Minerals最新文献

{"title":"Cobalt Diffusion Treatment in Topaz: Process and Mechanism of Color Modification","authors":"Xiaoxu Yan, Suwei Yue, Zida Tong, Yuzhi Zhang, Yun Wu","doi":"10.3390/min16010094","DOIUrl":"https://doi.org/10.3390/min16010094","url":null,"abstract":"Topaz is one of the most economically important fluorine-rich nesosilicates, which are predominantly colorless in natural crystals. Hence, the trade relies almost entirely on irradiated blue topaz with an unstable color center, which has been shown to fade over time. The cobalt (Co) diffusion treatment is a stable alternative process for converting colorless topaz to blue by a solid-state diffusion mechanism. To investigate the potential role of Co2+ substitution in the formation of the blue layer and the coupled behavior of F/OH dehydroxylation in facilitating this process, systematic diffusion treatments have been successfully conducted and compared. In this study, gem-quality topazes were annealed in air at 1000 °C for 20–40 h (hr) along with CoO, Fe2O3, Cr2O3, and CuO powders. The diffused products were characterized using Scanning Electron Microscope (SEM), Ultraviolet-Visible absorption spectroscopy (UV-Vis), Near-Mid Infrared spectroscopy (NMIR), and X-ray photoelectron spectroscopy (XPS). Parallel runs with CuO, Fe2O3, or Cr2O3 alone confirmed that none of these oxides produces a stable blue layer, underscoring the unique role of Co. The Co-diffused sample displays an intense blue layer characterized by a Co2+ octahedral isomorphism triplet at 540, 580, and 630 nm, which are absent from both untreated and heat-only controls. XPS analysis reveals the emergence of Co2+ (binding energy: 780.63 eV) and a concomitant depletion in F−, along with the disappearance of the OH overtone absorption at 7123 cm−1. These observations confirm that defluorination generates octahedral vacancies accommodated by the coupled substitution: CoF2 (solid reactant) + (AlO2)− (fragment of topaz structure) → AlOF (solid product) + (CoOF)− (fragment of topaz structure). Prolonged annealing leads to decreased relative atomic percentages of K+ and F− ions, consistent with volatilization losses during the high-temperature process, thereby directly correlating color intensity with cobalt valence state, which transfers from Co2+ to Co3+. These findings establish a Co-incorporation chronometer for F–rich aluminosilicate systems, with an optimal annealing time of approximately 20 hr at 1000 °C. Furthermore, the above results demonstrate that the color mechanism in nesosilicate gems is simultaneously governed by volatile release and cation availability.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"16 1","pages":"94-94"},"PeriodicalIF":0.0,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/16/1/94/pdf?version=1768815707","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147897084","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}

{"title":"Critical Contribution of Biomass-Based Amendments in Mine Ecological Restoration: Properties, Functional Mechanisms, and Environmental Impacts","authors":"Si-Mai Peng, Xinyue Li, Jia Xie, Wenhui Liu, Su-Xin Li, Jianlan Luo, Lei Zhao","doi":"10.3390/min15121250","DOIUrl":"https://doi.org/10.3390/min15121250","url":null,"abstract":"Mining activities have caused widespread land degradation and contamination, affecting millions of hectares worldwide and posing persistent ecological risks. However, reclamation substrates are constrained by limited availability and compromised quality, which restricts their ability to fully support mine ecological restoration. Among various amendment materials, biomass-based amendments have been widely applied due to their broad availability, renewability, biodegradability, and low cost. In recent years, their role has expanded beyond simple nutrient supplementation to encompass multiple functions, including structural optimization, pollutant stabilization, and microbial regulation. This review highlights the valorisation of biomass-derived solid wastes as multifunctional amendments for mine ecological restoration. By converting agricultural and industrial wastes into green materials, these amendments improve substrate structure, stabilize heavy metals and organic pollutants, enhance nutrient cycling, and stimulate microbial activity. Potential risks, including nutrient leaching, secondary pollution, and greenhouse gas emissions, are critically assessed, with emphasis on their variability under different environmental conditions. By integrating functional benefits with ecological risks, this work underscores the critical role of biomass-based amendments as waste-to-resource strategies in advancing sustainable mine reclamation, contributing to circular economy goals, and supporting environmental engineering practices.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 12","pages":"1250-1250"},"PeriodicalIF":0.0,"publicationDate":"2025-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/12/1250/pdf?version=1764165040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147904726","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}

