Hydrometallurgy最新文献

筛选
英文 中文
Specific chelating extraction of gallium(III) with H-N and H-CCl2 hydrogen atoms of dichlorinated secondary amide 二氯仲胺H-N和H-CCl2氢原子对镓(III)的螯合萃取
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-10-14 DOI: 10.1016/j.hydromet.2025.106596
Gehui Pang , Shintaro Morisada , Hidetaka Kawakita , Keisuke Ohto
{"title":"Specific chelating extraction of gallium(III) with H-N and H-CCl2 hydrogen atoms of dichlorinated secondary amide","authors":"Gehui Pang ,&nbsp;Shintaro Morisada ,&nbsp;Hidetaka Kawakita ,&nbsp;Keisuke Ohto","doi":"10.1016/j.hydromet.2025.106596","DOIUrl":"10.1016/j.hydromet.2025.106596","url":null,"abstract":"<div><div>Three secondary amides with different numbers of chlorine atom(s)—<em>N</em>-(2-ethylhexyl)monochloroacetamide (<strong>MCAA</strong>), <em>N</em>-(2-ethylhexyl)dichloroacetamide (<strong>DCAA</strong>), and <em>N</em>-(2-ethylhexyl)-2,2,2-trichloroacetamide (<strong>TCAA</strong>)—were synthesised for Ga(III) extraction. These three amides exhibited a preference for extracting Ga(III) compared to other metals at higher HCl concentrations, with the stoichiometries of Ga(III) extraction using the three reagents investigated <em>via</em> slope analysis. Spectroscopic studies were performed to elucidate the extraction mechanism of GaCl<sub>4</sub><sup>−</sup>. The hydronium ion extraction with (<strong>O</strong>)=C oxygen atoms of amides did not occur in lower HCl concentration media ([HCl] &lt; 8.46 mol dm<sup>−3</sup>), indicating that (<strong>H</strong>)-N hydrogen atom displayed a distinctive interaction with GaCl<sub>4</sub><sup>−</sup>. The <strong>DCAA</strong> exhibited the highest Ga(III) extraction efficiency among the three secondary amides. The proton nuclear magnetic resonance spectroscopic analysis and density functional theory calculations indicated that the <em>δ</em><sup>+</sup> value of the hydrogen atom in (<strong>H</strong>)-C-Cl<sub>2</sub> of <strong>DCAA</strong> was enhanced to assist GaCl<sub>4</sub><sup>−</sup> extraction with the (<strong>H</strong>)-N hydrogen atom. Stable intermolecular hydrogen bonding between (<strong>H</strong>)-N hydrogen and the partially negatively charged (<strong>O</strong>)=C oxygen atoms of <strong>MCAA</strong> inhibited GaCl<sub>4</sub><sup>−</sup> extraction. The complete stripping of Ga(III) from the Ga-loaded <strong>MCAA</strong> and <strong>TCAA</strong> was achieved using water, while chelation extraction with <strong>DCAA</strong> suppressed the efficiency of Ga(III) stripping with water.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106596"},"PeriodicalIF":4.8,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analyses of foam in Bayer precipitation tanks due to crystal growth modifiers 晶体生长调节剂对拜耳沉淀池中泡沫的影响分析
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-10-12 DOI: 10.1016/j.hydromet.2025.106595
Lei Xu, Wen-mi Chen, Shang Fan, Yan-jun Zhang
{"title":"Analyses of foam in Bayer precipitation tanks due to crystal growth modifiers","authors":"Lei Xu,&nbsp;Wen-mi Chen,&nbsp;Shang Fan,&nbsp;Yan-jun Zhang","doi":"10.1016/j.hydromet.2025.106595","DOIUrl":"10.1016/j.hydromet.2025.106595","url":null,"abstract":"<div><div>Foam generation in Bayer precipitation tanks is a major issue that affects the energy efficiency of precipitation in these tanks. However, the factors contributing to foam generation remain poorly understood. This work investigated the relationship between different crystal growth modifiers (CGMs) and foam generation during the precipitation process. Results indicate that in pure sodium aluminate solution, the addition of CGMs directly affects the foam volume. Furthermore, the foam generation potential (FGP) of CGMs varies significantly. CGM-A and CGM-B exhibited minimal FGPs at concentrations up to 300 mg/L in sodium aluminate solution containing aluminum tri-hydroxide (ATH) solids, resulting in practically no foam. In contrast, CGM-C presented stronger FGP at 100 mg/L, generating 8 mL of foam. The FGP of CGMs increased following high-temperature treatment at 260 °C. The FT-IR, GC–MS, and <sup>1</sup>H NMR analyses indicated that the large amounts of unsaturated fatty acids in CGM-C were a major cause of foaming. After high-temperature treatment, numerous alkane molecules were generated in the CGM-C, which served as foam stabilizers. This study provides valuable reference for further improvement of the alumina production capacity.