Distribution of rare earth elements in core sediments of Kolakkudi Lake, Southern India

Abstract

The lake Kolakkudi represents a small, isolated and fresh water lake situated in southern part of TamilNadu, India and it surrounded by fluvial placer deposits of garnet rich sands. In the study area to obtain information about rare earth elements (REEs) of core sediments and conceded sediment composition and distribution of rare earth elements as well as surrounding soil was investigated. The concentration of REEs in core sediments varies from 0.42 to 49.1 ppm. The higher REE content in the core sediments samples from various locations whichsignificance the plethora of clay and/or quartz with less significant effect caused by sedimentary sorting. According to the difference in the levelsof the rare earth elements, the rare earth elements normalized patterns and associated fractionation parameters (SLREE/SHREE, (La/Yb)N, and (NdYb) N) showed similarities between the lake sediments and the surrounding clays, confirming a widespread influence of nearby local lithology on the lake sediment composition. On the other hand, the results of the statistical analysis suggest the contribution of both clay rich soils and garnet rich sands in the lake sediments to the total content of rare earth elements.

Occurrence of uranium, thorium and rare earth elements in the environment: A review

“…However, uranium, thorium, and REE levels of 630, 75, and 56500 mg kg −1 , respectively, have been detected in various surface soils, with the highest levels measured in some areas of the United States of America, Bulgaria, and China (Neves et al, 2009;Caldwell et al, 2012;Mihaylova et al, 2013;Sadeghi et al, 2013;Wang and Liang, 2015;Fiket et al, 2016;Ramos et al, 2016;Han et al, 2017;Brito et al, 2018;Kaishwa et al, 2018;Santos-Francés et al, 2018;Arome et al, 2019;Wang et al, 2019a;Freitas Rodrigo et al, 2021;Wang et al, 2022;Table 5). In sediments, U, Th, and REE values of up to 126, 12, and 4000 mg kg −1 , respectively, were detected, with the highest values measured in some areas of Malaysia, Thailand, and Japan (Zhu et al, 1997;Munksgaard et al, 2003;Borrego et al, 2005;Marmolejo-Rodríguez et al, 2007;Prego et al, 2009;Tranchida et al, 2011;Deepulal et al, 2012;Antonina et al, 2013;Kritsananuwat et al, 2014;Cordeiro et al, 2016;Sahu et al, 2016;Fiket et al, 2018b;Brito et al, 2018;El-Taher et al, 2018;El-Taher et al, 2019;Elias et al, 2019;Nascimento et al, 2019;Sivasamandy et al, 2019;Bergmann and Graça, 2020;Tanaka et al, 2020;Wu et al, 2020...…”

Application of Molecular Imprinting for Creation of Highly Selective Sorbents for Extraction and Separation of Rare-Earth Elements

“… The fifth feature of REMs that needs to be distinguished is the balance problem, or the balancing problem. As in the case of uranium and thorium, the concentrations of which are very different in the ore object, the specific distributions of metals also differ significantly for each REM deposit [ 15 , 16 , 17 , 18 ]. Moreover, this distribution does not correspond to the demand of the global market for various types of high-tech products, the production of which requires REMs.…”