قائمة الطعام
Abstract Rare earth elements (REEs) comprise a group of 17 elements with very similar chemical and physical properties, which include scandium (Sc, Z=21), yttrium (Y, Z=39), and the lanthanides with successive atomic numbers (Z from 57 to 71). ... Assessment of the bioavailability of rare earth elements in soils by chemical …
The speciation of rare earth elements in soils is experimentally defined as water soluble, exchangeable and carbonate bound (B1), Fe–Mn oxide bound (B2) and …
The study aims to review the toxicity analysis of these rare earth elements concerning aquatic biota, considering it to be the sensitive indicator of the environment. Based on the limited reports of REE effects, the review highlights the need for more detailed studies on the hormetic effects of REEs. Aquatic biota is a cheap, robust, and ...
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WEBTea ( Camellia sinensis) is a widespread beverage plant that prefers aluminum-enriched acidic soils. However, rare earth elements (REEs) might be highly …
Assessment of the bioavailability of rare earth elements in soils by chemical fractionation and multiple regression analysis. | Semantic Scholar. DOI: 10.1016/s0045-6535 …
Comparison of speciation and bioavailability of rare earth elements between wet rhizosphere soil and air-dried bulk soil @article{Wang2001ComparisonOS, title={Comparison of speciation and bioavailability of rare earth elements between wet rhizosphere soil and air-dried bulk soil}, author={Zhongwen Wang and Xiao‐quan Shan …
The accumulation of rare earth oxides (REOs) in soils is linked with application of nanoscale phosphatic fertilizers, but their effects on earthworm species are poorly understood. We investigated the impacts of nanoscale and bulk-REOs of lanthanum and ytterbium (La 2 O 3, Yb 2 O 3 ) at low (25, 50 mg kg −1 ), intermediate (100, 200 mg kg …
Assessment of the bioavailability of rare earth elements in soils by chemical fractionation and multiple regression analysis Chemosphere, 40 ( 1 ) ( 2000 ), pp. 23 - 28, 10.1016/S0045-6535(99)00225-8
Abstract. The accumulation of rare earth oxides (REOs) in soils is linked with application of nanoscale phosphatic fertilizers, but their effects on earthworm species are poorly understood.
The bioavailability of rare earth elements (REEs) in soils was evaluated, based on the combination of chemical fractionation and multiple regression analysis. REEs in soils were partitioned by a sequential extraction procedure into water soluble (F(ws)), exchangeable (F(ec)), bound to carbonates (F(cb)), bound to organic matter …
The largest rare earth elements removal occurs in the medium-chlorinity zone and it becomes extreme for heavy rare earth elements, as observed for Sc. Samples of the mixing zone show a North ...
The proposed sensor revealed good selectivity with respect to alkali, alkaline earth, some transition and rare earth metal ions. It can be used in the pH range of 2.10–9.80.
It is a daunting challenge to predict toxicity and accumulation of rare earth metals (REMs) in different exposure scenarios (e.g., varying water chemistry and metal combinations). Herein, we investigated the toxicity and uptake of La and Ce in the presence of various levels of Ca, Mg, Na, K, and at …
This review of recent and current literature deals with REEs in primary and secondary soil minerals, concentrations in surface soils, factors influencing …
The review paper mainly focuses to provide scientific literature about rare earth elements (REEs) with potential environmental and health effects in understanding the research. This is the initial review of RE speciation and bioavailability with current initiative toward development needs and research perceptive.
Around a rare-earth mining area in Guangdong Province, the soil Pb content can reach 79.33-134.54 mg/kg [81], and some studies have shown that the correlation between rare-earth elements and Pb ...
Bioavailability and biological response of nanoscale/bulk rare earth oxides in soil : Physiological and ultrastructural alterations in Eisenia fetida Muhammad Adeel a, Noman Shakoor a, Muhammad ...
The review paper mainly focuses to provide scientific literature about rare earth elements (REEs) with potential environmental and health effects in understanding the research. This is the initial review of RE speciation and bioavailability with current initiative toward development needs and research perceptive.
A mixture of malic acid and citric acid as extractant for the evaluation of plant bioavailability of rare earth elements (REEs) in soils is presented. Extractable REEs by malic-citric acid, acetic acid (CH 3 COOH), DTPA, EDTA, Mehlich 3 and total REEs in soils were compared with the REEs in winter wheat (Triticum aestivum L.) grown in the soils ...
A comparison was made between the speciation and bioavailability of rare earth elements in rhizosphere and nonrhizosphere soils and between wet and air-dried soils under greenhouse conditions by using a homemade rhizobox. The speciation of rare earth elements in soils is experimentally defined as water soluble, exchangeable …
The rise of rare earth-related industries has promoted the development of high-tech industry in the world and also brought about a series of environmental problems [5]. Nowadays, the excessive exploitation of rare earth resources and industrial effluent discharge have led to soil erosion and serious destruction of ecological environment [6–9].
Rare earth elements and bioavailability in the mangrove ecosystem have been of significant concern and are recognized globally as emerging pollutants. Bioavailabilit … Different hypotheses have been tested about the fractionation and bioavailability of rare earth elements (REE) in mangrove ecosystems.
For rare earth elements (La, Ce, Pr, Nd) the air-drying process increased the element contents in water soluble, exchangeable, carbonate bound, and Fe-Mn oxide bound fractions, whereas the ...
The rare earth elements (REEs) form a chemically uniform group and include yttrium (Y), lanthanum (La) and the lanthanides cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), …
The effect of earthworm (Eisenia fetida) activity on soil pH, dissolved organic carbon (DOC), fraction distribution pattern and bioavailability of rare earth elements (REEs) Y, La, Ce, Pr and Nd in nine Chinese soils were investigated using pot experiments. A three-step extraction procedure recommen …
Tea (Camellia sinensis) is a widespread beverage plant that prefers aluminum-enriched acidic soils.However, rare earth elements (REEs) might be highly phyto-available in these soils. With the increasing demands for REEs in high-technology industries, understanding the dynamics of REEs in the environment is essential.
Rare earth elements and bioavailability in the mangrove ecosystem have been of significant concern and are recognized globally as emerging pollutants. Bioavailability …
The effect of earthworm (Eisenia fetida) activity on soil pH, dissolved organic carbon (DOC), fraction distribution pattern and bioavailability of rare earth elements (REEs) Y, La, Ce, Pr and Nd in nine Chinese soils were investigated using pot experiments.A three-step extraction procedure recommended by the European …
Rare earth elements (REEs) are widely used in industry and the entry of REEs into the pedosphere is assumed. Data about REEs in soils are scarce since only a few studies discuss their ecologically relevant behavior. Hence, we investigated total contents (aqua regia digestion) and potentially bioavailable contents (EDTA extraction) of REEs in …
Request PDF | Rare earth elements in tea garden soils and their bioavailability to tea buds in Taiwan | Tea (Camellia sinensis) is a widespread beverage plant that prefers aluminum-enriched acidic ...
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