Probabilistic ecotoxicological risk assessment of heavy metal and rare earth element mixtures in aquatic biota using the DGT technique in coastal sediments

Gu, Yang-Guang; Wang, Yasu; Jordan, Richard W.; Su, Hong; Jiang, Shijun

doi:10.1016/j.chemosphere.2023.138592

Cited by 16 publications

(3 citation statements)

References 41 publications

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“…The second grade ((II)) is mainly applicable to the first-level protection zones of centralized domestic drinking water surface water sources, rare aquatic habitats, spawning grounds for fish and shrimp, and bait areas for fish larvae and fry, among others . HLC, Hulun Lake of China; ZLBC, Zhelin Bay of China; DYBC, Daya Bay of China; IZPREC, Intertidal zone of the Pearl River Estuary of China; XCLC, Xincun Lagoon of China; ULU, Utah Lake of USA . Due to the absence of closely related data in ULU, it is important to clarify that the concentrations referred to in ULU pertain to the water column and not the concentrations measured in sediments using the DGT technique.…”

Section: Resultsmentioning

confidence: 99%

“…Rare earth elements (REEs), which include 15 lanthanide series elements (La–Lu), scandium (Sc), and yttrium (Y), are recognized as emerging contaminants. − These elements are essential for modern technologies and clean energy production. − Their unique properties make them indispensable for advancing high-tech national defense technology and transforming traditional industries globally. ,, However, the widespread exploitation and usage of REEs have led to environmental issues, with a significant discharge into rivers and lakes, primarily accumulating in sediments. ,, …”

Section: Introductionmentioning

confidence: 99%

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Nutrients and Rare Earth Elements in Surface Sediments of Hongze Lake (China) Using the DGT Technique: Spatial Distribution Pattern and Probabilistic Risk

Gu,

Ma,

Jordan

et al. 2024

ACS EST Water

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The escalating environmental impact of rare earth elements (REEs) in freshwater ecosystems, exemplified by Hongze Lake's increasing pollution levels from sediment-bound nutrients and REEs due to human activities, necessitates a comprehensive study. Our objectives are to unravel the spatial distribution patterns of nutrients and REEs in Hongze Lake's surface sediments and assess their combined toxicity effects on aquatic biota, aiming to fill a critical gap in understanding the ecological and toxicological risks associated with these contaminants. This study employed the diffusive gradients in thin films (DGT) technique to analyze surface sediments in China's Hongze Lake for nutrients and REEs. Significant fluctuations were observed in the concentrations of phosphate (PO 4 −P), nitrate (NO 3 −N), and ammonium (NH 4 −N), with some REEs exceeding predicted no effect concentrations (PNEC) for aquatic organisms. Correlation analysis suggested complex interrelationships among these elements, indicating potential common pollution sources. Factor analysis condensed 16 variables into 4 factors, unveiling distinct spatial distribution patterns in the lake. Additionally, a probabilistic ecotoxicological risk assessment, integrating DGT-labile concentrations and toxicity data, revealed a 1.26% probability of surface sediments in Hongze Lake inducing a combined toxic effect on aquatic biota. These findings provide specific numerical insights into pollution sources and risks within the Hongze Lake ecosystem. The results offer valuable information for current and future lake management and conservation efforts.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nutrients and Rare Earth Elements in Surface Sediments of Hongze Lake (China) Using the DGT Technique: Spatial Distribution Pattern and Probabilistic Risk

Gu,

Ma,

Jordan

et al. 2024

ACS EST Water

Self Cite

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show abstract

“…Some researchers believed that the DGT-labile metals had positive relationships with the acid-soluble metals in the coastal sediment [31]. A study showed that the average values of DGT-labile Cd, Pb, Ni, Cu, Zn, and Mn were 0.78, 0.29, 0.23, 0.13, 34.2, and 12.4 µg/L, respectively, in coastal sediment in Hainan Island, South China Sea [32]. The mean DGT-labile concentrations of Cd, Pb, Ni, Cu, Zn, and Mn were 0.79, 1.46, 10.2, 2.90, 52.1, and 2328 µg/L, respectively, in the intertidal zone of the Pearl River Estuary, China [33].…”

Section: The Fractions Of Heavy Metal In Intertidal Sedimentsmentioning

confidence: 99%

Migration and Transformation of Heavy Metal and Its Fate in Intertidal Sediments: A Review

Geng,

Xia,

et al. 2024

Processes

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Intertidal sediments are rich in biological resources, which are important for material circulation and energy exchange. Meanwhile, these areas can be treated as sinks as well as sources of coastal heavy metal pollutants. Due to the influence of the tide, the intertidal sediments are in a state of periodic flooding and exposure, and environmental factors such as dissolved oxygen, salinity and overlying water pressure are changeable. Heavy metals in sediments are prone to migration and transformation with the dynamic effects of tidal water and the changes in the environment factors, which increase the bioavailability of heavy metals. In this review, the characteristics of distribution and the bioavailability of heavy metals in intertidal sediments are described; the migration and transformation behavior of heavy metals and its influencing factors under tidal conditions are analyzed; and the mechanisms of heavy metal’s migration and transformation in the intertidal zone are summarized. Moreover, the bioaccumulation of heavy metal by organisms and the remediation techniques are discussed. Therefore, this review systematically summarizes the states of existence, the transport mechanisms, and the fate of heavy metals in the intertidal sediment, fills in the research gap of the cycling of heavy metal in the intertidal zone, and provides a theoretical basis for the control of heavy metal pollution.

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Comparison of sediment bioavailable methods to assess the potential risk of metal(loid)s for river ecosystems

Álvarez,

Izquierdo,

Serrano

et al. 2024

Ecotoxicology and Environmental Safety

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Probabilistic ecotoxicological risk assessment of heavy metal and rare earth element mixtures in aquatic biota using the DGT technique in coastal sediments

Cited by 16 publications

References 41 publications

Nutrients and Rare Earth Elements in Surface Sediments of Hongze Lake (China) Using the DGT Technique: Spatial Distribution Pattern and Probabilistic Risk

Nutrients and Rare Earth Elements in Surface Sediments of Hongze Lake (China) Using the DGT Technique: Spatial Distribution Pattern and Probabilistic Risk

Migration and Transformation of Heavy Metal and Its Fate in Intertidal Sediments: A Review

Comparison of sediment bioavailable methods to assess the potential risk of metal(loid)s for river ecosystems

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