Innovative electrooxidation-adsorption technology for efficient iodine recovery from ultrahigh Cl/I ratio underground brine

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-04-06 DOI:10.1016/j.cej.2025.162356

Bin Yu, Leijin Wang, Zheng Li, Haixia Liang, Kaiyu Zhao, Yafei Guo, Tianlong Deng

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Abstract

Efficient and eco-friendly iodine recovery from underground brine with ultrahigh Cl/I ratios faces a great challenge for the traditional methods of iodine extraction from brine. In this work, we developed a novel electrooxidation-adsorption coupling technology for green and efficient iodine recovery from underground brine with an ultrahigh Cl/I ratio. Initially, the iodide ions (I^-) were selectively oxidized to triiodide ions (I₃^-) with an excellent electrooxidation rate of 80.46 % using an electrochemical apparatus. Subsequently, a novel porous Co-Vlm₆ adsorbent synthesized via the hydrothermal method achieved a remarkable adsorption capacity of 1466.01 mg·g⁻¹, with the adsorption equilibrium reached in just 3 min. Applying this electrooxidation adsorption coupling process to underground brine resulted in 81.93 % iodine recovery within 125 min. The outstanding electrooxidation-adsorption/desorption performance, cyclic stability, and cost-effectiveness make it a competitive candidate for the efficient recovery of iodine from underground brine and other liquid iodine resources.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.