{"title":"Influence and Mechanism of 1-Dodecyl-3-methylimidazolium Bromide on the Flotation Behavior of Quartz and Feldspar in a Neutral System","authors":"Siyu Chen, Yuan Chen, Guohua Gu, Yao Xiang, Huanxiao Hu","doi":"10.3390/min15121235","DOIUrl":"https://doi.org/10.3390/min15121235","url":null,"abstract":"Quartz and feldspar have similar physical, chemical, and surface properties. Effectively separating them in near-neutral systems has long been a challenging research focus. This study introduces 1-Dodecyl-3-methylimidazolium bromide (DMB), an ionic liquid, as a collector in a quartz–feldspar flotation separation system to investigate its effects on the flotation behavior of quartz and feldspar. The interaction between the collector and the minerals is explained through zeta potential measurements, infrared spectroscopy analysis, and DFT calculations. The flotation test results indicate that DMB exhibits selective flotation separation properties enabling the separation of quartz from feldspar. Across the pH range of 3 to 11, DMB demonstrates high collection capability for quartz, but lower capability for feldspar. In particular, at pH levels of 7 to 8, the recovery difference between the two minerals exceeds 80%, achieving optimal selective separation. Mechanistic studies indicate that DMB primarily adsorbs on quartz and feldspar through electrostatic adsorption. The adsorption energy between DMB and quartz reaches −340.59 kJ/mol, forming a stable adsorption layer on the quartz surface. However, electrostatic repulsion arises over a broad area due to the large volume and cationic nature of DMB’s polar group and the exposed cationic Al sites on the feldspar surface, thereby hindering the interaction between DMB and feldspar. This research establishes the foundation for achieving efficient selective flotation separation of quartz and feldspar in a neutral system.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 12","pages":"1235-1235"},"PeriodicalIF":0.0,"publicationDate":"2025-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334051","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}

{"title":"Study on the Inhibition and Activation of Pyrite Under Low Alkalinity Conditions Created by Hydrogen Peroxide and Lime","authors":"Y. Yang, Milena Kostović, Rongdong Deng, Yuanxun Liao","doi":"10.3390/min15111177","DOIUrl":"https://doi.org/10.3390/min15111177","url":null,"abstract":"High alkalinity facilitates copper–sulfur flotation separation but also leads to issues such as high reagent consumption, pipeline scaling, and gold loss in tailings. The ore from a copper mine in Serbia contains 2.86% copper, 1.64 g/t gold, and 20.39% sulfur, with copper occurring mainly in covellite and enargite. To achieve efficient separation and recovery of copper–sulfur, a systematic study was conducted using micro-flotation, Scanning Electron Microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and contact angle analysis to investigate the inhibition and activation patterns of pyrite under low and high alkalinity conditions. The results indicate that the combined use of hydrogen peroxide and lime as inhibitor enables efficient separation of pyrite and covellite under low-alkalinity conditions. This effect is attributed to its ability to enhance oxidation of the pyrite surface, which generates more hydrophilic substances. Under low-alkalinity conditions (slurry pH = 10) regulated with hydrogen peroxide and lime in a covellite flotation cycle, and under acidic conditions (slurry pH = 6) in the pyrite flotation cycle, satisfactory results are obtained in both flotation cycles in comparison with industrial data. The copper flotation index was similar, but pyrite and gold recovery increased by 2.3% and ~4%, respectively, over those using lime alone. This process reduced the activator dosage required for pyrite activation substantially, while improving gold recovery. Results demonstrate an efficient method for copper–sulfur separation and recovery, providing theoretical guidance or industrial production processes.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 11","pages":"1177-1177"},"PeriodicalIF":0.0,"publicationDate":"2025-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/11/1177/pdf?version=1762603163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333855","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}

