Minerals最新文献_第3页

Novel Depressant Based on Hybridization Theory for the Separation of Galena and Realgar: Experimental Study and Adsorption Mechanism 基于杂交理论的方铅矿与雄黄分离抑制剂的实验研究及吸附机理

4区地球科学

Minerals Pub Date : 2025-02-20 DOI: 10.3390/min15030200

Zhiqiang Zhao, Zehui Gao, Chuanyao Sun, Y.F. Zhang, Chongjun Liu, Tong Lu, Yangge Zhu, Guiye Wu, Ruidong Li, Jun Hu

{"title":"Novel Depressant Based on Hybridization Theory for the Separation of Galena and Realgar: Experimental Study and Adsorption Mechanism","authors":"Zhiqiang Zhao, Zehui Gao, Chuanyao Sun, Y.F. Zhang, Chongjun Liu, Tong Lu, Yangge Zhu, Guiye Wu, Ruidong Li, Jun Hu","doi":"10.3390/min15030200","DOIUrl":"https://doi.org/10.3390/min15030200","url":null,"abstract":"In lead concentrate cleaning, achieving efficient separation of galena from realgar—both significant naturally floatable minerals-relies critically on selective galena depression. This study introduces dimercaptosuccinic acid (DMSA) as a novel organic depressant by leveraging its distinct carbon-sulfur hybridization compared to diethyldithiocarbamate (DDTC). Quantum chemical analyses reveal that the sp3-hybridized sulfur in DMSA exhibits enhanced p-orbital reactivity, enabling stronger chemical adsorption on galena via Pb-S bonding. At pH 6.5, DMSA (4 mg/L) achieved optimal separation with a separation index of 11.88, outperforming DDTC (10 mg/L). FTIR/XPS confirmed DMSA’s chemisorption on galena, while theoretical calculations highlighted its superior Pb-S bond strength compared to DDTC. Notably, DMSA’s lower dosage and reduced environmental impact position it as a sustainable alternative to inorganic depressants. This work provides fundamental insights into sulfur orbital-driven adsorption mechanisms, advancing the rational design of eco-friendly flotation reagents.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 3","pages":"200-200"},"PeriodicalIF":0.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/3/200/pdf?version=1740048014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147903830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The Effect of Fluid Acidity on GeO2 Solubility and Complexation in Aqueous Solutions and Its Implications on Ge Mineralization 流体酸度对水溶液中GeO2溶解度和络合的影响及其对Ge矿化的影响

4区地球科学

Minerals Pub Date : 2025-02-13 DOI: 10.3390/min15020173

Zhiwei Xu, Haotian Liu, Yan Zhang, Runsheng Han, Zonghui Li, Xing Ding

{"title":"The Effect of Fluid Acidity on GeO2 Solubility and Complexation in Aqueous Solutions and Its Implications on Ge Mineralization","authors":"Zhiwei Xu, Haotian Liu, Yan Zhang, Runsheng Han, Zonghui Li, Xing Ding","doi":"10.3390/min15020173","DOIUrl":"https://doi.org/10.3390/min15020173","url":null,"abstract":"Germanium (Ge) has been recognized as a critical strategic metal due to its high-technology implications. It is predominantly found in sphalerite within the Pb-Zn deposits, whose genesis is closely related to chloride-bearing hydrothermal activities. However, the dissolution and complexation of Ge in chloride-bearing fluids have not yet been well understood. To address this issue, this study investigates the dissolution behavior of Ge and corresponding species in HCl and NaCl aqueous solutions at 150 °C using the solubility method. The results show that the solubility of Ge in HCl solutions reaches 300 ppm and decreases with increasing HCl concentration. In contrast, the solubility of Ge in NaCl solutions is up to 1500 ppm and exhibits no significant dependence on NaCl concentration. The new findings demonstrate that the solubility of Ge in chloride-bearing solutions is primarily controlled by the solution’s pH. As the pH increases, the concentration of Ge dissolved in solutions rises substantially, suggesting that alkaline fluid environments facilitate Ge dissolution and transport. Further analysis of the experimental data indicates that the dominant species of Ge is Ge(OH)40 in acidic chloride-bearing solutions and Ge(OH)5− in neutral-basic chloride-bearing solutions, in which the species Ge(OH)5− promotes higher Ge solubility compared to Ge(OH)40. On account of high solubility in both HCl and NaCl solutions, it is proposed that Ge mineralization is not controlled by the co-precipitation process with Pb and Zn but by subsequent solid–liquid reaction between sphalerite and fluids. These experimental data and computational results not only provide new insights into the dissolution, transport, and precipitation processes of Ge in Earth’s material cycling but also offer novel perspectives for the understanding of Ge mineralization and industrial extraction and recovery of Ge.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 2","pages":"173-173"},"PeriodicalIF":0.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/2/173/pdf?version=1739448156","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Surface Pretreatment with Luteolin to Achieve the Effective Flotation Separation of Sphalerite from Pyrite in a CuSO4-Xanthate System 木犀草素表面预处理在cuso4 -黄药体系中实现闪锌矿与黄铁矿的有效浮选分离

