Rare earth element migration in gullies with different Dicranopteris dichotoma covers in the Huangnikeng gully group, Changting County, Southeast China

Chen, Zhiqiang; Chen, Zhibiao; Bai, Liyue

doi:10.1016/j.chemosphere.2016.08.123

Cited by 24 publications

(12 citation statements)

References 26 publications

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“…The content of a TREEs pattern is linked to the soil parent material [38,39], and the parent material in this study area is the same of coarse-grained granite, so all five soil subtypes showed similar patterns. Ample evidence has shown that REEs can be mobilized during weathering processes in the tropical and subtropical monsoon climates in southern China [23,40,41], which is why the REE content presents differences between the soil subtypes in this study. Our previous study determined that REEs migrate downhill under the influence of water flow and gravity [23].…”

Section: Resultsmentioning

confidence: 85%

“…Ample evidence has shown that REEs can be mobilized during weathering processes in the tropical and subtropical monsoon climates in southern China [23,40,41], which is why the REE content presents differences between the soil subtypes in this study. Our previous study determined that REEs migrate downhill under the influence of water flow and gravity [23]. The higher TREE contents of the hydromorphic paddy soil, percolated paddy soil, and alluvial soil than the red soil and coarse red soil are probably caused by differences of altitude.…”

Section: Resultsmentioning

confidence: 85%

“…The distribution map of TREEs presents a trend similar to the distribution trend of HREEs. The topography of the watershed is tilted from east to west, and a previous study found that REEs can migrate downhill to lower sites by water flow and gravity [23], so the high REE content area is located in the lowland of the west. The central part of the watershed is the area where soil erosion was serious [21].…”

Section: Resultsmentioning

confidence: 99%

“…TREEs is the sum of the 15 REEs; LREEs is the sum of La, Ce, Pr, Nd, Sm, and Eu; HREEs is the sum of Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y; and L/H is the ratio of LREEs and HREEs. δCe and δEu are defined as follows: where N refers to chondrite normalization [23]. The REE contents were normalized to chondrite for the purpose of comparison [24].…”

Section: Methodsmentioning

confidence: 99%

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Rare earth elements in paddy fields from eroded granite hilly land in a southern China watershed

Chen

et al. 2019

PLoS ONE

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There are large amounts of ion-adsorption rare earth resources in the granite red soil region of southern China, and exploitation of rare earth elements (REEs) has caused serious soil erosion and soil pollution in the area. In this study, the spatial variability of soil REEs in Zhuxi watershed, Changting County, southern China, was analyzed using a geostatistics method. The analysis produced several important results: (1) The content of total rare earth elements (TREEs) in the soil samples ranged from 56.04 to 951.76 mg kg−1, with a mean value of 255.34 mg kg−1, which was higher than the background value of soil in China. The REE variables showed strong positive Ce anomalies and strong negative Eu anomalies, with mean values of 2.26 and 0.44, respectively. (2) The contents of TREEs in five subtypes of the soils were different, but they had broadly similar curves of chondrite-normalized REE patterns, with steeper patterns from La to Eu and flatter patterns from Eu to Y. (3) The spatial variability of light rare earth elements (LREEs) was mainly affected by natural factors, but the spatial variabilities of heavy rare earth elements (HREEs) and TREEs were influenced by the combination of natural factors and anthropogenic factors. Soil erosion can contribute significantly to REE migration, especially for HREEs. (4) The distribution of TREEs showed that the high content of TREEs was in the lowland of the western watershed. By comparing the distributions of TREEs in paddy fields and hilly land, we found that the area with a high content of TREEs was greater in paddy fields than in hilly land, so we deduced that REEs migrate from hilly land to the paddy field and accumulate in the soil there.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Rare earth elements in paddy fields from eroded granite hilly land in a southern China watershed

Chen

et al. 2019

PLoS ONE

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“…1). This plant has a crucial role in the ecosystem, retaining nutrients and organic matter (Cohen et al, 1995); sustaining soil microclimates (Zhao et al, 2012); facilitating growth of Eucalyptus trees (Wan et al, 2014); and controlling REE migration and gully erosion (Chen et al, 2016b). To date, only the D. linearis accessions from Southern China have been recognized as a REEs hyperaccumulator (Wei et al, 2001(Wei et al, & 2005Shan et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Spatially Resolved Localization of Lanthanum and Cerium in the Rare Earth Element Hyperaccumulator Fern Dicranopteris linearis from China

Ent

Erskine

Morel

et al. 2020

Environ. Sci. Technol.

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The fern Dicranopteris linearis (Gleicheniaceae) from China is a hyperaccumulator of Rare Earth Elements (REEs), but little is known about its ecophysiology in relation to REEs. This study aimed to clarify tissue-tissue and organ-level distribution of REEs via synchrotronbased X-ray fluorescence microscopy (XFM).• The results show that La + Ce are mainly co-localized with Mn in the pinnae and pinnules, with the highest concentrations in necrotic tissues.• In the cross-sections of the pinnules, midveins, petioles and stolons La + Ce and Mn are enriched in the epidermis, vascular bundles, and pericycle (midvein). In these tissues, Mn is localised mainly in the cortex and mesophyll compared to La + Ce in these cross-sections.• We hypothesize that REEs transpiration flow in the veins is initially restricted by the pericycle between vascular bundle and cortex, whilst excess REEs are transported by evaporation and co-compartmentalized with Mn in the necrotic tissues and epidermis in an immobile form, possibly an Si-coprecipitate.

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Sedimentary characteristics of ion-adsorption rare earth elements and assessment of their resource reuse potential due to soil and water erosion in western Fujian

Xiaowei,

Xiuling,

Zhibiao

et al. 2024

Environ Monit Assess

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With severe soil and water erosion, the crucial ion-adsorption rare earth elements (REEs) have attracted much global attention. REEs play a vital role in tracing material sources and exploring sedimentary characteristics due to their unique and stable geochemistry properties. In the present work, three representational possible redeposition areas in western Fujian were selected as the study areas. The geochemical characteristics of REEs in the sediments of the study areas were evaluated to elucidate that REEs are the products of soil and water erosion and to assess their redeposition characteristics. The results of the geochemical analysis indicated that the parent rocks of the study areas are primarily upper continental felsic rocks with similar geochemical characteristics, and the sediments in the study areas are the products of migration and redeposition caused by soil and water erosion. Moreover, the statistical analysis highlighted a negative correlation between REEs and elevation as well as REEs and the relief degree on the land surface (RDLS). Thus, as a result of soil and water erosion, ion-adsorption REEs in the surface sediments migrate and redeposit in the soil and water of the downstream redeposition areas. This leads to a high re-utilization potential of REEs in the current situation of scarcity of such resources.

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Rare earth element migration in gullies with different Dicranopteris dichotoma covers in the Huangnikeng gully group, Changting County, Southeast China

Cited by 24 publications

References 26 publications

Rare earth elements in paddy fields from eroded granite hilly land in a southern China watershed

Rare earth elements in paddy fields from eroded granite hilly land in a southern China watershed

Spatially Resolved Localization of Lanthanum and Cerium in the Rare Earth Element Hyperaccumulator Fern Dicranopteris linearis from China

Sedimentary characteristics of ion-adsorption rare earth elements and assessment of their resource reuse potential due to soil and water erosion in western Fujian

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