Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

{"title":"Enhanced adsorption of Sr2+ from water by K/N co-doped K2Ti4O9/ZrO2 nanocomposite: Structure, adsorption performance, and mechanisms","authors":"Xinran Xie ,&nbsp;Guoce Yu ,&nbsp;Jiang-Bo Huo ,&nbsp;Yongjie Yang","doi":"10.1016/j.colsurfa.2025.137854","DOIUrl":"10.1016/j.colsurfa.2025.137854","url":null,"abstract":"<div><div>Development of efficient nanocomposite adsorbents is of particular interest for treatment of radioactive wastewater by adsorption. In this study, a novel K/N co-doped K₂Ti₄O₉/ZrO₂ nanocomposite (denoted as NTZ-X-Y, X: temperature, Y: time) was synthesized by a solvent thermal coupling solid-phase melting calcination strategy. Detailed analysis indicated that calcination temperature and time, as well as K⁺/-NH₂ doping precisely engineered the mesoporous architecture (BET surface area: 117.46 m²/g; pore size: 7.96 nm) and enriched its active functional groups (Zr-O, Ti-O, O-H, C-N), thereby enhancing its adsorption performance. The optimized NTZ-500–3 exhibited exceptional Sr²⁺ adsorption capacity (31.76 mg/g). In binary systems with a molar ratio of Sr²⁺/Na⁺ or Cs⁺ of 1:10, the Sr²⁺ adsorption capacity decreased by only 3.81 and 4.39 mg/g, respectively, only about 1/5 of that of the control group. Thermodynamic analysis confirmed that the adsorption process was spontaneous and endothermic, while kinetic and isotherm modeling, specifically pseudo-second-order (<em>R</em>² = 0.997) and Freundlich (<em>R</em>² = 0.995) models, indicated the dominance of chemisorption. Density functional theory calculations further revealed that the adsorption mechanism involved synergistic contributions from ion exchange, surface complexation (predominantly via Zr-O coordination sites), electrostatic attraction, and pore filling. Our findings validated that the dual-functionalization strategy of K⁺/-NH₂ doping combined with controlled calcination created a hierarchical architecture with enhanced accessibility to active sites. This design leveraged the K₂Ti₄O₉ layered structure for rapid ion exchange and the high-affinity surface sites of ZrO₂ for selective complexation, offering a promising solution for efficient Sr²⁺ remediation in radioactive wastewater treatment.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137854"},"PeriodicalIF":5.4,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of a cold-resistant shelter: Assembly of bacteria on hierarchical porous material for low-temperature phenol bio-degradation and machine learning prediction","authors":"Yan Hai,&nbsp;Yunxing Zhao,&nbsp;Yao Wang,&nbsp;Zhiqiang Wang,&nbsp;Ting Li,&nbsp;Jianfeng Zhang,&nbsp;Jing Liang","doi":"10.1016/j.colsurfa.2025.137840","DOIUrl":"10.1016/j.colsurfa.2025.137840","url":null,"abstract":"<div><div>Low temperature significantly limit microbial growth and metabolism, thereby reducing the efficiency of pollutant degradation by environmental microorganisms. In this study, a hierarchical porous material (BF-PU-PI) was fabricated by the breath figure method. Through electrostatic interactions with the multifunctional groups on the microbial surface, <em>Bacillus cereus</em> ZWB3 was effectively assembled within the material, forming BF-PU-PI@ZWB3. Compared to ZWB3, BF-PU-PI@ZWB3 exhibited a 40 % higher phenol degradation rate. Interestingly, at 15 °C, it maintained high degradation efficiency, with a 36 % improvement over the ZWB3. The protective microenvironment provided by BF-PU-PI significantly enhanced the activities of key enzymes (phenol hydroxylase and catechol 1,2-dioxygenase), while alleviating intracellular oxidative stress. Furthermore, the thermal conductivity of BF-PU-PI was reduced to 0.0167–0.0333 W/(m·K) compared to PU, partially substituting for extracellular polysaccharides and free fatty acids to offer thermal insulation. This thermal regulation promoted the low-temperature metabolic activity of ZWB3 for phenol degradation. Machine learning models further predicted that BF-PU-PI@ZWB3 could sustain phenol degradation activity even at 8 °C. This hierarchical porous material acts as a “cold-resistant shelter” for microorganisms, enabling efficient biodegradation under low-temperature.