{"title":"Surface Charge and Size Evolution of Silica–Iron Colloidal Particles in Simulated Late-Archaean Seawater","authors":"Weimin Jiang, Xiao Wu, Hongmei Yang, Juan Fu, Qin Zeng, Shujuan Li, Rui Luo, Yiping Yang, Xiaoju Lin, Jianxi Zhu","doi":"10.3390/min15111123","DOIUrl":"https://doi.org/10.3390/min15111123","url":null,"abstract":"Late-Archean seawater functioned as a vast, redox-tuned colloidal system for which its kinetics were largely governed by the surface chemistry of silica–iron nanoparticles. By reproducing Archean seawater (≈0.7 M ionic strength, 25 °C) in laboratory anoxic-to-mildly oxic reactors, the ζ potential (zeta-potential(ζ)) of silica–iron nanoparticles was investigated, and we tracked how transient O2 pulses (≤9 mg L−1) regulated it. The zeta (ζ) potential was applied as the key diagnostic parameter to quantify both the sign of the ζ potential and the colloidal stability of simulated silica–iron particles in dispersion. Under strictly anoxic conditions, silica colloids (SiO2(aq)) exhibit a persistently negative ζ potential (ζ ≈ −25 mV) in the simulated seawater (pH 6.5), arising from deprotonated silanol groups (≡Si–O−). Upon the addition of Fe2+, the inner-sphere complexation of ferrous ions on SiO2 colloids partially replaces ≡Si–O− with ≡Si–O–Fe+/≡Si–O–Fe–OH sites; the net negative charge density at the outer Stern plane nevertheless increases, and the ζ potential shifts from −25 mV to −30 mV. As the simulated seawater was oxygenated, the dissolved and surface-bound Fe2+ ions were oxidized to Fe3+, causing the ζ potential to exceed −30 mV. This study demonstrates that Fe2+–silica interactions generate electrostatic destabilization, suspending micron-scale aggregates and thus modulating the solubility and speciation of SiO2 in early oceans. Also, transient micro-oxic pulses are shown to shift silica–iron colloids between metastable aggregation and dispersion by modulating their ζ potential. Subsequently, AFM and TEM were used to characterize the morphological changes in the colloidal particles from the liquid state to the dry state. Furthermore, infrared and XPS analyses were conducted on the colloidal samples. These findings provide certain reference significance for reconstructing the chemical evolution process of seawater in the Late-Archean period and for understanding the factors influencing the silicon–iron cycle of seawater in the Late-Archean era.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 11","pages":"1123-1123"},"PeriodicalIF":0.0,"publicationDate":"2025-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/11/1123/pdf?version=1761646226","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331604","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}

{"title":"Perspectives for High-Purity Quartz from European Resources","authors":"Kalyani Mohanty, Pura Alfonso, Josep Oliva Moncunill, Carlos Hoffmann Sampaio, Hernán Anticoi","doi":"10.3390/min15101080","DOIUrl":"https://doi.org/10.3390/min15101080","url":null,"abstract":"High-purity quartz (HPQ) is a critical raw material for advanced technologies including semiconductors, photovoltaic cells, and optical fibers. This study reviews the geological occurrence, beneficiation routes, and strategic significance of HPQ within the European context. Quartz processing follows a sequential flowsheet of comminution, magnetic separation, flotation, acid leaching, and thermal treatment, designed to remove mineral impurities such as Fe, Al, Ti, and mica. The resulting ultra-high-purity quartz (UHPQ) achieves the chemical and physical specifications required for high-tech industries. Quartz, which is the most common mineral on Earth, can be found in a variety of geological locations such as granitic rocks and pegmatites in the Variscan Belt, metamorphic quartzites, hydrothermal veins, and Pleistocene periglacial and aeolian sediments. Case studies of European deposits demonstrate that geological origin directly influences processing requirements, and that tailored beneficiation strategies are essential to unlock viable resources. To our knowledge, this is the first Europe-focused synthesis that links these findings with the EU Critical Raw Materials Act, the work that emphasizes the potential for domestic HPQ development to strengthen European supply chain resilience, reduce dependence on imports, and support the transition to a green and digital economy.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 10","pages":"1080-1080"},"PeriodicalIF":0.0,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/10/1080/pdf?version=1760628229","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147886991","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}

