Extraction of Valuable Elements from Salt Lake Brine

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Processing and Extractive Metallurgy".

Deadline for manuscript submissions: 31 October 2025 | Viewed by 693

Special Issue Editors


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Guest Editor
Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China
Interests: lithium extraction from salt lake; flotation of low-rank coal; disposal of high-salt wastewater

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Guest Editor
State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
Interests: lithium extraction by electrochemical adsorption/desorption; solar thermal desalination; lithium extraction from salt lakes by solid phase extraction
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Interests: solvent extraction; recycling; valuable metals

Special Issue Information

Dear Colleagues,

As early as the 20th century, scholars began conducting a large number of studies on the genesis and evolution of salt lakes, salt lake biology, sedimentary environments, salt lake water chemistry, resource exploitation, and other aspects, and have accumulated fruitful results. Salt lake brine is rich in natural salt resources, which are important in the chemical industry, agriculture, and energy. Therefore, interest in the development of salt lake brine has also increased. The reserves and quality of salt mineral resources, such as magnesium, sodium, potassium, lithium, boron, rubidium, gallium, cesium, and uranium, enriched in salt lakes play an important role in the world. With the rapid development of the global economy and the continuous development of new science and technology, the strategic value of salt lake brine has become increasingly prominent. Many innovative ideas and research on the sustainable and efficient development and utilization of salt lake resources have also been put forward by human beings, which is extremely important for the efficient development and utilization of salt lake brine. This Special Issue aims to introduce the latest advances in the development and utilization of various valuable elements in salt lake brine. Combined research of the related specific fields (e.g., salt lake chemistry, hydrometallurgy, environmental engineering, etc.) can provide important information concerning the development and utilization of valuable elements in salt lake brine, illustrating the progress of global salt lake brine development.

This Special Issue invites submissions that include original scientific research related to the development of salt lake brine from well-known and/or new localities worldwide. This Special Issue focuses on the following topics: (1) the introduction of salt lake brine and advanced production technology; (2) the study of efficient extraction and mechanisms of valuable elements from salt lake brine; and (3) the development of functional materials based on valuable elements of salt lake brine.

Dr. Enze Li
Dr. Jie Ding
Dr. Feng Jiang
Guest Editors

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Keywords

  • solution chemistry of salt lake brine
  • separation technologies of valuable elements
  • interface regulation and process intensification
  • material flow analysis of valuable elements

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Published Papers (1 paper)

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Research

13 pages, 2780 KB  
Article
Enhancement on KCl Flotation at Low Temperature by a Novel Amine-Alcohol Compound Collector: Experiment and Molecular Dynamic Simulation
by Bo Wang, Jintai Tian, Biao Fan, Xin Wang and Enze Li
Minerals 2025, 15(8), 862; https://doi.org/10.3390/min15080862 - 15 Aug 2025
Viewed by 279
Abstract
To address the challenges of low KCl recovery and high collector consumption during flotation at low temperature, a novel approach with utilizing a compound collector consisting of octadecylamine hydrochloride (ODA) and alcohols (butanol, octanol, and dodecanol) to enhance low-temperature KCl flotation recovery was [...] Read more.
To address the challenges of low KCl recovery and high collector consumption during flotation at low temperature, a novel approach with utilizing a compound collector consisting of octadecylamine hydrochloride (ODA) and alcohols (butanol, octanol, and dodecanol) to enhance low-temperature KCl flotation recovery was proposed in this study. The flotation performance and underlying mechanisms of this novel amine–alcohol compound collector were investigated through combination of micro-flotation tests, contact angle measurements, and molecular dynamics simulations. The results revealed that KCl flotation recovery decreased with declining temperature using single ODA as the collector, and the maximum KCl flotation recovery was approximately 40% with an ODA concentration of 1 × 10−5 mol/L at the temperature of 0 °C. Moreover, amine–alcohol compound collector shows different KCl flotation recovery; among them, dodecanol (DOD) presents the best performance at 25 °C with an ODA concentration of 3 × 10−6 mol/L. The KCl flotation recovery initially increased and then gradually decreased with increasing the DOD concentration, and 90% KCl recovery was achieved with a DOD concentration of 1.5 × 10−5 mol/L (DOD:ODA = 5:1 in mole) under 25 °C. Furthermore, this compound collector exhibited high selectivity for KCl/NaCl flotation. Mechanism studies indicated that the trend in contact angle changes on the KCl crystal surface closely mirrored the trend in flotation recovery. Molecular dynamics simulations demonstrated that at 0 °C, the presence of DOD resulted in a higher diffusion coefficient for ODA molecules compared to the system without DOD. Additionally, the water molecules in System 3 exhibited a lower diffusion coefficient and a greater number of hydrogen bonds. This novel compound collector offers a potential solution for improving KCl recovery and reducing ODA consumption during low-temperature flotation. It holds significant theoretical and practical implications for advancing low-temperature KCl flotation technology. Full article
(This article belongs to the Special Issue Extraction of Valuable Elements from Salt Lake Brine)
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