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137840"},"PeriodicalIF":5.4,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GeS monolayer as an emerging 2D semiconductor for heterojunction solar cells: A first principles and device-level study","authors":"Safdar Mehmood ,&nbsp;Yang Xia ,&nbsp;Furong Qu ,&nbsp;Weisen Hu","doi":"10.1016/j.colsurfa.2025.137839","DOIUrl":"10.1016/j.colsurfa.2025.137839","url":null,"abstract":"<div><div>Two dimensional materials have emerged as a promising new class of photovoltaic materials due to their unique optoelectronic properties and tunable structures, offering new strategies to improve solar cell performance. Here, we employed periodic density functional theory (DFT) and SCAPS 1D simulations to investigate the photovoltaic potential of GeS. At the HSE06 level of theory, the unstrained GeS monolayer exhibits a E_g of 2.36 eV. Optical characterization confirmed the material’s intrinsic anisotropy, while strain-induced structural changes and enthalpy variations were also quantified. In the <em>a</em>-lattice direction, tensile strain increased the band gap from 2.42 to 2.60 eV, whereas compressive strain from −1 % to −5 % reduced it from 2.25 to 2.00 eV. Similar trends were observed in the <em>b</em> and <em>ab</em> directions. SCAPS 1D simulations reveal a power conversion efficiency (PCE) of 6.70 %, demonstrating the feasibility of GeS for photovoltaic applications. Additionally, impedance spectroscopy analysis was further used to investigate the charge transfer dynamics and resistive behavior in heterojunction solar cells with varying GeS layer thicknesses. These findings underscore the potential of GeS as a promising 2D semiconductor for the next generation solar cells and provide a comprehensive theoretical and computational framework for optimizing its integration into silicon-based heterojunction devices.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137839"},"PeriodicalIF":5.4,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wireless modulation of magneto-responsive Schwann cells and DRG via integrating into topological electrospun ovalbumin scaffolds under external magnetic fields","authors":"Huoyun Shen ,&nbsp;Yuqing Shang ,&nbsp;Mingzhu Jia ,&nbsp;Hongxia Gao ,&nbsp;Lele Wang ,&nbsp;Yaqiong Liu ,&nbsp;Haoran Wang ,&nbsp;Zhenhua Gong ,&nbsp;Nana Jin ,&nbsp;Guicai Li","doi":"10.1016/j.colsurfa.2025.137826","DOIUrl":"10.1016/j.colsurfa.2025.137826","url":null,"abstract":"<div><div>Functional reconstruction following peripheral nerve injury (PNI) remains a critical clinical challenge. Magnetic stimulation and magnetically responsive neural cells can promote peripheral nerve regeneration and functional recovery, anisotropic topological structures facilitate directional nerve migration and enhance the regeneration process, while the combined application of magnetic stimulation, magnetically responsive neural cells, and anisotropic topology for PNI repair has rarely been reported. In this study, anisotropic topological ovalbumin (OVA) scaffolds were firstly fabricated via electrospinning, and magnetically responsive neural cells were engineered through incorporation of 3-aminopropyltriethoxysilane (APTES) -modified magnetic nanoparticles, which were subsequently integrated into the OVA topological scaffolds and stimulated by external magnetic field. The physicochemical properties—including morphology, mechanical properties, hydrophilicity, and biocompatibility—were systematically characterized. The behaviors of magnetized dorsal root ganglion (DRG) neurons and Schwann cells (RSC 96) were assessed under a static magnetic field. Molecular mechanisms were further investigated using RT-qPCR and Western blot (WB) analyses. The results demonstrated that under directional guidance of an external magnetic field, anisotropic topological scaffolds loaded with magnetically responsive neural cells, synergistically provided physical cues (topological structure), biochemical cues (magnetic stimulation), and a regenerative microenvironment. This combination effectively promoted directional migration of magnetized DRG neurons, oriented axonal growth, and enhanced proliferation, migration, and elongation of RSC 96 cells. Significant upregulation of genes associated with axonal guidance, proliferation, migration, axonal regeneration, and magnetoreception (Cntn2, Calm3, SERCA2a, Dpyd) was observed, along with increased expression of Growth-associated protein 43 (GAP43) in neurons. These effects collectively enabled wireless, non-invasive, and remote directional guidance of RSC 96 and neurons, facilitating improved reconnection at nerve defect sites. The study thus provides theoretical and experimental foundations for developing novel artificial nerve graft platforms.