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106595"},"PeriodicalIF":4.8,"publicationDate":"2025-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Precipitation of the ultrafine equiaxial near-spherical gibbsite with low oil absorption value by adding mixed seeds 加入混合种子可析出低吸油值的超细等轴近球形三水铝石
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-10-08 DOI: 10.1016/j.hydromet.2025.106586
Jinquan Wen, Guihua Liu, Tiangui Qi, Qiusheng Zhou, Zhihong Peng, Xiaobin Li, Yilin Wang, Leiting Shen
{"title":"Precipitation of the ultrafine equiaxial near-spherical gibbsite with low oil absorption value by adding mixed seeds","authors":"Jinquan Wen,&nbsp;Guihua Liu,&nbsp;Tiangui Qi,&nbsp;Qiusheng Zhou,&nbsp;Zhihong Peng,&nbsp;Xiaobin Li,&nbsp;Yilin Wang,&nbsp;Leiting Shen","doi":"10.1016/j.hydromet.2025.106586","DOIUrl":"10.1016/j.hydromet.2025.106586","url":null,"abstract":"<div><div>Ultrafine, near-spherical gibbsite with a low oil-absorption value hold significant potential for use in advanced flame-retardant fillers, polishing materials and dense alumina-bearing ceramics owing to its regular morphology, high dispersibility and good flowability. In this study, ultrafine equiaxial near-spherical gibbsite with a medium particle size (d<sub>50</sub>) of 359 nm and an oil-absorption values of 25.0 mL/100 g was precipitated by seeded precipitation from sodium aluminate solution. The mixed seeds, comprising bayerite and gibbsite, were prepared by the addition of NaHCO<sub>3</sub>, Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>, and H<sub>2</sub>O<sub>2</sub>, respectively. A high bayerite content in the NaHCO<sub>3</sub>-induced seeds, combined with significant supersaturation fluctuations, enabled a precipitation efficiency exceeding 51 % at an initial temperature of 80 °C for 35 h. Preferential growth of the (110), (100), and (001) planes occurred during the early stage, followed by the emergence of the (101) and (112) planes in the mid-to-late stage. High supersaturation from bayerite dissolution and adsorption of Al(OH)<sub>4</sub><sup>−</sup> ions promoted the development of (001), (110), (100), (101), and (112) planes, resulting in the formation of equiaxial near-spherical gibbsite. Furthermore, the low surface energy and high zeta potential of the well-crystallized gibbsite precipitated from NaHCO<sub>3</sub>-induced seeds contributed to its low oil absorption. These findings indicate that the presence of bayerite in seeds, elevated interfacial supersaturation, and high temperature collectively facilitate the formation of ultrafine, equiaxial, near-spherical gibbsite.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106586"},"PeriodicalIF":4.8,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The cyanidation of gold. III. Mechanistic details of the role of lead and sulfide ions 氰化金3。铅和硫化物离子作用的机理细节
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-10-08 DOI: 10.1016/j.hydromet.2025.106584
M. Nicol
