Selective Extraction of Lithium from Native Geothermal Brines Using Lithium-ion Sieves

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from Native Geothermal Brines Using Lithium-ion Sieves</title> <meta name="description" content="Selective Extraction of Lithium from Native Geothermal Brines Using Lithium-ion Sieves"> <meta name="keywords" content="adsorption, critical minerals, DLE, geothermal brines, geochemistry, lithium, lithium-ion sieves"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img 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publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">Selective Extraction of Lithium from Native Geothermal Brines Using Lithium-ion Sieves</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Misagh%20Ghobadi">Misagh Ghobadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Rich%20Crane"> Rich Crane</a>, <a href="https://publications.waset.org/abstracts/search?q=Karen%20Hudson-Edwards"> Karen Hudson-Edwards</a>, <a href="https://publications.waset.org/abstracts/search?q=Clemens%20Vinzenz%20Ullmann"> Clemens Vinzenz Ullmann</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Lithium is recognized as the critical energy metal of the 21st century, comparable in importance to coal in the 19th century and oil in the 20th century, often termed 'white gold'. Current global demand for lithium, estimated at 0.95-0.98 million metric tons (Mt) of lithium carbonate equivalent (LCE) annually in 2024, is projected to rise to 1.87 Mt by 2027 and 3.06 Mt by 2030. Despite anticipated short-term stability in supply and demand, meeting the forecasted 2030 demand will require the lithium industry to develop an additional capacity of 1.42 Mt of LCE annually, exceeding current planned and ongoing efforts. Brine resources constitute nearly 65% of global lithium reserves, underscoring the importance of exploring lithium recovery from underutilized sources, especially geothermal brines. However, conventional lithium extraction from brine deposits faces challenges due to its time-intensive process, low efficiency (30-50% lithium recovery), unsuitability for low lithium concentrations (<300 mg/l), and notable environmental impacts. Addressing these challenges, direct lithium extraction (DLE) methods have emerged as promising technologies capable of economically extracting lithium even from low-concentration brines (>50 mg/l) with high recovery rates (75-98%). However, most studies (70%) have predominantly focused on synthetic brines instead of native (natural/real), with limited application of these approaches in real-world case studies or industrial settings. This study aims to bridge this gap by investigating a geothermal brine sample collected from a real case study site in the UK. A Mn-based lithium-ion sieve (LIS) adsorbent was synthesized and employed to selectively extract lithium from the sample brine. Adsorbents with a Li:Mn molar ratio of 1:1 demonstrated superior lithium selectivity and adsorption capacity. Furthermore, the pristine Mn-based adsorbent was modified through transition metals doping, resulting in enhanced lithium selectivity and adsorption capacity. The modified adsorbent exhibited a higher separation factor for lithium over major co-existing cations such as Ca, Mg, Na, and K, with separation factors exceeding 200. The adsorption behaviour was well-described by the Langmuir model, indicating monolayer adsorption, and the kinetics followed a pseudo-second-order mechanism, suggesting chemisorption at the solid surface. Thermodynamically, negative 螖G掳 values and positive 螖H掳 and 螖S掳 values were observed, indicating the spontaneity and endothermic nature of the adsorption process. <iframe src="https://publications.waset.org/abstracts/186911.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=critical%20minerals" title=" critical minerals"> critical minerals</a>, <a href="https://publications.waset.org/abstracts/search?q=DLE" title=" DLE"> DLE</a>, <a href="https://publications.waset.org/abstracts/search?q=geothermal%20brines" title=" geothermal brines"> geothermal brines</a>, <a href="https://publications.waset.org/abstracts/search?q=geochemistry" title=" geochemistry"> geochemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=lithium" title=" lithium"> lithium</a>, <a href="https://publications.waset.org/abstracts/search?q=lithium-ion%20sieves" title=" lithium-ion sieves"> lithium-ion sieves</a> </p> <a href="https://publications.waset.org/abstracts/186911/selective-extraction-of-lithium-from-native-geothermal-brines-using-lithium-ion-sieves" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186911.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">46</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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Selective Extraction of Lithium from Native Geothermal Brines Using Lithium-ion Sieves