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137826"},"PeriodicalIF":5.4,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selective gas sensitivity characterisation based on transition metal doped WS₂ single molecule membrane and its application in lung cancer breath marker detection","authors":"Pengfei Jia ,&nbsp;Yujie Chen ,&nbsp;Wenhao Jiang ,&nbsp;Qingbin Zeng ,&nbsp;Min Xu ,&nbsp;Yunhan Jia","doi":"10.1016/j.colsurfa.2025.137846","DOIUrl":"10.1016/j.colsurfa.2025.137846","url":null,"abstract":"<div><div>Lung cancer is the leading cause of cancer-related deaths worldwide, and innovation in early diagnostic techniques is urgently needed. In recent years, novel sensing technologies based on the detection of volatile organic compounds (VOCs) in exhaled breath have shown great potential in the field of early lung cancer screening due to their advantages of being non-invasive, convenient, and highly sensitive. In this study, the sensing properties of transition metal (Cu, Ag, Pt)-doped WS₂ monolayers for lung cancer-specific VOCs were systematically investigated through the innovative application of density functional theory. The results demonstrate that all three doped systems exhibit excellent thermal stability, and their VOCs adsorption capacity is significantly enhanced compared with that of pristine WS₂. This ensures stable desorption and sensing performance of the material in high-temperature operating environments. Notably, the Ag-WS₂ system performs particularly well in key performance indicators such as charge transfer, bandgap modulation, and recovery time, showing superior adsorption properties for four typical lung cancer biomarkers. More importantly, the Ag-WS₂ system exhibits a unique CO₂-repelling property, which significantly improves detection accuracy. This effectively addresses the common issue of cross-sensitivity interference in traditional methods and provides a theoretical basis for the accurate qualitative analysis of lung cancer-specific VOC mixtures. These research findings not only pave the way for the development of novel early diagnostic techniques for lung cancer but also provide an important scientific reference for preventive lung cancer screening.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137846"},"PeriodicalIF":4.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lightweight and robust aerogel assembling with aramid nanofibers and biomass-derived magnetic carbon nanoparticles toward advanced microwave absorption and infrared stealth","authors":"Min-yu Li ,&nbsp;Yuan-lin Yan ,&nbsp;Xing-hai Zhou ,&nbsp;Yuan Gao ,&nbsp;Gang Wang ,&nbsp;Li-hua Lyu ,&nbsp;Yong-fang Qian ,&nbsp;Shang-ru Zhai ,&nbsp;Hong-zhu Liu ,&nbsp;Zhong-gang Wang","doi":"10.1016/j.colsurfa.2025.137797","DOIUrl":"10.1016/j.colsurfa.2025.137797","url":null,"abstract":"<div><div>Carbon aerogel exhibits unique advantages in microwave absorption and infrared stealth applications owing to its ultralow density, high porosity, and continuous three-dimensional conductive networks. Nevertheless, developing carbon aerogel with excellent mechanical robustness to meet the practical application demands remains a significant challenge. Herein, a lightweight and robust aerogel assembling with biomass-derived magnetic nickel/carbon (Ni/C) nanoparticles and aramid nanofibers (ANF) is successfully constructed. The magnetic Ni/C nanoparticles are synthesized via an innovative wet-spraying technique that fully exploits the strong chelation capability of biomass sodium alginate toward metallic nickel ions. After high-temperature carbonization, this process yields magnetic Ni/C nanoparticles with high specific surface area, and offers advantages of simple processing procedures and high yield. Concurrently, the ANF is fabricated by a scalable top-down deprotonation approach, acting as a supportive skeleton to ensure structural integrity and mechanical robustness. The