Study on the structure-performance relationship between binder types and aluminum-based lithium adsorbent.

IF 4.2 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Frontiers in Chemistry Pub Date : 2025-09-26 eCollection Date: 2025-01-01 DOI:10.3389/fchem.2025.1628941

Ben Ma, Xiaoyu Wang, Jing Zhou, Lijuan Zhang, Ruibin Liu, Li Su, Wenlong Wang, Qinglei Wang, Ping Li, Xuehui Shangguan, Faqiang Li

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Abstract

Aluminum lithium layered double hydroxides adsorbents (Li/Al-LDH) are used in industry due to their mild adsorption/desorption conditions, good stability and low cost. However, traditional powdered aluminum lithium adsorbents exhibit poor fluidity and a relatively high dissolution rate. The granulation strategy using binders is employed to address the aforementioned challenges. Nevertheless, there is a lack of systematic research on the relationship between the type of binder and the adsorption and desorption efficiency, as well as the kinetics and thermodynamic mechanisms of mass transfer. This work focuses on the structure-activity relationship between adsorbents and three binders (polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF) and calcium alginate (SA)). The experimental results demonstrate that the adsorption/desorption performance of the adsorbent varied significantly with temperature depending on binder type. It is noted that the structures of PVDF-LDH and PVC-LDH changed during temperature changes, resulting in decreased adsorption and desorption performance. While the SA-LDH can maintain good structural stability and adsorption and desorption capabilities. Besides, in 300 ppm LiCl solution, SA-LDH presents a high adsorption and desorption capacity, with the maximum desorption capacity at 40 °C being 5.84 mg/g and the maximum adsorption capacity at 60 °C being 5.67 mg/g. This study elucidates the regulatory mechanisms of temperature on adsorption/desorption behaviors in binder-formulated granulated adsorbents, providing critical insights for optimizing industrial aluminum-based lithium adsorbents in salt lake lithium extraction.

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粘结剂类型与铝基锂吸附剂结构性能关系的研究。

铝锂层状双氢氧化物吸附剂（Li/Al-LDH）具有吸附/解吸条件温和、稳定性好、成本低等优点，在工业上得到了广泛应用。然而，传统的粉状铝锂吸附剂流动性差，溶解速度相对较高。使用粘合剂的造粒策略被用来解决上述挑战。然而，对于粘结剂类型与吸附解吸效率的关系以及传质动力学和热力学机理的研究尚缺乏系统的研究。本文主要研究了吸附剂与聚氯乙烯（PVC）、聚偏氟乙烯（PVDF）和海藻酸钙（SA）三种粘结剂的构效关系。实验结果表明，不同粘结剂类型的吸附剂的吸附/解吸性能随温度的变化有显著差异。结果表明，随着温度的变化，PVDF-LDH和PVC-LDH的结构发生了变化，导致吸附和解吸性能下降。而SA-LDH能保持良好的结构稳定性和吸附解吸能力。此外，在300 ppm的LiCl溶液中，SA-LDH表现出较高的吸附和解吸能力，40℃时的最大解吸容量为5.84 mg/g， 60℃时的最大吸附容量为5.67 mg/g。本研究阐明了温度对粘结剂配方颗粒状吸附剂吸附/解吸行为的调控机制，为盐湖锂萃取中工业铝基锂吸附剂的优化提供了重要见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Chemistry Chemistry-General Chemistry

CiteScore

8.50

自引率

3.60%

发文量

1540

审稿时长

12 weeks

期刊介绍： Frontiers in Chemistry is a high visiblity and quality journal, publishing rigorously peer-reviewed research across the chemical sciences. Field Chief Editor Steve Suib at the University of Connecticut is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to academics, industry leaders and the public worldwide. Chemistry is a branch of science that is linked to all other main fields of research. The omnipresence of Chemistry is apparent in our everyday lives from the electronic devices that we all use to communicate, to foods we eat, to our health and well-being, to the different forms of energy that we use. While there are many subtopics and specialties of Chemistry, the fundamental link in all these areas is how atoms, ions, and molecules come together and come apart in what some have come to call the “dance of life”. All specialty sections of Frontiers in Chemistry are open-access with the goal of publishing outstanding research publications, review articles, commentaries, and ideas about various aspects of Chemistry. The past forms of publication often have specific subdisciplines, most commonly of analytical, inorganic, organic and physical chemistries, but these days those lines and boxes are quite blurry and the silos of those disciplines appear to be eroding. Chemistry is important to both fundamental and applied areas of research and manufacturing, and indeed the outlines of academic versus industrial research are also often artificial. Collaborative research across all specialty areas of Chemistry is highly encouraged and supported as we move forward. These are exciting times and the field of Chemistry is an important and significant contributor to our collective knowledge.