{"title":"The cyanidation of gold. III. Mechanistic details of the role of lead and sulfide ions","authors":"M. Nicol","doi":"10.1016/j.hydromet.2025.106584","DOIUrl":"10.1016/j.hydromet.2025.106584","url":null,"abstract":"<div><div>The role of lead ions in the cyanidation of gold has been extensively studied in this investigation. In addition to a speciation analysis using accepted thermodynamic data, the equilibrium potential for the deposition of lead under cyanidation conditions has been estimated. This has been used in conjunction with other electrochemical measurements to confirm that bulk lead metal is not deposited on a gold surface during cyanidation. The underpotential deposition of lead has been confirmed and it has been shown that an incomplete layer of lead is responsible for the increased rates in the presence of lead. The detrimental effect of high lead concentrations appears to be the result of the formation of a complete lead layer on the gold surface.</div><div>A less extensive study of the effect of sulfide ions on the rate of cyanidation has confirmed that low (micro-molar) concentrations of sulfide ions enhance the dissolution of gold in cyanide solutions but inhibit the rate of dissolution at high concentrations. The detrimental effect is associated with the anodic oxidation of gold and the formation of a passivating layer of Au<sub>2</sub>S is possibly responsible. There does not appear to be a significant effect of sulfide on the kinetics of the cathodic reduction of oxygen. A gold alloy containing 10 % silver is less susceptible to the inhibitory effect of sulfide ions.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106584"},"PeriodicalIF":4.8,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145271037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Field-effect separation of rare earth elements in gelatin-supported media 稀土元素在明胶介质中的场效应分离
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-10-04 DOI: 10.1016/j.hydromet.2025.106585
Benjamin Schroeder , Michael Free , Prashant K. Sarswat
{"title":"Field-effect separation of rare earth elements in gelatin-supported media","authors":"Benjamin Schroeder ,&nbsp;Michael Free ,&nbsp;Prashant K. Sarswat","doi":"10.1016/j.hydromet.2025.106585","DOIUrl":"10.1016/j.hydromet.2025.106585","url":null,"abstract":"<div><div>The unique optical, electronic, and magnetic properties of the Rare Earth Elements (La-Lu + Sc, Y) have led to a significant increase in their demand by a wide variety of industries. This, coupled with the significant difficulty associated with their extraction, separation, and purification, has resulted in a strong interest in replacing the traditional solvent extraction with a new approach. In response, a new technology called “Field-Effect Separation” (FES) has been developed, which utilizes differences in the magnetic susceptibilities of ions in a strong field to separate them from one another. While it has been demonstrated that this approach can work, it is necessary to more fully understand and optimize the separation of elements. The approach taken to study this was to suspend a solution of REE ions in a firm gelatin, separating them using a strong magnet, freezing the sample to preserve separation, and taking fine slices to analyze the concentration of ions at different spatial positions relative to the magnet as well as different times relative to the beginning of the magnetic field exposure. The results show a significant concentration effect for the magnetically susceptible REEs near the magnet's surface, while the non-susceptible ions seem relatively unconcentrated by the magnetic field. Additionally, among the susceptible REEs, at certain, short separation timescales, a significant stratification of REEs was observed. This suggests that the REEs can be separated from one another using FES assuming a correct time and length scale can be selected for the system.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106585"},"PeriodicalIF":4.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Understanding limitations to monazite concentrate dissolution in oxalic acid 了解单氮石精矿在草酸中溶解的局限性
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-10-03 DOI: 10.1016/j.hydromet.2025.106582
Mark Stephen Henderson, Laurence Gerald Dyer, Bogale Tadesse
