{"title":"Molybdenum recovery from acid leaching solution of copper smelting dust using solvent extraction","authors":"Jiawei Wu , Shan Qing , Yina Li , Mingyue Wang","doi":"10.1016/j.jwpe.2024.106345","DOIUrl":null,"url":null,"abstract":"<div><div>The massive accumulation of dust produced in the copper smelting process will cause waste of resources and environmental pollution. The selective separation and recovery of valuable metals in copper smelting dust is particularly important. In this study, we proposed a process for extracting molybdenum from acid leaching solution of copper smelting dust with extractant N235. The effects of different process parameters on the extraction and stripping of molybdenum were studied. Under the optimum conditions, the single-stage extraction and stripping efficiency were 94.35 % and 97.77 %, respectively. The extraction efficiency of molybdenum was 99.26 % after three stages of countercurrent extraction. The loaded organic phase was scrubbed with 15 g/L sulfuric acid solution to remove impurities. The stripping efficiency of molybdenum was 99.66 % by three-stage countercurrent stripping with 8 mol/L NH<sub>3</sub>∙H<sub>2</sub>O. Furthermore, the organic phase still maintains a high extraction efficiency after regeneration cycle. Based on the slope method and FT-IR analysis, it is speculated that the extraction complex of molybdenum is [(R<sub>3</sub>NH)<sub>2</sub>·[Mo<sub>2</sub>O<sub>5</sub>(SO<sub>4</sub>)<sub>2</sub>]]. The extraction of molybdenum from acid leaching solution by N235 is an entropy increase and spontaneous endothermic reaction. The recovery of molybdenum from secondary resources reduces the demand for virgin molybdenum ore and improves the efficiency of resource utilization. This study provides an efficient, economical, and environmentally friendly method for industrial recovery of molybdenum.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"68 ","pages":"Article 106345"},"PeriodicalIF":6.3000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714424015770","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The massive accumulation of dust produced in the copper smelting process will cause waste of resources and environmental pollution. The selective separation and recovery of valuable metals in copper smelting dust is particularly important. In this study, we proposed a process for extracting molybdenum from acid leaching solution of copper smelting dust with extractant N235. The effects of different process parameters on the extraction and stripping of molybdenum were studied. Under the optimum conditions, the single-stage extraction and stripping efficiency were 94.35 % and 97.77 %, respectively. The extraction efficiency of molybdenum was 99.26 % after three stages of countercurrent extraction. The loaded organic phase was scrubbed with 15 g/L sulfuric acid solution to remove impurities. The stripping efficiency of molybdenum was 99.66 % by three-stage countercurrent stripping with 8 mol/L NH3∙H2O. Furthermore, the organic phase still maintains a high extraction efficiency after regeneration cycle. Based on the slope method and FT-IR analysis, it is speculated that the extraction complex of molybdenum is [(R3NH)2·[Mo2O5(SO4)2]]. The extraction of molybdenum from acid leaching solution by N235 is an entropy increase and spontaneous endothermic reaction. The recovery of molybdenum from secondary resources reduces the demand for virgin molybdenum ore and improves the efficiency of resource utilization. This study provides an efficient, economical, and environmentally friendly method for industrial recovery of molybdenum.
期刊介绍：
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies
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