4区地球科学

Minerals Pub Date : 2025-02-10 DOI: 10.3390/min15020162

J. Chen, Lv Zhao, Haiyang He, Jinpeng Cai, Liuyang Dong, Dianwen Liu

{"title":"Surface Pretreatment with Luteolin to Achieve the Effective Flotation Separation of Sphalerite from Pyrite in a CuSO4-Xanthate System","authors":"J. Chen, Lv Zhao, Haiyang He, Jinpeng Cai, Liuyang Dong, Dianwen Liu","doi":"10.3390/min15020162","DOIUrl":"https://doi.org/10.3390/min15020162","url":null,"abstract":"The flotation separation of sphalerite (ZnS) and pyrite (FeS2) in a copper sulfate (CuSO4)–butyl xanthate (BX) system is challenging because the indiscriminate activation of Cu2+ gives them similar floatability. To this end, the suitability of a novel depressant, luteolin (LUT), on the flotation separation of ZnS from FeS2 in this system was studied. Micro-flotation tests and contact angle measurement results showed that ZnS could be selectively separated from FeS2 using LUT as a depressant. At pH 7.0 ± 0.1, a flotation concentrate with a recovery of 93.90% ZnS and 2.84% FeS2 was obtained after adding LUT in artificial mixed minerals tests. Adsorption differences and characteristics results showed that the affinity of LUT to FeS2 was considerably higher than that of ZnS, which effectively hindered the subsequent adsorption of xanthate on FeS2 but had a relatively weak effect on ZnS. Thus, a large floatability difference between ZnS and FeS2 was achieved. Further analyses revealed that the adsorption behavior of LUT on FeS2 occurred mainly through the interaction between 4–5 sites and Fe(II) at the solid/liquid interface. These findings shed light for the first time on the suitability of LUT for the successful flotation separation of ZnS from FeS2, which has important guiding significance for the development of a lime-free depressant of FeS2.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 2","pages":"162-162"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/2/162/pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147921817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

The Separation of Y and Er Based on the Synergistic Effect of [N1444][P507] and TRPO 基于[N1444][P507]和TRPO协同效应的Y和Er分离

4区地球科学

Minerals Pub Date : 2025-02-06 DOI: 10.3390/min15020153

Kejia Ning, Jingzheng Wang, Li Zhang, Mengting Hong, Biao Fu, Jiushuai Deng, Xiahui Gui, Yaowen Xing, Guixia Fan, Hongxiang Xu

{"title":"The Separation of Y and Er Based on the Synergistic Effect of [N1444][P507] and TRPO","authors":"Kejia Ning, Jingzheng Wang, Li Zhang, Mengting Hong, Biao Fu, Jiushuai Deng, Xiahui Gui, Yaowen Xing, Guixia Fan, Hongxiang Xu","doi":"10.3390/min15020153","DOIUrl":"https://doi.org/10.3390/min15020153","url":null,"abstract":"This systematic study was conducted on the separation of yttrium (Y) and erbium (Er) from a chloride medium using a mixed extractant system composed of [N1444][P507] and TRPO (trialkylphosphine oxide) in kerosene. This investigation focused on the effects of various extractants, extraction systems, the initial acidity of the aqueous phase, and the phase contact time on the extraction efficiencies of Y and Er. This study showed that using the combination of [N1444][P507] and TRPO notably increased the extraction performance and enhanced the separation factor between Y and Er, outperforming the individual use of P507 or [N1444][P507] under identical conditions. The extraction efficiencies for Y and Er reached 88.4% and 93.3%, respectively, with a separation factor (Er/Y) of 1.84, highlighting the system’s effectiveness in selectively isolating rare earth elements. Optimal stripping conditions were obtained using 0.1 mol/L of HCl, resulting in a successful recovery of 93.1% of Y3+ and 78.9% of Er3+ from the organic phase. The extraction mechanism involved both ion exchange and ion association. The enthalpy changes (ΔH) associated with the extraction of Y3+ (−2.5 kJ·mol−1) and Er3+ (4.6 KJ·mol−1) demonstrate that the extraction processes are exothermic, reflecting the thermodynamic differences between the two ions.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 2","pages":"153-153"},"PeriodicalIF":0.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/2/153/pdf?version=1738831729","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147886950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Selective Flotation Separation of Chalcopyrite from Copper-Activated Pyrite and Pyrrhotite Using Oxidized Starch as Depressant 以氧化淀粉为抑制剂选择性浮选分离黄铜矿与铜活化黄铁矿和磁黄铁矿

