Article
Metallurgy & Metallurgical Engineering
George Blankson Abaka-Wood, Jonas Addai-Mensah, William Skinner
Summary: The study characterized tailings from a copper processing plant and found that they are rich in rare earth elements, with over 90% recovery achieved through froth flotation. With systematic optimization studies, further enhancement of rare earth element recovery and upgrade efficiency is possible.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2022)
Article
Metallurgy & Metallurgical Engineering
Adrian Carrillo Garcia, Mohammad Latifi, Jamal Chaouki
Summary: The study investigated the calcination process of a rare earth carbonatite ore from Niobec in Quebec, Canada, focusing on the decomposition of bastnasite and monazite. A global kinetic model was developed to represent the calcination kinetics of the whole ore based on individual calcination kinetics of the minerals nested in the ore. Initially developed for small particles, the model was later adapted to larger particle sizes by including coefficients based on physical particle size parameters.
Article
Geochemistry & Geophysics
Harry Watts, Tonya Fisher
Summary: Monazite is a poorly soluble rare earth phosphate mineral that is difficult to break down in industry processes using concentrated sulphuric acid or caustic soda. A new method has been developed for a direct and rapid breakdown of monazite through simple dissolution under milder conditions, avoiding the use of strong acids/bases and reducing the risk of dust exposure from fine grinding particles.
Article
Engineering, Chemical
Hongyu Sun, Shuai Wang, Lingyun Fei, Zhanfang Cao, Hong Zhong, Xin Ma
Summary: This study successfully achieved the separation of rhodochrosite from quartz and calcite by synthesizing a novel flotation collector. The analysis results showed that the collector could selectively adsorb on the surface of rhodochrosite, forming specific chemical structures, while having no significant interaction with quartz and calcite, thus achieving flotation separation.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Yujie Hu, Guohua Ye, Qi Zuo, Wei Xiao, Xuanxiong Kang, Xueyin Liang, Siqin Zhu
Summary: A new method of ilmenite surface modification based on sodium chlorite activation using sodium oleate as a collector was developed. Sodium chlorite induced a chemical reaction on the surface of ilmenite, converting more Fe2+ to Fe3+ and strengthening the adsorption of sodium oleate. The activation of ilmenite by sodium chlorite significantly increased the number of active sites on the surface and improved the floatability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Geochemistry & Geophysics
Hao Li, Gideon Lambiv Dzemua, Qi Liu
Summary: A preliminary beneficiation study was conducted on low-grade skarn phosphate rocks from the Mactung tungsten deposit in Canada, using standard Bond Work Index tests and flotation experiments, achieving a high recovery rate of phosphate concentrate.
Article
Engineering, Chemical
Cong Wang, Shuai Ren, Wei Sun, Sihui Wu, Liming Tao, Yao Duan, Jianjun Wang, Zhiyong Gao
Summary: By utilizing a specific combination of Pb(NO3)2, benzohydroxamic acid, and sodium oleate (Pb-BHA-NaOL), this study achieved successful selective separation of scheelite and calcite, offering insight for the design of other novel collectors and showing potential application prospects in scheelite flotation.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Physical
Qingyou Meng, Yusheng Du, Zhitao Yuan, Sainan Qi, Qianwen Li
Summary: In the industrial flotation separation process, the floatability of new low-TiO2 ilmenite is higher than that of common ilmenite, resulting in a decrease in the TiO2 grade of the final concentrate. It has been found that sulfuric acid pretreatment can improve the floatability of common ilmenite. However, this study discovered that sulfuric acid pretreatment decreases the floatability of new low-TiO2 ilmenite. The changes in NaOL adsorption and surface hydrophobicity of low-TiO2 ilmenite after acid surface pretreatment were responsible for the reduction in its flotation recovery.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Geology
Cristina Villanova-de-Benavent, Joaquin A. Proenza, Lisard Torro, Thomas Aiglsperger, Cristina Domenech, Diego Dominguez-Carretero, Xavier Llovet, Pol Suner, Australia Ramirez, Jesus Rodriguez
Summary: Karst bauxites from the Pedernales Peninsula in the Dominican Republic have great potential as non-conventional sources of rare earth elements (REE). This study focused on two bauxite deposits, Aceitillar and El Turco, which have contrasting REE contents and mineralogy. The characterisation of REE mineralisation was performed using various analytical techniques, providing insights into the formation of REE minerals in the supergene environment and their application in REE separation methods.