{"title":"Influence of Humic Acid on the Swelling Inhibition of Clay Minerals and Process Optimization","authors":"Ying Cheng, Dandan Zhang, Xing Gao, Junxia Yu, Ruan Chi, Bona Deng, Fang Zhou","doi":"10.3390/min15101062","DOIUrl":"https://doi.org/10.3390/min15101062","url":null,"abstract":"Medium and heavy rare earths (REEs) are mainly from weathered crust elution-deposited rare earth ores (WREOs), where REEs are adsorbed in ionic form on the surface of clay minerals such as kaolinite, illite, halloysite, etc. REEs in WREOs are extracted through the in situ leaching process with (NH4)2SO4 solution via ion exchange. However, this process often results in the swelling of clay minerals, subsequently destroying the ore body structure and causing landslides. This study investigated the inhibitory effects of humic acid (HA) on the swelling of primary clay minerals. An optimal inhibition on the swelling of clay minerals was demonstrated at 0.2 g/L. HA was mixed with 0.1 mol/L (NH4)2SO4 solution at the solution pH of 6.8 and temperature of 25 °C. The swelling efficiency of kaolinite, illite, and halloysite in presence of HA decreased by 0.29%, 1.19%, and 0.19%, respectively, compared to using (NH4)2SO4 alone. The surface hydration parameter of clay minerals was further calculated through viscosity theory. It was demonstrated that the surface hydration parameter of kaolinite and halloysite decreased nearly threefold, while that of illite decreased fivefold, demonstrating a desirable inhibition on clay swelling with HA. Viscosity theory offers valuable theoretical support for the development of anti-swelling agents.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 10","pages":"1062-1062"},"PeriodicalIF":0.0,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/10/1062/pdf?version=1760016647","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147892061","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}

{"title":"Mechanisms of Thermal Color Change in Brown Elbaite–Fluorelbaite Tourmaline: Insights from Trace Elements and Spectral Signatures","authors":"Kun Li, Suwei Yue","doi":"10.3390/min15101032","DOIUrl":"https://doi.org/10.3390/min15101032","url":null,"abstract":"This study investigates the mechanism behind the heat-induced color change (brown to yellowish green) in Mn- and Fe-rich elbaite tourmaline under reducing atmosphere at 500 °C. A combination of analytical techniques including gemological characterization, electron microprobe analysis (EMPA), laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and ultraviolet–visible (UV-Vis) spectroscopy was employed. Chemical analysis confirmed the samples as intermediate members of the elbaite–fluorelbaite series, with an average formula of X(Na0.66 □0.26 Ca0.08) Σ1.00Y(Li1.29Al1.10Mn0.31 Fe2+0.15Ti0.01Zn0.01) Σ2.87 ZAl6T[Si6O18] (BO3)3V(OH)3.00W(OH0.51F0.49) Σ1.00, enriched in Mn (17,346–20,669 μg/g) and Fe (8396–10,750 μg/g). Heat treatment enhanced transparency and induced strong pleochroism (yellowish green parallel c-axis, brown perpendicular c-axis). UV-Vis spectroscopy identified the brown color origin in the parallel c-axis direction: absorption bands at 730 nm (Fe2+ d–d transition, 5T2g → 5Eg), 540 nm (Fe2+→Fe3+ intervalence charge transfer, IVCT), and 415 nm (Fe2+→Ti4+ IVCT + possible Mn2+ contribution). Post-treatment, the 540 nm band vanished, creating a green transmission window and causing the color shift parallel the c-axis. The spectra perpendicular to the c-axis remained largely unchanged. The disappearance of the 540 nm band, attributed to the reduction of Fe3+ to Fe2+ eliminating the Fe2+–Fe3+ pair interaction required for IVCT, is the primary color change mechanism. The parallel c-axis section of the samples shows brown and yellow-green dichroism after heat treatment. A decrease in the IR intensity at 4170 cm−1 indicates a reduced Fe3+ concentration. The weakening or disappearance of the 4721 cm−1 absorption band of the infrared spectrum and the near-infrared 976 nm absorption band of the ultraviolet–visible spectrum provides diagnostic indicators for identifying heat treatment in similar brown elbaite–fluorelbaite.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 10","pages":"1032-1032"},"PeriodicalIF":0.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/10/1032/pdf?version=1759128469","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147920537","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}

