scholarly journals Uranium Vertical and Lateral Distribution in a German Forested Catchment

Forests ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1351
Author(s):  
Yajie Sun ◽  
Bei Wu ◽  
Inge Wiekenkamp ◽  
Annemieke M. Kooijman ◽  
Roland Bol
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Three Dimensional ◽  
Nutrient Elements ◽  
Forested Catchment ◽  
Geological Origin ◽  
Western Germany ◽  
Baseline Levels ◽  
Positive Correlations

The natural measurements of uranium (U) are important for establishing natural baseline levels of U in soil. The relations between U and other elements are important to determine the extent of geological origin of soil U. The present study was aimed at providing a three-dimensional view of soil U distribution in a forested catchment (ca. 38.5 ha) in western Germany. The evaluated data, containing 155 sampled points, each with four major soil horizons (L/Of, Oh, A, and B), were collected from two existing datasets. The vertical U distribution, the lateral pattern of U in the catchment, and the occurrence of correlations between U and three groups of elements (nutrient elements, heavy metals, and rare earth elements) were examined. The results showed the median U concentration increased sevenfold from the top horizon L/Of (0.14 mg kg−1) to the B horizon (1.01 mg kg−1), suggesting a geogenic origin of soil U. Overall, soil U concentration was found to be negatively correlated with some plant macronutrients (C, N, K, S, Ca) but positively with others (P, Mg, Cu, Zn, Fe, Mn, Mo). The negative correlations between U and some macronutrients indicated a limited accumulation of plant-derived U in soil, possibly due to low phytoavailability of U. Positive correlations were also found between U concentration and heavy metals (Cr, Co, Ni, Ga, As, Cd, Hg, Pb) or rare earth elements, which further pointed to a geogenic origin of soil U in this forested catchment.

Phosphoric acid purification sludge: Potential in heavy metals and rare earth elements

2019 ◽  
Vol 83 ◽  
pp. 46-56 ◽  
Author(s):  
Marzougui Salem ◽  
Radhia Souissi ◽  
Fouad Souissi ◽  
Noureddine Abbes ◽  
Jacques Moutte
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Phosphoric Acid ◽  
Rare Earth Elements

scholarly journals Tracing method of Rare Earth Elements in surrounding rock of geological formation based on three-dimensional positioning algorithm

2021 ◽  
Vol 25 (1) ◽  
pp. 21-28
Author(s):  
Yan Lv ◽  
Laijun Lu ◽  
Mengxue Cao
Keyword(s):  
Mass Spectrometry ◽  
Rare Earth ◽  
Mass Spectrum ◽  
Rare Earth Elements ◽  
Earth Element ◽  
Three Dimensional ◽  
Test Sample ◽  
Surrounding Rock ◽  
Geological Formation ◽  
Positioning Algorithm

Because of the interference of mass spectrum and non-mass spectrum, the tracing accuracy of rare earth elements in the surrounding rock of geological formation is low. Pretreatment of test sample reagent, dissolution of test sample residue, characterization of rare earth element doped materials, analysis of mass spectrometry and non-mass spectrometry interference in rare earth element tracking, using three-dimensional positioning algorithm to track rare earth elements in geological strata surrounding rock. In the experiment, five samples of surrounding rock of geological strata are selected as experimental indexes. The experimental results show that the tracking accuracy of four rare earth elements is high.

Heavy metals and rare earth elements distribution in the brine fields of awe, keana and giza, central benue trough, Nigeria

2019 ◽  
Vol 157 ◽  
pp. 103514
Author(s):  
Obialo Solomon Onwuka ◽  
Nuhu Degree Umar ◽  
Olufemi Victor Omonona ◽  
Ibrahim Giza Idris
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Benue Trough ◽  
Rare Earth Elements Distribution

Green chemistry and sustainable development: approaches to chemical footprint analysis

2018 ◽  
Vol 90 (1) ◽  
pp. 143-155 ◽  
Author(s):  
Natalia P. Tarasova ◽  
Anna S. Makarova ◽  
Stanislav F. Vinokurov ◽  
Vladimir A. Kuznetsov ◽  
Pavel I. Shlyakhov
Keyword(s):  
Heavy Metals ◽  
Sustainable Development ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Regional Scale ◽  
Small Water ◽  
Federal Districts ◽  
Footprint Analysis ◽  
Development Goals ◽  
The Impact

AbstractThe methods to monitor the distribution of chemicals in the biosphere and to estimate the impact of chemicals on the biosphere are necessary to reach Sustainable Development Goals (SDGs). The paper presents the examples of methods to measure the concentration of heavy metals (including rare earth elements) and to rank them by the level of hazard to human health on different scales. The megacity scale presents the investigation of the impact of heavy metals on the small water bodies using water contamination index (WCI); and the investigation of snow contamination to estimate the level of short-term seasonal emission of heavy metals and rare earth elements. The 2nd part of the paper presents approaches to mitigate the exposure to mercury on the regional scale: the estimation of the current concentrations of mercury in atmospheric air, natural soils, and fresh waters using UNEP/SETAC USEtox model, as well as the estimations of the variations in the concentrations of mercury for the year 2045 in the federal districts of the Russian Federation, based on representative concentration pathways (RCPs) scenario and Minamata Convention scenario.

scholarly journals Levels of heavy metals and rare earth elements in electronic waste workers in an informal waste recycling site in Ghana

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
S.A. Takyi ◽  
N. Basu ◽  
J. Arko-Mensah ◽  
K. Houessionon ◽  
P. Botwe ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Electronic Waste ◽  
Waste Recycling

scholarly journals Environmental hazard of loparite ore dressing tailings

2021 ◽  
Vol 247 ◽  
pp. 01044
Author(s):  
EA Krasavtseva ◽  
VV Maksimova ◽  
DV Makarov
Keyword(s):  
Heavy Metals ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Soil Water ◽  
Atmospheric Precipitation ◽  
Environmental Hazard ◽  
Dust Particles ◽  
Pollutant Concentrations ◽  
Maximum Permissible Concentrations ◽  
Light Group

Mobilization of environmentally hazardous elements from loparite ore tailings when exposed to various leaching agents was studied in laboratory conditions. Leaching of pollutants from fresh tailings when exposed to atmospheric precipitation and the processes of interaction of mature tailings dust particles (-0.071 mm) with soil water were examined. It was found that in both cases, there is an intensive decomposition of the minerals making up the tailings and conversion of heavy metals (Zn, Mn, Sr) and rare earth elements of the light group (La - Sm) into a dissolved, and therefore bioavailable form. At the same time, the pollutant concentrations were many times higher than the maximum permissible concentrations for fishery water bodies. The results of the experiments indicate the environmental hazard associated with loparite ore concentration tailings due to the pollution of environment with heavy metals and rare earth elements released when the tailings interact with rainwater and soil water.

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