{"title":"Understanding limitations to monazite concentrate dissolution in oxalic acid","authors":"Mark Stephen Henderson,&nbsp;Laurence Gerald Dyer,&nbsp;Bogale Tadesse","doi":"10.1016/j.hydromet.2025.106582","DOIUrl":"10.1016/j.hydromet.2025.106582","url":null,"abstract":"<div><div>Prior works with organic acids have shown dissolution of rare earth element (REE) bearing phosphate minerals with oxalic acid, solubilising phosphate and depositing rare earth oxalates that can be solubilised in a second stage. Previously published information shows local maxima in recovery and hypothesised reaction control mechanisms. The current article investigates reaction limitations (mineralogical and thermodynamic) in greater depth to inform process development.</div><div>Monazite concentrate was treated with oxalic acid at temperatures in a range from 30 °C to 95 °C. Various factors were found to influence the extent of phosphorus dissolution. Previous studies achieved &lt;32 % phosphate dissolution at 65 °C, this work has demonstrated the ability to achieve in excess of 65 % conversion using a multi-stage, cross flow leach at 45 °C with a large reduction in simultaneous iron dissolution.</div><div>Approximately 65 % of the phosphorus was solubilised using a multi-stage, cross-flow leach system. Two different monazite compositional signatures, indicative of variations in REE and phosphorus contents, were identified displaying significantly different reactivity. One form readily dissolved in oxalic acid, the other experienced little or no reaction.</div><div>Calculated oxalate losses to the reprecipitated salts and complexation with solution components was used to estimate availability of free oxalate, this was supported by the concentration of elements with low oxalate solubility (Ca and Ce). It was demonstrated that free oxalate is a limiting factor in dissolution. It is therefore evident that under different conditions, there are both mineralogical and solution thermodynamic drivers for reaction rate and extent achievable.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106582"},"PeriodicalIF":4.8,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145322433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cationic polyacrylamide (CPAM) assisted leaching of rare earth ore containing clay minerals by inhibiting swelling and promoting permeation of ammonium sulfate solution 阳离子聚丙烯酰胺(CPAM)通过抑制溶胀和促进硫酸铵溶液的渗透来辅助含粘土矿物稀土矿的浸出
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-10-03 DOI: 10.1016/j.hydromet.2025.106583
Meiling Jiang , Huifang Yang , Wenqian Cui , Yunbo Yang , Zhenyue Zhang , Zhengyan He , Zhigao Xu , Ming Wu , Jun Zhao , Ruan Chi
{"title":"Cationic polyacrylamide (CPAM) assisted leaching of rare earth ore containing clay minerals by inhibiting swelling and promoting permeation of ammonium sulfate solution","authors":"Meiling Jiang ,&nbsp;Huifang Yang ,&nbsp;Wenqian Cui ,&nbsp;Yunbo Yang ,&nbsp;Zhenyue Zhang ,&nbsp;Zhengyan He ,&nbsp;Zhigao Xu ,&nbsp;Ming Wu ,&nbsp;Jun Zhao ,&nbsp;Ruan Chi","doi":"10.1016/j.hydromet.2025.106583","DOIUrl":"10.1016/j.hydromet.2025.106583","url":null,"abstract":"<div><div>In-situ leaching of clay-based weathered crust elution-deposited rare earth ore (WCE-DREO) is prone to landslides resulting from the swelling of clay minerals, which compromises both ecological safety, economics and efficiency of mining. This study used the cationic polyacrylamide (CPAM), mixed with 2.0 wt% (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> to form a composite leaching agent to address this issue, which serves two purposes: (i) it acts as an inhibitor of clay swelling, (ii) it promotes the permeation of the leaching agent. Linear swelling tests and column leaching experiments were conducted to evaluate the effect of CPAM on swelling inhibition and permeation promotion in rare earth ore leaching. The underlying mechanisms were tested and analyzed through a series of advanced characterization methods. The findings demonstrate that the addition of CPAM significantly enhances the permeation of the leaching agent. Furthermore, the composite leaching agent of (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> and CPAM inhibits the swelling at higher CPAM concentrations. At