Selective and efficient adsorption of H3BO3 from Salt Lake brine solution by ZIF-67-derived hollow cobalt sulfide

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination Pub Date : 2025-05-15 DOI:10.1016/j.desal.2025.119019

Yifan Shao , Chao Hu , Ruirui Liu , Bingxin Liu , Yongquan Zhou , Jianming Pan

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引用次数: 0

Abstract

The design of adsorbents with high recognition activity, high site density and high mass transfer efficiency is the significant to the removal of specific non-metallic ions from Salt Lake brines. Here we report the fabrication of ZIF-67-derived hollow Co₃S₄ nanoadsorbent for the adsorption and separation of boron (B) in complex water from concentrated salt solutions. The adsorption experiments displayed that the B adsorption capacity of the hollow Co₃S₄ material exhibited substantial B adsorption capacity, reaching 283.3 mg·g⁻¹, which represents an impressive 7.3-fold improvement over ZIF-67. On these grounds, a series of kinetic and thermodynamic studies were conducted, and the results revealed that the adsorption process is more consistent with the spontaneous exothermic reaction of the Langmuir adsorption isothermal model (R² = 0.999). The results of the charge density and density of states depicted that Co atoms strongly interact before and after adsorption, and that Co atoms are tend to react spontaneously with H₃BO₃, which serves as the primary adsorption site. The interaction including electrostatic and hydrogen bonds jointly realizes in B adsorption performance with high selectivity and excellent cycle stability. This study highlighted the high adsorption performance of the hollow Co₃S₄ for boron in real water of the Salt Lake brine and provided a new idea for the design of other ZIFs derived hollow nanoadsorbent for practical applications.

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zif -67衍生中空硫化钴对盐湖卤水中H3BO3的选择性高效吸附

设计具有高识别活性、高位点密度和高传质效率的吸附剂对去除盐湖卤水中特定非金属离子具有重要意义。本文报道了由zif -67衍生的空心Co3S4纳米吸附剂的制备，用于从浓盐溶液中吸附和分离复合水中的硼。吸附实验表明，空心Co3S4材料对B的吸附量较大，达到283.3 mg·g−1，比ZIF-67提高了7.3倍。基于此，进行了一系列动力学和热力学研究，结果表明吸附过程更符合Langmuir吸附等温模型的自发放热反应（R2 = 0.999）。电荷密度和态密度的结果表明，Co原子在吸附前后相互作用强烈，并且Co原子倾向于与H3BO3自发反应，H3BO3是主要的吸附位点。静电和氢键的相互作用共同实现了高选择性和良好循环稳定性的B吸附性能。本研究突出了空心Co3S4对盐湖卤水实际水中硼的高吸附性能，为其他zif衍生的空心纳米吸附剂的设计提供了新的思路。

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

Desalination 工程技术-工程：化工

CiteScore

14.60

自引率

20.20%

发文量

619

审稿时长

41 days

期刊介绍： Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.