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International Seminar on Mineral and Coal Technology IOP Publishing IOP Conf. Series: Earth and Environmental Science 882 (2021) 012003 doi:10.1088/1755-1315/882/1/012003 Lithium recovery from synthetic geothermal brine using electrodialysis method V S H Sujoto1, Sutijan1, W Astuti2, F R Mufakhir2 and H T B M Petrus1,3* 1 Department of Chemical Engineering (Sustainable Mineral Processing Research Group), Faculty of Engineering, Universitas Gadjah Mada, Jalan Grafika No. 2 Kampus UGM Bulaksumur, D. I. Yogyakarta 55281, Indonesia 2 Research Unit for Mineral Technology, Indonesian Institute of Sciences (LIPI), Jl. Ir. Sutami Km. 15, Tanjung Bintang, Lampung Selatan, Lampung, 35361, Indonesia 3 Unconventional Geo-resources Research Group, Faculty of Engineering, Universitas Gadjah Mada, Jalan Grafika No. 2 Kampus UGM Bulaksumur, D. I. Yogyakarta 55281, Indonesia *Corresponding email: bayupetrus@ugm.ac.id Abstract. The demand of lithium in the global market is experiencing a significant increase. The electric vehicle era is the driving force of this lithium increase phenomenon. Although the demand of lithium continues to increase every year, the available lithium resources are still not able to meet the demand, so that lithium resources with much greater potential are being considered. The main objective of this study is to extract lithium from a primary resource, geothermal brine, with a practical and environmentally friendly method. Research on the extraction of lithium resources from synthetic geothermal brine with a specific lithium composition using the electrodialysis (ED) method has been carried out. The ED device used is provided with electricity and is operated using temperature variations (30°C and 40°C) and variations in electric voltage (2 V and 4 V). The highest flux is achieved at an operating temperature of 40°C and a power supply voltage of 4 V. 1. Introduction Lithium is a mineral resource that plays a critical role in various aspects of people's lives in the world, such as industry and daily life. Lithium has been widely used in making glass, ceramics, batteries, and other industries. Lithium has various uses, but its abundance in nature is only 0.0018% [1]. The demand for lithium in the global market is experiencing a rapid increase due to its increasing use. The need for lithium is expected to continue to grow and dramatically in the coming years as various lithium batteries are the most promising candidates for powering electric vehicles [2]. Lithium consumption in the world continues to increase, reaching more than 100,000 tons of lithium carbonate per year. It is estimated that by 2025 lithium consumption can get more than 160,000 tons of lithium carbonate per year [3]. Currently, 2/3 of the world's lithium is obtained from brine extraction, half a million liters of brine per ton of lithium carbonate [4]. Although the demand for lithium is huge, lithium resources are still unable to meet this demand, so that a much larger lithium resource is being considered. Lithium extraction from nature has become a trend in the lithium extraction industry due to its low cost and abundant availability. Lithium reserves are currently estimated at 14 million tons; 70-80% of Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd 1PDF Image | Lithium recovery synthetic geothermal brine electrodialysis
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