a CPAM concentration of 3 × 10<sup>−4</sup> wt%, the seepage time of the leaching agent is minimized—effectively reduced by 46 %, compared to using 2.0 wt% (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> alone. The CPAM structure contains amine groups and positively charged quaternary ammonium groups which enable the adsorption of CPAM onto the clay mineral interlayer and surface through hydrogen bonding and electrostatic interactions. This adsorption affects in four ways: (i) hinders the entry of water molecules into the mineral interlayers, (ii) reduces electrostatic repulsion, (iii) compresses the diffuse double layer, and (iv) promotes the aggregation of fine particles into larger clusters. These effects further inhibit the swelling of clay minerals and promote the permeation of the leaching agent. At the same time, the long-chain structure of CPAM helps to entangle fine clay mineral particles into larger clusters. This prevents clogging of the permeation channel due to the movement of fine particles along with the (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> solution, thereby increasing the seepage rate. Additionally, CPAM can enter the clay mineral layers to discharge internal water and further inhibit swelling. This study provides theoretical insights and technical support for the safe and highly efficient mining of WCE-DREO.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106583"},"PeriodicalIF":4.8,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The cyanidation of gold. II. The cathodic reduction of oxygen 氰化金2。氧的阴极还原
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-09-30 DOI: 10.1016/j.hydromet.2025.106580
M. Nicol
{"title":"The cyanidation of gold. II. The cathodic reduction of oxygen","authors":"M. Nicol","doi":"10.1016/j.hydromet.2025.106580","DOIUrl":"10.1016/j.hydromet.2025.106580","url":null,"abstract":"<div><div>An extensive study has been undertaken of the reduction of oxygen on various gold electrodes under conditions appropriate to the cyanide leaching of gold. Voltammetric studies with various gold electrodes and ring-disk electrode measurements with pure gold have demonstrated that the 2-step reduction involving peroxide as an intermediate is complex with variable extents of production of peroxide and reduction to water depending on the electrode material and solution purity. There is thus no simple stoichiometry for the reduction of oxygen although the use of a 2-electron reduction is probably the best approximation under plant conditions. This is contrary to the often accepted 4-electron process.</div><div>The nature of the gold surface is important with lower reactivity of gold‑silver alloy and plant electrodes relative to pure gold. The sensitivity of oxygen to the presence of underpotentially deposited lead has been demonstrated in solutions contaminated with lead ions. Lead ions have a significant catalytic effect on the kinetics of oxygen reduction that can be attributed to the known effect of underpotentially deposited lead on the reduction of oxygen on gold electrodes in acidic and highly alkaline solutions. Thus, both the anodic dissolution of gold and the cathodic reduction of oxygen are catalysed in the presence of low concentrations of lead ions.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"238 ","pages":"Article 106580"},"PeriodicalIF":4.8,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selective leaching of arsenic from zinc oxide dust in NaOH-(NH2)2CS solution NaOH-(NH2)2CS溶液中氧化锌粉尘中砷的选择性浸出
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-09-29 DOI: 10.1016/j.hydromet.2025.106577
Faxin Xiao , Xinyu Cao , Qingwen Ma , Cuixia Yang , Yaru Zhao , Ziqi He , Xuwei Luo , Junqiang Chen , Shuchen Sun , Ganfeng Tu
