Geochemical fractions of rare earth elements in two floodplain soil profiles at the Wupper River, Germany

Geoderma ◽  
2014 ◽  
Vol 228-229 ◽  
pp. 160-172 ◽  
Author(s):  
Julia Mihajlovic ◽  
Hans-Joachim Stärk ◽  
Jörg Rinklebe
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Soil Profiles ◽  
Floodplain Soil ◽  
Geochemical Fractions

Rare earth elements in soil profiles of various ecosystems across Germany

2019 ◽  
Vol 102 ◽  
pp. 197-217 ◽  
Author(s):  
Julia Mihajlovic ◽  
Albrecht Bauriegel ◽  
Hans-Joachim Stärk ◽  
Niko Roßkopf ◽  
Jutta Zeitz ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Soil Profiles

scholarly journals Geochemical Distribution Characteristics of Rare Earth Elements in Different Soil Profiles in Mun River Basin, Northeast Thailand

2020 ◽  
Vol 12 (2) ◽  
pp. 457 ◽  
Author(s):  
Wenxiang Zhou ◽  
Guilin Han ◽  
Man Liu ◽  
Chao Song ◽  
Xiaoqiang Li
Keyword(s):  
Rare Earth ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Rare Earth Elements ◽  
River Basin ◽  
Soil Ph ◽  
Enrichment Factors ◽  
Soil Profiles ◽  
Distribution Characteristics ◽  
Northeast Thailand

Exploring the distributions of rare earth elements (REEs) in soil profiles is essential to understanding how natural and anthropogenic factors influence the geochemical behaviors of REEs. This study aimed to learn about the distribution characteristics of REEs in soils, including their fractionation and enrichment, and to explore the influence of soil pH and soil organic carbon (SOC) on REEs. One hundred and three samples were collected from six soil profiles under different land uses (paddy field: T1, T3; forest land: T2, T6; wasteland: T4; building site: T5) in the Mun River Basin, Northeast Thailand. The average total REE contents (∑REE) are much lower (<80 mg kg−1) than that of Earth’s crust (153.80 mg kg−1) in soil profiles T2, T3, T4, and T6. The contents of REEs tend to increase slightly with depth in all soil profiles. The ratios of (La/Yb)N range from 0.35 to 0.96 in most samples, indicating that the enrichment of heavy REEs (HREEs) relative to light REEs (LREEs) is the main fractionation pattern. Samples from profile T2 show relatively obvious negative Ce anomalies (0.55–0.78) and positive Eu anomalies (1.41–1.56), but there are almost no anomalies of Ce and Eu in other soil profiles. Enrichment factors of LREEs (EFLREEs) range from 0.23 to 1.54 and EFHREEs range from 0.34 to 2.27, which demonstrates that all soil samples show no LREE enrichment and only parts of samples show minor HREE enrichment. Soil organic carbon (SOC) contents positively correlate with the enrichment factors of REEs (EFREE) in soil profiles T1 (R = 0.56, p < 0.01) and T6 (R = 0.71), while soil pH values correlate well with EFREE in soil profiles T2 (R = 0.75) and T4 (R = −0.66, p < 0.01), indicating the important influence of soil pH and SOC on the mobility of REEs in some soil profiles.

Rare Earth elements in rocks and soil profiles of a tropical volcanic archipelago in the Southern Atlantic

CATENA ◽  
2020 ◽  
Vol 194 ◽  
pp. 104674 ◽  
Author(s):  
Marina Monteiro Feitosa ◽  
Ygor Jacques Agra Bezerra da Silva ◽  
Caroline Miranda Biondi ◽  
Vanja Coelho Alcantara ◽  
Clístenes Williams Araújo do Nascimento
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Soil Profiles

scholarly journals Geochemical Behaviors of Rare Earth Elements (REEs) in Karst Soils under Different Land-Use Types: A Case in Yinjiang Karst Catchment, Southwest China

2021 ◽  
Vol 18 (2) ◽  
pp. 502
Author(s):  
Ruiyin Han ◽  
Zhifang Xu
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Southwest China ◽  
Secondary Forest ◽  
Soil Samples ◽  
Soil Profiles ◽  
Agricultural Activities ◽  
Soil Environment ◽  
Forest Land ◽  
Abandoned Cropland

The geochemical characteristics of rare earth elements (REEs) can be employed to identify the anthropogenic and natural influence on the distributions of REEs in soils. A total of 47 soil samples from the three soil profiles of the secondary forest land, abandoned cropland, and shrubland in the Yinjiang county of Guizhou province, southwest China, were collected to determine the contents and distribution of REEs in the soil environment. The total REEs (ΣREE) contents in different soil profiles are in the following sequence: secondary forest land (mean: 204.59 mg·kg−1) > abandoned cropland (mean: 186.67 mg·kg−1) > shrubland (mean: 139.50 mg·kg−1). The ratios of (La/Gd)N and (Gd/Yb)N ranged from 0.62 to 1.00 and 1.18 to 2.16, which indicated that the enrichment of the medium rare earth elements (MREEs) was more obvious than that of the light rare earth elements (LREEs) and the heavy rare earth elements (HREEs). The phenomenon could be attributed to the preferential absorption of MREEs by fine particles and the substitution of Ca2+ by MREEs. Most soil samples were characterized by the negative Ce anomalies (anomalies values: 0.30–1.10) and positive Eu anomalies (anomalies values: 0.43–2.90). The contents of REEs in the profiles of secondary forest land and shrubland were mainly regulated by soil pH and Fe contents while clay content and agricultural activities were the main controlling factors in the soil profile of abandoned cropland. This study highlights the role of agricultural activities in affecting the distributions of REEs in karst soils, which could provide some insights for the protection of the soil environment.

Distribution of rare earth elements in sewage-irrigated soil profiles in Tianjin, China

2012 ◽  
Vol 30 (6) ◽  
pp. 609-613 ◽  
Author(s):  
Zhaozhou ZHU ◽  
Zhongliang WANG ◽  
Jun LI ◽  
Yong LI ◽  
Zhigang ZHANG ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Soil Profiles

Rare earth elements and their release dynamics under pre-definite redox conditions in a floodplain soil

Chemosphere ◽  
2017 ◽  
Vol 181 ◽  
pp. 313-319 ◽  
Author(s):  
Julia Mihajlovic ◽  
Hans-Joachim Stärk ◽  
Jörg Rinklebe
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Redox Conditions ◽  
Floodplain Soil
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