Rare earth elements in lake sediments record historic environmental influences from anthropogenic activities

Ecological Indicators, Journal Year: 2024, Volume and Issue: 159, P. 111680 - 111680

Published: Feb. 1, 2024

Sediment concentrations of rare earth elements (REEs) can reflect aquatic system impact from anthropogenic activities, especially in small lakes characterized by high sensitivity. However, the literature on REEs sediment profiles is limited, impeding a comprehensive understanding historical influence activities urban environments. In this investigation, we examined spatial distribution and fractionation sediments Aha Lake, karst lake. The results reveal that average contents surface ranged 76.88 to 181.38 mg/kg. Light (LREEs) comprised > 80 % total almost all sediments, indicating distinct enhancement terrestrial source influx derived LREE-rich material. Negative Eu anomalies, weak positive Ce anomalies may be attributed oxidizing conditions. ΣREEs display declining tendency lake's border its center, primarily influenced human activities. Vertical distributions most core consistently vary with depth, showing decrease at 10–20 cm higher 20–30 cm. Additionally, UCC-normalized REE patterns are observed depths 0–30 reflecting contemporary environmental changes various sampling sites. coal mining content found than development only. Moreover, bivariate (La/Sm)UCC - (La/Yb)UCC plot effectively differentiates depositional origin different layers locations, such as those associated wastewater deposition deposition. This study provides valuable insights into variations water environments due utilizing sensitive levels lake sediments.

Language: Английский

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Water chemistry and estimation of local geochemical background values of elements in headwater streams of Ken–Betwa catchment of Yamuna River, India

Environmental Earth Sciences, Journal Year: 2025, Volume and Issue: 84(2)

Published: Jan. 1, 2025

Language: Английский

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The urbanization impacts on potentially toxic metals: the distribution, sources and contamination risks in river situated in typical megacity, China

Sustainable Cities and Society, Journal Year: 2023, Volume and Issue: 97, P. 104784 - 104784

Published: July 8, 2023

Language: Английский

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Water Chemical Characteristics and Water Quality Evaluation of the River under the Ecological Water Replenishment: A Case Study in the Yongding River Basin in North China

ACS Earth and Space Chemistry, Journal Year: 2023, Volume and Issue: 7(8), P. 1505 - 1515

Published: July 17, 2023

Ecological water replenishment projects have been implemented in the Yongding River (YDR) Basin since 2019 to adjust contradiction between regional ecology and social development. To clarify chemistry, sources of riverine solutes, quality assessment YDR under ecological replenishment, concentrations major ions (Na+, K+, Ca2+ Mg2+, SO42–, HCO3–, Cl–, NO3–) collected August 2021 are determined. The dominant chemical type was SO42–·Cl––Na+. Anthropogenic activities were factors affecting making up 71% total cations, main urban domestic sewage inputs. According evaluation irrigation quality, facing a low-level sodium hazard moderate salinity hazard, harm soil aggregates limited according irrigation. health threats adult residents YDR, while potential risks for children remained. improve function with significant effects observed near outlets, leading improvement quality. This study highlights disturbance characteristics restoration dry-up river provides valuable example further studies chemistry replenishment.

Language: Английский

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Multivariate Strategy for Understanding Soil Features from Rare-Earth Element Profiles: A Focus on Data Normalization

ACS Measurement Science Au, Journal Year: 2025, Volume and Issue: 5(2), P. 189 - 198

Published: March 5, 2025

The interest in assessing the behavior of rare-earth elements (REE) natural environment is constantly increasing due to their numerous applications both environmental and technological fields. However, current methodologies for analyzing REE distributions are based on normalization concentration profiles lithological values, potentially resulting different outcomes depending which values used normalization, affecting interpretability data. present work proposes an alternative approach by applying principal component analysis (PCA) create chemometric maps. data compression allows visualization distribution using a red-green-blue (RGB) color scale (PC1 = red channel; PC2 green PC3 blue channel) directly geographical map, reflecting chemical properties elements. This highlights similarities differences compositional soils, facilitating leading new insights related seemingly unrelated samples. Additionally, PCA applied soil variables correlates with patterns provides deeper into unsupervised manner, enhancing interpretation characteristics implementing ability monitor changes study evolution processes. Of particular significance fact that proposed methodology non-normalized yields results consistent those derived from normalized sets. Therefore, this not only overcomes challenges but also supports classical methodological perspective, paving way broader applications.