{"title":"Selective leaching of arsenic from zinc oxide dust in NaOH-(NH2)2CS solution","authors":"Faxin Xiao ,&nbsp;Xinyu Cao ,&nbsp;Qingwen Ma ,&nbsp;Cuixia Yang ,&nbsp;Yaru Zhao ,&nbsp;Ziqi He ,&nbsp;Xuwei Luo ,&nbsp;Junqiang Chen ,&nbsp;Shuchen Sun ,&nbsp;Ganfeng Tu","doi":"10.1016/j.hydromet.2025.106577","DOIUrl":"10.1016/j.hydromet.2025.106577","url":null,"abstract":"<div><div>The selective removal of arsenic from zinc smelting dust is a notable measure toward resource recovery and environmental protection. In this study, a thiourea-assisted alkaline leaching method was employed to selectively extract arsenic from Zn smelting dust. The thermodynamics of arsenic dissolution were investigated first. The effects of NaOH concentration, thiourea concentration, leaching temperature, leaching time, and liquid–solid ratio on arsenic and zinc extraction during alkaline leaching were investigated. The results demonstrated that the addition of thiourea effectively enhanced arsenic extraction from 58.1 % to 77.1 %, while suppressing Zn leaching from 18.4 % to 2.6 %. Under optimal conditions, As, Zn, Fe, Pb, In, and Ag exhibited leaching efficiencies of 77.1 %, 2.6 %, 4.5 %, 2.1 %, 1.3 %, and 3.2 %, respectively, confirming selective arsenic leaching over other elements. Combined XRD, SEM, and XPS characterizations revealed that thiourea facilitated the dissolution of insoluble arsenate minerals and promoted the formation of ZnS and PbS precipitates by releasing S<sup>2−</sup> into the solution. This process effectively reduced the loss of valuable metals such as Zn and Pb. This method can be used to selectively remove arsenic from As-containing oxidized dust.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"238 ","pages":"Article 106577"},"PeriodicalIF":4.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Separation of gallium from acid leachates of zinc smelting slag by tartaric acid coordinated complexation and anion-exchange 酒石酸配位-阴离子交换法分离锌渣酸性浸出液中镓
IF 4.8 2区 材料科学
Hydrometallurgy Pub Date : 2025-09-29 DOI: 10.1016/j.hydromet.2025.106581
Mingwei Qi , Minyu Zhu , Hao Chen , Yun Liu , Zhiqiang Lin , Zezuo Jiang , Jing Wu , Chunlin He
{"title":"Separation of gallium from acid leachates of zinc smelting slag by tartaric acid coordinated complexation and anion-exchange","authors":"Mingwei Qi ,&nbsp;Minyu Zhu ,&nbsp;Hao Chen ,&nbsp;Yun Liu ,&nbsp;Zhiqiang Lin ,&nbsp;Zezuo Jiang ,&nbsp;Jing Wu ,&nbsp;Chunlin He","doi":"10.1016/j.hydromet.2025.106581","DOIUrl":"10.1016/j.hydromet.2025.106581","url":null,"abstract":"<div><div>The rapid advancement of strategic technologies, including semiconductor manufacturing, 5G infrastructure, renewable energy systems, and aerospace engineering, has driven a surge in global demand for gallium (Ga). To address this need, secondary resources such as zinc smelting slag have emerged as a critical source for gallium recovery. This study proposes a novel strategy for gallium recovery by leveraging the ligand complexation capability of tartaric acid to convert Ga(OH)<sub>3</sub> into negatively charged complexes([GaO<sub>2</sub>(OH)C<sub>4</sub>H<sub>2</sub>O<sub>4</sub>]<sub>2</sub><sup>4−</sup>), followed by selective adsorption using a polystyrene-based anion-exchange resin (D201 × 7). The results demonstrated that the maximum adsorption capacity was 138 mg/g at pH 4, <em>T</em> = 328 K, <em>t</em> = 45 min and 1:1 M ratio of tartaric acid with Ga. The adsorption process conformed to the pseudo-second-order kinetic and Langmuir isotherm models. The primary mechanism for the adsorption of Ga(III) involved complexation with tartaric acid to form an anionic species and undergo ion exchange via the Cl<sup>−</sup> functional groups on the D201 × 7 resin. The column experiment demonstrated highly selective adsorption efficiency of Ga(III) in the presence of various interfering metal ions. This study provides a feasible alternative for the separation of Ga(III) from industrial zinc slag processing in sulfuric acid systems and has broad application prospects.</div></div>","PeriodicalId":13193,"journal":{"name":"Hydrometallurgy","volume":"239 ","pages":"Article 106581"},"PeriodicalIF":4.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信