4区地球科学

Minerals Pub Date : 2025-01-29 DOI: 10.3390/min15020133

Guoliang Bai, Congxin Huang, Yonghao Li, Ming Zhang

{"title":"Selective Flotation Separation of Chalcopyrite from Copper-Activated Pyrite and Pyrrhotite Using Oxidized Starch as Depressant","authors":"Guoliang Bai, Congxin Huang, Yonghao Li, Ming Zhang","doi":"10.3390/min15020133","DOIUrl":"https://doi.org/10.3390/min15020133","url":null,"abstract":"The disadvantages of using lime to depress the flotation of copper-activated pyrite and pyrrhotite are well known. In this study, oxidized starch, prepared by the ozone nanobubble technology, was employed as an eco-friendly depressant for copper-activated pyrite and pyrrhotite in the flotation of chalcopyrite. Single mineral flotation showed that oxidized starch inhibited the flotation of copper-activated pyrite and pyrrhotite at pH 5.5 while having no significant impact on chalcopyrite flotation. Zeta potential and adsorption measurements, together with XPS analysis and EDTA extraction, were conducted to understand the mechanism underpinning the selective depression behavior of oxidized starch. It was found that oxidized starch had a stronger affinity for copper-activated pyrite and pyrrhotite than for chalcopyrite. The depression of pyrite and pyrrhotite by oxidized starch was due to the combined effect of the formation of hydrophilic Cu-starch complex and the oxidation of Cu(I) on their surfaces. Further, oxidized starch was examined in the flotation of an actual bulk sulfur concentrate where a comparable depression performance to that of lime was shown. This investigation may contribute to the greening of the chalcopyrite flotation process by demonstrating the promising potential of oxidized starch for copper-activated pyrite and pyrrhotite depression.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 2","pages":"133-133"},"PeriodicalIF":0.0,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Effect of CO2 Concentration on the Microbial Activity of Orenia metallireducens (Strain Z6) in Surface Inert Materials CO2浓度对表面惰性材料中金属还原oreia （Z6）微生物活性的影响

4区地球科学

Minerals Pub Date : 2025-01-24 DOI: 10.3390/min15020112

Shuyi Li, Wentao Song, Juan Liu, Maxim I. Boyanov, Edward J. O’Loughlin, Kenneth Kemner, Robert A. Sanford, Hongbo Shao, Feng Qi, Yu He, Yiran Dong, Liang Shi

{"title":"Effect of CO2 Concentration on the Microbial Activity of Orenia metallireducens (Strain Z6) in Surface Inert Materials","authors":"Shuyi Li, Wentao Song, Juan Liu, Maxim I. Boyanov, Edward J. O’Loughlin, Kenneth Kemner, Robert A. Sanford, Hongbo Shao, Feng Qi, Yu He, Yiran Dong, Liang Shi","doi":"10.3390/min15020112","DOIUrl":"https://doi.org/10.3390/min15020112","url":null,"abstract":"Carbon dioxide (CO2) sequestration has garnered widespread attention as a key strategy for mitigating CO2 emissions and combating the greenhouse effect. However, the mechanisms underlying the interactions between CO2, widespread siliceous minerals and biological processes remain unclear. The present study explored the potential impacts of different CO2 concentrations on microbial activity, environmental conditions and their feedback on the fate of CO2. A total of 20 experimental conditions was created, with the variables including different natural and synthetic siliceous minerals (e.g., quartz sand and a type of commercial glass beads), the presence or absence of the iron-reducing microorganism Orenia metallireducens (strain Z6) and varying CO2 concentrations (0%, 20%, 50%, 100%) in the presence of ferrihydrite and pyruvate. Geochemical, microbial and mineralogical analyses revealed that elevated CO2 concentrations significantly inhibited microbial Fe(III) reduction and pyruvate metabolism. Interestingly, compared to cultures without mineral amendments or those with glass beads alone, the addition of quartz sand enabled strain Z6 to better withstand the environmental stress caused by elevated CO2, promoting pyruvate fermentation and iron reduction. In addition to an increased pH, the formation of siderite, hematite and vivianite was also observed in the bioactive systems. Although both glass beads and quartz sand were primarily composed of silica, differences in the mineral structure, elemental composition and acid neutralization capacity rendered quartz sand more chemically active and unexpectedly led to greater CO2 sequestration.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 2","pages":"112-112"},"PeriodicalIF":0.0,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/2/112/pdf?version=1737709763","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gemstones from the Medicean Collection of the Natural History Museum of Florence (Italy): New Insights from Micro-Raman and PIXE-PIGE Analyses 意大利佛罗伦萨自然历史博物馆收藏的美第奇宝石：来自微拉曼和pixie - pige分析的新见解