optimized aerogel delivers a unique lamellar network architecture with an ultra-low density of 0.0168 g/cm³ and outstanding elastic recovery exceeding 95 % after 100 cycles at 40 % strain. Consequently, the optimized aerogel delivers remarkable electromagnetic microwave absorption (EMA) performance, achieving a minimum reflection loss (RL_min) of −49.497 dB at 14.87 GHz, and an effective absorption bandwidth (EAB) of 5.41 GHz at a thickness of 2.0 mm. Simultaneously, the optimized aerogel exhibits excellent infrared (IR) stealth capability. After being exposed to IR radiation for 60 min on a heating platform at 80 ℃, the surface temperature of the optimized aerogel only rise from 25.3 ℃ to 26.9 ℃. This study provides a strategic paradigm for designing aerogel material with balanced mechanical properties and multi-functional performance.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137797"},"PeriodicalIF":4.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Injectable poly(ethylene glycol)/chitosan-based in situ hydrogel with wonderful mechanical property for wound dressing","authors":"Fan Li ,&nbsp;Yimeng Liu ,&nbsp;Jun Wang ,&nbsp;Yu Zhou ,&nbsp;Junjie Tan ,&nbsp;Hongxiang Chen ,&nbsp;Hongye Yan ,&nbsp;Xinghua Liao","doi":"10.1016/j.colsurfa.2025.137841","DOIUrl":"10.1016/j.colsurfa.2025.137841","url":null,"abstract":"<div><div>To increase the water solubility of chitosan and enhance the mechanical strength of chitosan-based <em>in-situ</em> hydrogel, poly(ethylene glycol) monomethyl ether-grafted chitosan (PCS) was fabricated by a simple and efficient modification method with hexamethylene diisocyanate (HDI) as bridging agent, and then a series of poly(ethylene glycol)/chitosan-based <em>in situ</em> hydrogels (PCS@gel) were prepared from PCS and aldehyde-terminated poly(ethylene glycol) (DF-PEG) as cross-linking agent. The resultant PCS shows good water solubility in the absence of acid and its solid content is up to 8 wt%. By studying the effects of the mass ratio of PCS to DF-PEG and their solid content on the gel time and properties of PCS@gel, the results demonstrate that increasing the solid content of precursor solution can significantly shorten the gel time and improve its mechanical properties and adhesion strength. When the mass ratio of PCS to DF-PEG is 1:1, PCS@gel has a shorter gel time and higher mechanical strength. While the mass ratio of PCS to DF-PEG is 5:1, PCS@gel has better adhesion properties. Besides, PCS@gel also has good self-healing ability, antibacterial effect, low cytotoxicity and the ability to promote cell migration. Therefore, PCS@gel will have a promising application as a wound dressing.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137841"},"PeriodicalIF":4.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical Surface-Enhanced Raman Spectroscopy of acetaminophen: Adsorption dynamics and charge transfer mechanism","authors":"Matěj Kmetík ,&nbsp;Ivan Kopal ,&nbsp;Karolína Salvadori ,&nbsp;Gabriela Broncová ,&nbsp;Marcela Dendisová","doi":"10.1016/j.colsurfa.2025.137801","DOIUrl":"10.1016/j.colsurfa.2025.137801","url":null,"abstract":"<div><div>Electrochemical Surface-Enhanced Raman Spectroscopy (EC-SERS) enables detailed study of molecular adsorption and charge transfer at metal surfaces. This work investigates acetaminophen (AAP) adsorption on a roughened copper electrode using EC-SERS combined with cyclic voltammetry (CV). CV confirms AAP’s electrochemical stability within −1000 to 0 mV, allowing analysis of adsorption without redox interference. AAP rapidly adsorbs within eight CV cycles (∼13 min), forming stable surface complexes primarily through amine group interactions. Desorption is slower, indicated by gradual changes in electrochemical current and Raman signal during reverse scans. The highest SERS enhancement occurs at −600 mV, where optimal charge transfer and molecular orientation maximize signal intensity. Density functional theory calculations support experimental findings, confirming the formation of metal-molecule “complexes” consistent with observed vibrational modes. The study highlights the influence of applied potential on adsorption/desorption dynamics and demonstrates copper’s promise as an affordable EC-SERS substrate. Despite lower enhancement compared to noble metals, copper’s biocompatibility and surface versatility make it suitable for biomedical and environmental sensing applications. These insights contribute to the advancement of electrochemical sensors based on EC-SERS for pharmaceutical and bioanalytical uses.