Language: Английский

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Source, Transport, and Fractionation of Rare Earth Elements in Fluvial Sediments from a Typical Small Urban Basin (East Tiaoxi River, Eastern China)

Water, Journal Year: 2025, Volume and Issue: 17(9), P. 1279 - 1279

Published: April 25, 2025

As emerging contaminants, rare earth elements (REEs) have undergone significant anthropogenic enrichment in aquatic systems. This study investigates the REE concentrations, major metal elements, and grain size surface sediments from East Tiaoxi (ETX) River eastern China, a small urban river subjected to substantial influences. Total concentrations of ranged 133.62 222.92 mg/kg with MREE HREE depletion. concentration fractionation were strongly correlated Ca, Fe, Mg, Mn, which may reflect control clay minerals, Fe-Mn oxides, specific heavy differences behavior between riparian riverbed highlighted impact hydrodynamic sorting chemical weathering on distribution. Anthropogenic activities, particularly urbanization, found increase especially at urban-adjacent sites (e.g., RBS2 RS2), while natural processes such as soil transport primarily contributed variation other sites. The factor ecological risk assessment revealed that moderate risks associated REEs occurred adjacent urbanized areas, though agricultural impacts less pronounced. findings emphasize combined influence urbanization distribution ETX basin underscore need prioritize urban-derived contamination environmental management strategies.

Language: Английский

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Rare earth elements and yttrium in Polish rivers and the input of anthropogenic gadolinium into the Baltic Sea

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126370 - 126370

Published: May 1, 2025

Due to their use in enabling technologies, rare earth elements and yttrium (REY) have become environmental contaminants, anthropogenic Gd from Gd-based contrast agents (GBCAs) used medical diagnostics has a worldwide concern. Contamination of coastal seawater with GBCAs previously been documented for the North Sea outflow Baltic Sea. However, source(s) this are not yet known. Hence, we investigated REY distribution Polish rivers Oder Vistula (and some tributaries), which by discharge sixth second largest that enter Large positive anomalies (GdSN/Gd*SN: 4.92 44.6) all studied reveal presence makes up >90% total inventory these rivers. Ultrafiltration shows is truly dissolved associated nanoparticles colloids. its physical speciation marked highly particle-reactive geogenic REY. As released wastewater treatment plants, strongly suggests high probability contamination other waste water-derived substances such as pharmaceuticals, endocrine disruptors hormones. If artificial groundwater recharge surface water would be applied counterbalance reduced rainfall due climate change, detrimental effects on drinking quality. removed during estuarine mixing, transport significant amounts into A rough estimate annual flux alone account input about 1 tonne per year. Our findings underline need continuous monitoring protect human health ecological integrity

Language: Английский

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Recovery of Rare Earth Elements (REEs) From Different Sources of E‐Waste and Their Potential Applications: A Focused Review

Geological Journal, Journal Year: 2025, Volume and Issue: unknown

Published: May 11, 2025

ABSTRACT The rapid use of electrical and electronic devices due to their wide applications in various fields produces a large amount e‐waste (electronic waste) the modern world. To overcome this problem, there is need recycle used product into useful products from e‐waste. Therefore, approach essential for development advanced technologies recovery separation REEs (rare earth elements) Here, are sometimes referred as “vitamins” industry. E‐waste can contribute significantly REE pollution since it frequently handled hazardously contains high amounts REEs. Apart harmful effects on environment, these wastes also destroy precious materials such gold, silver, copper, platinum, palladium, rare elements. Every year, 50 million tons generated worldwide. A goes waste only 20% properly approaches, including bioleaching, biosorption, siderophores, pyrometallurgical, hydrometallurgical processes, have been reported numerous studies elements (REEs) waste. This review paper provides an overview introduction, characteristics, sources, clean green energy technologies. current pathways production point out significant deficiencies methods currently emphasise areas where multidisciplinary research may lead more practical solutions. summary impact health environment. challenges, gap, future directions suggestions at end paper.

Language: Английский

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Gadolinium: a review on concentrations and impacts in marine and coastal systems

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126453 - 126453

Published: May 1, 2025

Language: Английский

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RARE-EARTH elements in the topsoils of a Russian industrial city: Sources and human health risk assessment

Chemosphere, Journal Year: 2024, Volume and Issue: 357, P. 142059 - 142059

Published: April 21, 2024

Language: Английский

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