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Title (Primary) A sequential extraction procedure to evaluate the mobilization behavior of rare earth elements in soils and tailings materials
Author Mittermüller, M.; Saatz, J.; Daus, B.
Journal Chemosphere
Year 2016
Department ANA
Volume 147
Page From 155
Page To 162
Language englisch
Keywords Leachability; Fractionation; Bioavailability; ICP-MS; REE; BCR sequential extraction procedure
UFZ wide themes RU4;
Abstract A novel sequential extraction method for evaluation of the mobilization behavior of rare earth elements in soils and mine tailings materials is presented. The sequence consists of the following four steps: 0.05 mol L−1 calcium nitrate (easily soluble and ion exchange fraction), 0.1 mol L−1 citric acid (fraction mobilized by complexation and carbonate bound), 0.05 mol L−1 hydroxylamine hydrochloride (pH = 2) (reducible fraction), 1.4 mol L−1 nitric acid (acid soluble fraction). The procedure was optimized with a certified soil material and a mine tailings material and was applied to eight samples of a soil profile. The different results obtained by using either the developed method or the widespread used BCR-Method for comparison are discussed. There were clear advantages using the newly created sequential extraction procedure in getting more detailed information about the bioavailable fraction and a fraction addressing REE phosphates.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=16956
Mittermüller, M., Saatz, J., Daus, B. (2016):
A sequential extraction procedure to evaluate the mobilization behavior of rare earth elements in soils and tailings materials
Chemosphere 147 , 155 - 162