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

IF 13.2 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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创新电氧化-吸附技术从地下超高Cl/I比盐水中高效回收碘

以超高Cl/I比从地下卤水中高效环保地回收碘，对传统的卤水提碘方法提出了巨大挑战。在这项工作中，我们开发了一种新的电氧化-吸附耦合技术，用于绿色高效地从地下盐水中回收超高Cl/I比的碘。首先，利用电化学装置选择性地将碘离子（I-）氧化为三碘离子（I3-），电氧化率为80.46 %。随后，通过水热法合成了一种新型多孔Co-Vlm6吸附剂，吸附量为1466.01 mg·g−1，仅在3 min内达到吸附平衡。将该电氧化吸附偶联工艺应用于地下卤水，在125 min内碘回收率达到81.93 %。优异的电氧化-吸附/解吸性能、循环稳定性和成本效益使其成为有效回收地下卤水和其他液态碘资源中碘的有竞争力的候选材料。

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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.