4区地球科学

Minerals Pub Date : 2025-01-21 DOI: 10.3390/min15020096

Lucilla Fabrizi, M. Chiari, Vanni Moggi Cecchi, Rosarosa Manca, Marco Benvenuti

{"title":"Gemstones from the Medicean Collection of the Natural History Museum of Florence (Italy): New Insights from Micro-Raman and PIXE-PIGE Analyses","authors":"Lucilla Fabrizi, M. Chiari, Vanni Moggi Cecchi, Rosarosa Manca, Marco Benvenuti","doi":"10.3390/min15020096","DOIUrl":"https://doi.org/10.3390/min15020096","url":null,"abstract":"The initial nucleus of gemstones at the Natural History Museum of the University of Florence (Italy) is linked to the significant collection of the Medici family, who began it as early as the 15th century. The present research aims to study this collection in order to (1) comprehensively review the archival and catalogue information available; (2) identify the mineralogical species correctly; and (3) gather information on the potential provenance of the gem deposits. To address these objectives, fifty gems were investigated using entirely non-invasive methods, ensuring the preservation of the collection’s precious and historical value. All specimens underwent autoptic observation and micro-Raman analysis, while a selection was further examined using PIXE-PIGE to characterise their chemical composition, including trace elements. The gems were attributed to seven mineral species: emerald, topaz, grossular, cordierite, quartz, orthoclase, and tourmaline. One gem was identified as a fake, made of glass and likely produced in the 17th century. Twenty-nine of the historical attributions in the catalogue were found to be incorrect and were subsequently revised. In some cases, the trace elements and mineral inclusions identified in the gems enabled the determination of potential provenance deposits, which were then compared with the available archival information.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 2","pages":"96-96"},"PeriodicalIF":0.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/2/96/pdf?version=1737450896","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147890371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effects of Sodium Silicate on Flotation Separation of Sphalerite and Dolomite and Its Mechanism 水玻璃对闪锌矿和白云石浮选分离的影响及其机理

4区地球科学

Minerals Pub Date : 2025-01-16 DOI: 10.3390/min15010082

Longqian Ni, Jin-fang Lv, Lingyu Kong, Longwei Qin

{"title":"Effects of Sodium Silicate on Flotation Separation of Sphalerite and Dolomite and Its Mechanism","authors":"Longqian Ni, Jin-fang Lv, Lingyu Kong, Longwei Qin","doi":"10.3390/min15010082","DOIUrl":"https://doi.org/10.3390/min15010082","url":null,"abstract":"Sphalerite often co-exists with dolomite, a carbonate mineral containing calcium and magnesium. In the flotation process of sphalerite, dolomite entering into the concentrate will have a considerable negative impact on the subsequent smelting. Therefore, the effects of sodium silicate on the flotation separation of sphalerite and dolomite and its mechanism were investigated in this study. It was found that alkaline conditions and the addition of sodium silicate were conducive to the flotation separation of sphalerite and dolomite. Under alkaline conditions, sodium silicate improved the hydrophobicity of sphalerite and the slurry turbidity. The yield stress and apparent viscosity were significantly reduced when dolomite was present in slurry. In addition, the surface electrical properties of dolomite shifted from positive to negative with an increase in the dosage of sodium silicate at pH 11, leading to electrostatic repulsion between sphalerite and dolomite. EDLVO results indicated that the total interaction energy between dolomite and sphalerite particles was repulsive when sodium silicate was present. This study provided a theoretical basis for the flotation separation of sphalerite and dolomite.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 1","pages":"82-82"},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/1/82/pdf?version=1737037344","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147897399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

New Insights for Improving Low-Rank Coal Flotation Performance via Tetrahydrofurfuryl Ester Collectors 利用四氢糠酯捕收剂改善低阶煤浮选性能的新见解

