Characterizing fluxes of trace metals related to dissolved and suspended matter during a storm event: application to a karst aquifer using trace metals and rare earth elements as provenance indicators

Cholet, Cybèle; Steinmann, Marc; Charlier, Jean‐Baptiste; Denimal, Sophie

doi:10.1007/s10040-018-1859-2

Cited by 18 publications

(12 citation statements)

References 58 publications

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“…For instance, more abundant REE in SPM are found in rivers draining igneous and metamorphic terranes than volcanic or sedimentary rocks ( Bayon et al, 2015 ). Thus, the knowledge of particulate REE provides information relevant to natural weathering erosion and river transport ( Cholet et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Distribution, fractionation and sources of rare earth elements in suspended particulate matter in a tropical agricultural catchment, northeast Thailand

Yang¹,

Han²,

Zeng³

et al. 2021

PeerJ

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Forty-eight suspended particulate matter (SPM) samples were collected from the Mun River, northeast Thailand and its junction with the Mekong River, to investigate the relationship between the distribution of rare earth elements (REE) in SPM and the soils in the watershed. The total REE contents (∑REE) in SPM in the Mun River ranged from 78.5 to 377.8 mg/kg with the average of 189.3 mg/kg, which was lower than ∑REE of 222.3 mg/kg at the Mekong River (one sample at junction). The Post Archean Australia Shale (PAAS)-normalized ratios of light REE (LREE), middle REE (MREE) and heavy REE (HREE) were averaged to 1.0, 1.3 and 1.0, which showed a clear enrichment in MREE. In short, along the Mun River, the REE contents in SPM were decreasing, and the PAAS-normalized patterns of REE showed gradually flat. The REE content in SPM and soils are highest in the upper catchment, indicating that soil/bedrock is the most important source of REE in SPM. Additionally, the positive Eu anomaly was enhanced by the higher Ca content in SPM (R = 0.45), which may be caused by more feldspars or carbonates with Ca and Eu substituting Ca. The results present the REE behaviors of SPM in the Mun River and relationship between REE in SPM and soil/bedrock, the findings may support the other studies in catchment weathering.

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Section: Introductionmentioning

confidence: 99%

Distribution, fractionation and sources of rare earth elements in suspended particulate matter in a tropical agricultural catchment, northeast Thailand

Yang¹,

Han²,

Zeng³

et al. 2021

PeerJ

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“…Additionally, the redox potential-dependent Ce anomaly ( Alderton, Pearce & Potts, 1980 ), lithology-dependent Eu anomaly ( Han et al, 2009 ), and anthropogenic pollution-dependent Gd anomaly ( Bau & Dulski, 1996 ; Louis et al, 2020 ) are the useful indexes of REE fractionation. Overall, the geochemical characteristics (including concentration and fractionation) of REEs in SPM can provide much useful information about weathering processes, hydrochemical characteristics, and anthropogenic activities ( Cholet et al, 2019 ; Smith & Liu, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Distribution and fractionation of rare earth elements in suspended particulate matter in a coastal river, Southeast China

Liu

2021

PeerJ

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Background In the river system, the geochemistry of rare earth elements (REEs, a series of elements from La to Lu) in suspended particulate matter (SPM) is generally controlled by rock weathering processes and hydrochemical characteristics, as well as being affected by anthropogenic activities. However, the variations of geochemical characteristics and behaviors of REEs in SPM with a salinity gradient from the inland river to the estuary have been short of a systematic understanding. Methods The REE concentrations, Post Archean Australia Shale (PAAS)-normalized REE, La/Yb, La/Sm, and Sm/Yb ratios of SPM were investigated in the Jiulongjiang River, which is a coastal river mainly flowing through granite rocks in Southeast China. The correlation relationships between physicochemical parameters (including water pH, total dissolved solids (TDS), HCO3– concentrations, and the concentrations of major elements of SPM) and PAAS-normalized REE ratios of SPM were analyzed to determine the factors that affect the REE concentration and fractionation of SPM in the different regions of Jiulongjiang River, including the main stream and tributary of Beixi River, Xixi River, Nanxi River, and estuary. Additionally, the Ce, Eu, and Gd anomalies of SPM were estimated. Results The average ∑REE concentration of SPM (352 mg/kg) in the granite rock basin was twice higher than the mean value (175 mg/kg) of the world’s rivers. The PAAS-normalized REE ratios of SPM in the main rivers including Beixi River (main stream), Xixi River, and Nanxi River were near due to the same lithologic distribution. In the tributary of Beixi River, the input of low-weathered carbonate minerals which contain very few REE caused the lower REE concentrations of SPM. The PAAS-normalized REE ratios of SPM in the estuary were significantly lower than those in the main rivers, which was mainly attributed to the significant REE removal with the increment of salinity. The enrichment of LREE relative to HREE in SPM increased with decreasing water pH in the main rivers. In the estuary, the preferential removal of dissolved LREE occurred compared to HREE with the increment of salinity. The negative Ce and Eu anomalies of SPM occurred in both the main rivers and estuary region and rare Gd pollution was present in the basin. Additionally, human activities caused the increment of REE concentrations and more negative Ce anomaly at some specific sites, such as dam effect and agricultural pollution. Conclusions The REE concentrations and fractionations of SPM in river water mainly depend on lithologic distribution and riverine pH, while they are affected by salinity in the estuary.

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“…In addition, wetting/drying cycles in the vadose zone have attracted interest, concerning the mobility of organic nanoparticles/colloids [ 4 ], and the nanoparticle composition and element redox state can significantly change, especially in karst systems, due to seasonal variations [ 5 ]. More pronounced changes, due to extreme weather events, potentially triggered by climate change, have been observed [ 6 ]. The generation of these nanoparticles based on the nucleation and growth theory (classical or non-classical crystallization pathway) for the formation of nanoparticles in natural systems is still a matter of debate.…”

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confidence: 99%

Nano Geochemistry

2022

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Characterizing fluxes of trace metals related to dissolved and suspended matter during a storm event: application to a karst aquifer using trace metals and rare earth elements as provenance indicators

Cited by 18 publications

References 58 publications

Distribution, fractionation and sources of rare earth elements in suspended particulate matter in a tropical agricultural catchment, northeast Thailand

Distribution, fractionation and sources of rare earth elements in suspended particulate matter in a tropical agricultural catchment, northeast Thailand

Distribution and fractionation of rare earth elements in suspended particulate matter in a coastal river, Southeast China

Nano Geochemistry

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