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标题：Evaluation of Major and Trace Elements of Orin-Ekiti Bauxitic Clay
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作者：A.O. Talabi ; A.O. Talabi ; R.O. Obasi 等
期刊名称：Research Journal of Applied Sciences
印刷版ISSN：1815-932X
电子版ISSN：1993-6079
出版年度：2018
卷号：13
期号：5
页码：306-312
DOI：10.3923/rjasci.2018.306.312
语种：English
出版社：Medwell Journals
摘要：Bauxite is the main ore from which aluminum can be extracted economically. The major and traceelements of Orin-Ekiti bauxitic clay were evaluated to ascertain its degree of lateralization, provenance andsuitability for industrial application. Twelve samples were collected and subjected to analysis employingICP-MS (Agilent 7700). Results of the analysis revealed that the bauxitic clay composed mainly ofAl2 O3 (25.57-34.19 wt.%), SiO2 (31.19-47.71 wt.%), F2 O3 (1.26-23.23 wt.%) and TiO2 (0.18-4.33 wt.%) with LOI between 13.61 and 24.71 wt.%. Alkalis and alkali earth elements showed low values probably because they havebeen leached out during chemical weathering. The oxides concentrations revealed poor grade deposit whencompared to the standard bauxite chemical composition (Al2 O3 >45%, F2 O3 <20% and SiO2 <5%) which is 2 economically mineable. Among the trace elements, Ba has the highest concentration (ppm) ranging from559.77-3389.67 followed by Sr 169.63-1327.38 and Zr between 49.32 and 1334.17. Vanadium and Ceconcentrations (ppm) ranged from 9.19- 419.48 and 49.60-1334.17, respectively. All other trace elements haveconcentrations <100 ppm. The ternary plot of Al2 O3 -F2 O3 -SiO2 revealed moderate lateralization with 75 and 25% of the samples representing bauxitic clay and silica, respectively. The binary Cr/Ni plot indicated that thebauxitic clay was of heterogeneous sources most likely from basic igneous and sedimentary rock. Orin bauxiticclay is not suitable for Al-ore beneficiation but could found uses in the production of refractory works, alumand fertilizers production.
关键词：Bauxitic clay;mobile elements;trace elements;lateritization;ternary plot;Al-ore beneficiation