4区地球科学

Minerals Pub Date : 2025-01-15 DOI: 10.3390/min15010078

Xin Wang, Rui Ding, Xinyu Cui, Yonghong Qin, Cheng Gan, George Blankson Abaka-Wood, Enze Li

{"title":"New Insights for Improving Low-Rank Coal Flotation Performance via Tetrahydrofurfuryl Ester Collectors","authors":"Xin Wang, Rui Ding, Xinyu Cui, Yonghong Qin, Cheng Gan, George Blankson Abaka-Wood, Enze Li","doi":"10.3390/min15010078","DOIUrl":"https://doi.org/10.3390/min15010078","url":null,"abstract":"With the advancement of large-scale coal development and utilization, low-rank coal (LRC) is increasingly gaining prominence in the energy sector. Upgrading and ash reduction are key to the clean utilization of LRC. Flotation technology based on gas/liquid/solid interfacial interactions remains an effective way to recover combustible materials and realize the clean utilization of coal. The traditional collector, kerosene, has demonstrated its inefficiency and environmental toxicity in the flotation of LRC. In this study, four eco-friendly tetrahydrofuran ester compounds (THF-series) were investigated as novel collectors to improve the flotation performance of LRC. The flotation results showed that THF-series collectors were more effective than kerosene in enhancing the LRC flotation. Among these, tetrahydrofurfuryl butyrate (THFB) exhibited the best performance, with combustible material recovery and flotation perfection factors 79.79% and 15.05% higher than those of kerosene, respectively, at a dosage of 1.2 kg/t. Characterization results indicated that THF-series collectors rapidly adsorbed onto the LRC surface via hydrogen bonding, resulting in stronger hydrophobicity and higher electronegativity. High-speed camera and particle image velocimeter (PIV) observation further demonstrated that THFB dispersed more evenly in the flotation system, reducing the lateral movement of bubbles during their ascent, lowering the impact of bubble wakes on coal particles, and promoting the stable adhesion of bubbles to the LRC surface within a shorter time (16.65 ms), thereby preventing entrainment effects. This study provides new insights and options for the green and efficient flotation of LRC.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 1","pages":"78-78"},"PeriodicalIF":0.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/1/78/pdf?version=1736947510","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

The Adsorption Characteristics of Calcium Ions on Spodumene with Different Colors and Their Associated Activation Mechanism 不同颜色锂辉石对钙离子的吸附特性及其活化机理

4区地球科学

Minerals Pub Date : 2025-01-02 DOI: 10.3390/min15010048

Guangli Zhu, Ruping Wang, Yan Zheng, Xu Dong Zhang, Yuzhe Zhang, Chao Li, Guosheng Li, Yijun Cao

{"title":"The Adsorption Characteristics of Calcium Ions on Spodumene with Different Colors and Their Associated Activation Mechanism","authors":"Guangli Zhu, Ruping Wang, Yan Zheng, Xu Dong Zhang, Yuzhe Zhang, Chao Li, Guosheng Li, Yijun Cao","doi":"10.3390/min15010048","DOIUrl":"https://doi.org/10.3390/min15010048","url":null,"abstract":"This study investigates the activation behavior and mechanism of calcium ions on the flotation of spodumene with different colors. Using NaOL as a collector, in descending order of flotation recoveries were purple, pink, and white spodumene, while in the presence of CaCl2, the flotation recoveries were increased and the order was pink, white, and purple spodumene. The zeta potential, adsorption amount, contact angle, and AFM measurements demonstrated that calcium ions adsorbed on the spodumene surface and promoted NaOL adsorption in alkaline conditions. Species distribution analysis showed that Ca2+, Ca(OH)+, and Ca(OH)2 were essential components that play an activation role at pH = 12. The adsorption capacity and XPS results illustrated that CaCl2 activated spodumene flotation in two ways. One possibility involves calcium ions and their hydroxyl compounds being adsorbed on the spodumene surface, where Ca and Al sites favored OL− adsorption. The other possible way involves calcium ions and their hydroxyl compounds forming complexes with NaOL firstly in solution and then co-adsorbing on the spodumene surface. Quantum chemical calculations showed that the adsorption affinity on the spodumene surface in descending order was Ca2+, Ca(OH)2, and Ca(OH)+, and the pink spodumene was most preferably adsorbed, followed by the white spodumene, also consistent the flotation results.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 1","pages":"48-48"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/1/48/pdf?version=1735874246","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0