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Fractionation characteristics of rare earth elements (REEs) linked with secondary Fe, Mn, and Al minerals in soils
Chunying Chang;  Fangbai Li;  Chengshuai Liu;  Jianfeng Gao;  Hui Tong;  Manjia Chen
2016
Source PublicationActa Geochimica
Volume35Issue:4Pages:329-329
Abstract

Soil secondary minerals are important scavengers of rare earth elements (REEs) in soils and thus affect geochemical behavior and occurrence of REEs. The fractionation of REEs is a common geochemical phenomenon in soils but has received little attention, especially fractionation induced by secondary minerals. In this study, REEs (La to Lu and Y) associated with soil-abundant secondary minerals Fe-, Al-, and Mn-oxides in 196 soil samples were investigated to explore the fractionation and anomalies of REEs related to the minerals. The results show right-inclined chondrite-normalized REE patterns for La–Lu in soils subjected to total soil digestion and partial soil extraction. Light REEs (LREEs) enrichment features were negatively correlated with a Eu anomaly and positively correlated with a Ce anomaly. The fractionation between LREEs and heavy REEs (HREEs) was attributed to the high adsorption affinity of LREEs to secondary minerals and the preferred activation/leaching of HREEs. The substantial fractions of REEs in soils extracted by oxalate and Dithionite-Citrate-Bicarbonate buffer solutions were labile (10 %–30 %), which were similar to the mass fraction of Fe (10 %–20 %). Furthermore, Eu was found to be more mobile than the other REEs in the soils, whereas Ce was less mobile. These results add to our understanding of the distribution and geochemical behavior of REEs in soils, and also help to deduce the conditions of soil formation from REE fractionation.

KeywordRare Earth Elements Fractionation Secondary Minerals Geochemical Process Europium Anomaly Cerium Anomaly
Indexed ByEI
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/7702
Collection环境地球化学国家重点实验室
AffiliationGuangdong Institute of Eco- Environmental and Soil Sciences
Corresponding Author Affilication中国科学院地球化学研究所
Recommended Citation
GB/T 7714
Chunying Chang;Fangbai Li;Chengshuai Liu;Jianfeng Gao;Hui Tong;Manjia Chen. Fractionation characteristics of rare earth elements (REEs) linked with secondary Fe, Mn, and Al minerals in soils[J]. Acta Geochimica,2016,35(4):329-329.
APA Chunying Chang;Fangbai Li;Chengshuai Liu;Jianfeng Gao;Hui Tong;Manjia Chen.(2016).Fractionation characteristics of rare earth elements (REEs) linked with secondary Fe, Mn, and Al minerals in soils.Acta Geochimica,35(4),329-329.
MLA Chunying Chang;Fangbai Li;Chengshuai Liu;Jianfeng Gao;Hui Tong;Manjia Chen."Fractionation characteristics of rare earth elements (REEs) linked with secondary Fe, Mn, and Al minerals in soils".Acta Geochimica 35.4(2016):329-329.
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