Geochemical characteristics and ecological risks of rare earth elements in river sediments of coal-grain composite area in eastern China

Xia, Xiang; Jiang, Chunlu; Hu, Mingyu; Li, Yanan

doi:10.1007/s10661-023-12071-2

Cited by 2 publications

(2 citation statements)

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“…However, this ecological balance is under duress due to the multifaceted impacts of rapid economic development, urbanization, and the influx of nitrogen, phosphorus, and metals. Research indicates varying degrees of REE pollution in the Huai River, which flows into Hongze Lake. ,, As these challenges intensify, the overall health of Hongze Lake becomes a focal point for scientific inquiry, prompting an in-depth exploration of the joint ecological and toxicological risks posed by sediment-bound nutrients and REEs…”

Section: Introductionmentioning

confidence: 99%

“…Hongze Lake, as China’s fourth-largest freshwater lake, holds particular prominence beyond its size. , It acts as a linchpin in regional water supply networks and serves as a critical reservoir for the South-to-North Water Diversion Eastern Route project, ensuring water security for surrounding regions. , The significance of Hongze Lake transcends its physical dimensions ,, ; it is a dynamic ecosystem with far-reaching ecological implications. However, this ecological balance is under duress due to the multifaceted impacts of rapid economic development, urbanization, and the influx of nitrogen, phosphorus, and metals.…”

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: Introductionmentioning

confidence: 99%