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137801"},"PeriodicalIF":4.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the enzyme-like acidic microenvironment in FER zeolite for N-alkylation of aniline with benzyl alcohol","authors":"Xinghao Shi,&nbsp;Lei Chen,&nbsp;Biao Meng,&nbsp;Xiaoling Liu,&nbsp;Jiao Wei,&nbsp;Meng Xu,&nbsp;Xinyu Zhu,&nbsp;Yang Yang,&nbsp;Yu Zhou,&nbsp;Jun Wang","doi":"10.1016/j.colsurfa.2025.137847","DOIUrl":"10.1016/j.colsurfa.2025.137847","url":null,"abstract":"<div><div>The ordered microchannels of zeolites provide a feasible opportunity to modulate the adsorption and diffusion of guest molecules depending on the matching of the molecular structure and porous characteristics, encouraging the exploration of enzyme-like specificity of zeolites in heterogeneous catalysis. In this work, we investigated the activity of FER, MFI, MOR, and BEA zeolites in the amination of aniline with benzyl alcohol. The influence of acid properties, morphology, and topology-related adsorption behavior was specially studied to uncover how the micro-environment determined the activities from the molecular level through Rietveld refinement. FER zeolites were found extremely active in the amination to give the 99 % conversion of aniline and 98.7 % yield of secondary amines. The T1 site in the cross-section of the 10-membered-ring (MR) channel and FER cavity was found as the active site. Aniline and benzyl alcohol adsorption on the T1 site was respectively preferred in the FER cavity and 10-MR channel, increasing the collision probability and thus enhancing the activity. This unique molecular recognition behavior in the confined space of zeolite is responsive to the remarkable and stable amination activity.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137847"},"PeriodicalIF":4.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144702379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the adsorption mechanism of green and efficient flotation reagents in the reverse flotation separation of limonite and quartz","authors":"Jianwei Yu ,&nbsp;Jin Yao ,&nbsp;Wanzhong Yin ,&nbsp;Xiufeng Gong ,&nbsp;Xueming Yin ,&nbsp;Xu Zhao","doi":"10.1016/j.colsurfa.2025.137849","DOIUrl":"10.1016/j.colsurfa.2025.137849","url":null,"abstract":"<div><div>This study achieved efficient reverse flotation separation of limonite and quartz using a green and efficient flotation reagent, polyaspartic acid (PASP), in the dodecylamine (DDA) flotation system. The flotation test found that under the conditions of pH 6, DDA concentration of 75 mg/L, and PASP concentration of 5 mg/L, the most significant flotation difference of 86.02 % was achieved between limonite and quartz. The contact angle test showed that after the simultaneous action of DDA and PASP, the contact angle of limonite decreased by 26.93° compared to DDA alone, while the contact angle of quartz increased by 8.68°. Zeta potential and infrared spectroscopy analysis indicated that PASP strongly adsorbed on limonite surface, hindering the adsorption of DDA on limonite surface, and weakly adsorbing on quartz surface, slightly affecting the adsorption of DDA on the surface of quartz. XPS analysis showed that PASP had a strong adsorption effect on Fe sites on limonite, while its effect on Si sites on quartz surface was weak, indicating selective adsorption characteristics on limonite. Extended Derjaguin–Landau–Verwey–Overbeek (E–DLVO) theoretical calculations showed that the introduction of PASP transformed the total mutual attraction energy between limonite particles and bubbles in the DDA system into total mutual repulsion energy, while the total mutual attraction energy between quartz particles and bubbles remained basically unchanged, causing the sinking of limonite and the rising of quartz, which was beneficial for the reverse flotation separation of limonite and quartz.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"726 ","pages":"Article 137849"},"PeriodicalIF":4.9,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}