple UVF products.

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“…An ICP-MS model iCAP Q and ICP-OES model iCAP 6500, both from Thermo Scientific Inc. (Waltham, MA, USA), were employed for the instrumental measurements. The operating conditions used in this study were described previously for ICP-OES [ 53 ] and ICP-MS [ 54 ].…”

Section: Methodsmentioning

confidence: 99%

Ecological and Health Risks Attributed to Rare Earth Elements in Coal Fly Ash

Slavković-Beškoski,

Ignjatović,

Ćujić

et al. 2024

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The occurrence and distribution of yttrium and rare earth elements (REYs), along with major elements and heavy metal(loid)s (HMs) in coal fly ash (CFA) from five coal-fired power plants (CFPPs), were analyzed, and the REY-associated ecological and health risks were assessed. The individual REYs in CFA were abundant in the following order: Ce > La > Nd > Y > Pr > Gd > Sm > Dy > Er > Yb > Eu > Ho > Tb > Tm > Lu. The total REY content ranged from 135 to 362 mg/kg, averaging 302 mg/kg. The mean light-to-heavy REY ratio was 4.1, indicating prevalent light REY enrichment in CFA. Significantly positive correlations between the REYs suggested that they coexist and share similar origins in CFA. REYs were estimated to pose low to moderate ecological risks, with risk index (RI) values ranging from 66 to 245. The hazard index (HI) and target cancer risk (TCR) of REYs from CFA, estimated to be higher for children (HIc = 0.15, TCRc = 8.4 × 10−16) than for adults (HIa = 0.017, TCRa = 3.6 × 10−16), were well below the safety limits (HI = 1, TCR = 1.0 × 10−6). However, the danger to human health posed by HMs in the same CFA samples (HIc = 5.74, TCRc = 2.6 × 10−4, TCRa = 1.1 × 10−4) exceeded the safe thresholds (excl. HIa = 0.63). The mean RI and HI attributed to REYs in CFA were 14% and 2.6%, respectively, of the total risks that include HMs.

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Dispersive Solid–Liquid Microextraction Based on the Poly(HDDA)/Graphene Sorbent Followed by ICP-MS for the Determination of Rare Earth Elements in Coal Fly Ash Leachate

Cited by 14 publications

References 41 publications

Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk

Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk

Dispersive liquid–liquid microextraction and Monte Carlo simulation of margin of safety for octocrylene, EHMC, 2ES, and homosalate in sunscreens

Ecological and Health Risks Attributed to Rare Earth Elements in Coal Fly Ash

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