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pH and Eh variations and the DREEs contents of a small watershed in South Jiangxi Province

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doi: 10.15898/j.cnki.11-2131/td.2015.04.018
Authors:He Hanhan; Yu Yang; Liu Xinxing; Huang Fan; Zhao Zhi; Li Chao
Author Affiliations:Primary:
Chinese Academy of Geological Sciences, Institute of Mineral Resources, Beijing, China
China University of Geosciences, School of the Earth Sciences and Resources, China
Volume Title:Yankuang Ceshi Rock and Mineral Analysis
Source:Yankuang Ceshi = Rock and Mineral Analysis, 34(4), p.487-493. Publisher: Dizhi Chubanshe, Beijing, China. ISSN: 0254-5357
Publication Date:2015
Note:In Chinese with English summary. 19 refs.; illus., incl. 2 tables, sketch map
Summary:Knowing the pH and Eh values of stream water flowing through the rare earth element deposits can lead to an understanding of the acidity and alkalinity and oxidation-reduction environment of deposits. For this purpose, the Lianshui, Taojiang and Dongjiang rivers in South Jiangxi were selected for study. The dissolved rare earth elements (DREEs) and pH-Eh values of water samples were analyzed by Inductively Coupled Plasma Mass Spectrometry(ICP-MS) and Three-channel Multi-parameter, respectively. Conclusions are listed as follows: (1) DREEs contents range widely from several µg/L to tens of mg/L, and chondrite-normalized DREEs patterns show a slightly right-inclined trend with Eu and Ce negative anomalies. (2) The weakly negative correlations of DREEs and La contents with pH values indicate that the DREEs contents in water and distribution patterns are affected by the pH values of external environment. (3) Stream water samples flowing through stratums and ion-adsorbed type REE deposits in stratums have pH values of 7.40 and 6.94, respectively, and Eh values of -0.023 V and 6.55 mV, respectively, whereas stream water flowing through granite plutons or weathering crust ion-adsorbed type REE deposits have respective pH values of 6.61 and 4.37, and respective Eh values of 0.024 V and 0.15 V. It indicates that ion-adsorbed type REE deposits formed in a neutral-acid oxidized environment.
Subjects:Acid mine drainage; Eh; Geochemistry; Hydrochemistry; Hydrology; Metals; PH; Pollution; Rare earths; Variations; Water pollution; Watersheds; Asia; China; Far East; Jiangxi China; Dongjiang River; Lianshui River; Taojiang River
Coordinates:N263437 N263437 E1164033 E1164033
Record ID:800609-17
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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