{"title":"Distribution of Metals in Soils Surrounding Tailing Flotation Storages in Copper-Bearing Areas in Lower Silesia","authors":"Agata Duczmal-Czernikiewicz, Natalia Hoska, Maciej Swęd, Marcin Siepak","doi":"10.3390/min15090992","DOIUrl":"https://doi.org/10.3390/min15090992","url":null,"abstract":"One of the most critical issues in soil science is the content of metals and their environmental toxicity. This is especially relevant to soil contamination by metals in industrial and postindustrial areas. The region of Lower Silesia, known for exploitation of Cu and Ag deposits, along with Zn and Pb, is significantly affected by metal contamination near post-flotation waste facilities in both old and new copper districts. Metal concentrations in soils adjacent to abandoned tailings storage facilities in the copper district were measured to identify factors influencing contamination in agricultural and technogenic soils. Concentrations of copper, lead, and zinc were determined in 111 samples taken from nine soil profiles down to a depth of 1.60 m. Significant variation was observed in metal content: in agricultural soils, copper reached up to 2800 mg/kg, lead up to 150 mg/kg, and zinc up to 65 mg/kg. In forest soils, concentrations reached as high as 1700 mg/kg for copper, 1800 mg/kg for lead, and up to 1100 mg/kg for zinc. The metal content increased with proximity to the tailings storage. Soil profiles closest to the emission source showed the highest metal concentrations, while concentrations of Cu, Pb, and Zn decreased with distance.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 9","pages":"992-992"},"PeriodicalIF":0.0,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147908507","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}

{"title":"A Fundamental Study on the Selective Flotation Separation of Magnesite and Quartz Using an Eco-Friendly Collector PKO-H: A Performance and Adsorption Mechanism Study","authors":"Lifeng Ma, Hailiang Zhang, Guosong Zhang, Ziheng Fan, Panxing Zhao","doi":"10.3390/min15090933","DOIUrl":"https://doi.org/10.3390/min15090933","url":null,"abstract":"To achieve efficient desilication and improve the grade of magnesite, an environmentally friendly surfactant, cocamidopropyl dimethylamine (PKO-H), was employed as a collector for the flotation separation of magnesite and quartz. The flotation performance and adsorption mechanism of PKO-H was systematically investigated through flotation experiments, Fourier-transform infrared spectroscopy (FTIR), contact angle measurements, zeta potential analysis, and molecular simulations. The flotation results demonstrated that PKO-H exhibited excellent selectivity, achieving a MgO recovery rate of 98.8% and a concentrate grade of 45.7% in artificially mixed mineral samples. Contact angle measurements, FTIR spectra, zeta potential analysis, and molecular simulations revealed that the adsorption of PKO-H on quartz is primarily driven by electrostatic attraction. In contrast, due to electrostatic repulsion, the interaction between PKO-H and magnesite is weak, preventing stable adsorption. This study establishes PKO-H as a sustainable and efficient collector for magnesite beneficiation and provides new insights into interfacial mechanisms for the design of eco-friendly flotation reagents.","PeriodicalId":18601,"journal":{"name":"Minerals","volume":"15 9","pages":"933-933"},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2075-163X/15/9/933/pdf?version=1756722614","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333538","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}