ORE GEOLOGY REVIEWS
(2023)
Article
Engineering, Chemical
Muhammad Kashif Nazir, Laurence Dyer, Bogale Tadesse, Boris Albijanic, Nadia Kashif
Summary: The research was conducted based on the grade engineering model for hard rock lithium ore extraction.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Kai Cheng, Xiqing Wu, Honghu Tang, Yong Zeng
Summary: The study found that the addition of PAAS before NaOL in flotation tests significantly increased the recovery rate of fine hematite, and successfully separated fine hematite from quartz. The findings suggest that the mechanism involves the flocculation of hematite particles by PAAS, which improves floatability and inhibits the adsorption of NaOL on quartz surfaces.
MINERALS ENGINEERING
(2022)
Article
Geochemistry & Geophysics
George Blankson Abaka-Wood, Bob Johnson, Jonas Addai-Mensah, William Skinner
Summary: This study aims to develop an efficient, cost-effective, and environmentally friendly processing method to extract rare earth elements (REE) from low-grade saprolite ore in Australia. The results show that using depressants and desliming techniques can improve the recovery and grade of REE, and further flotation studies may optimize the process.
Article
Chemistry, Physical
Hongli Fan, Wen Tan, Guangyi Liu
Summary: The study found that bastnasite exhibited good floatability using HDDPA as a collector at pH 7.0-10.0, with efficient separation from calcite at around pH 8.0. HDDPA(3)- anions were able to replace CO32- ions on the bastnasite surface, resulting in a high flotation recovery. However, increasing OH concentration reduced the floatability of bastnasite as competition with HDDPA anions intensified.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Geochemistry & Geophysics
Saizhen Jin, Leming Ou
Summary: This study investigated the aggregation and flotation behavior of fine scheelite and cassiterite in different systems. The results showed that fine minerals could aggregate under a NaOL system, but not under a BHA system. In the presence of Pb2+ + BHA, the minerals formed small and weak aggregates. Flotation tests demonstrated that increasing stirring time and speed improved the flotation rate and recovery when NaOL and BHA were added, but these changes were not significant in the Pb2+ + BHA system.
Article
Chemistry, Physical
Zhenhao Guan, Kuanwei Lu, Ying Zhang, Hu Yang, Xiaokang Li
Summary: The study found that the addition of manganese chloride increased scheelite recovery while decreasing calcite recovery, resulting in a significant difference in recovery between the two minerals for better separation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Multidisciplinary
M. R. Lepage, L. Vinnett, C. O. Gomez, O. Liboiron-Ladouceur, K. E. Waters
MEASUREMENT SCIENCE AND TECHNOLOGY
(2020)
Review
Chemistry, Physical
Christopher Marion, Ronghao Li, Kristian E. Waters
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2020)
Article
Engineering, Chemical
L. Vinnett, C. Marion, T. Grammatikopoulos, K. E. Waters
MINERALS ENGINEERING
(2020)
Article
Engineering, Chemical
M. R. Lepage, L. Visconti, O. Liboiron-Ladouceur, K. E. Waters
MINERALS ENGINEERING
(2020)
Article
Chemistry, Applied
R. Li, C. Marion, E. R. L. Espiritu, R. Multani, Xiaoqi Sun, K. E. Waters
Summary: A study evaluated an ionic liquid as a collector in bastnasite flotation, showing higher collectability for hematite than bastnasite. A two-stage flotation scheme was designed for better separation, achieving over 90% bastnasite recovery with a maximum upgrade ratio of 1.7.
JOURNAL OF RARE EARTHS
(2021)
Article
Geochemistry & Geophysics
Luis Vinnett, Kristian E. Waters
Article
Engineering, Chemical
L. Vinnett, J. Yianatos, L. Arismendi, K. E. Waters
MINERALS ENGINEERING
(2020)
Article
Geochemistry & Geophysics
Sungjae Moon, Frank Rosenblum, Yuehua Tan, Kristian E. Waters, James A. Finch
Article
Geochemistry & Geophysics
Mark R. Lepage, Cesar O. Gomez, Kristian E. Waters
Summary: The metallurgical performance of a flotation machine is greatly influenced by phenomena occurring in the froth zone. This study focuses on measuring the water content in the froth zone as an indicator for efficient operation. The results show that frother concentration has a stronger impact on the top-of-froth water content compared to gas flow rate.
Article
Geochemistry & Geophysics
Pengbo Chu, Ronghao Li, Mark Lepage, Kristian Waters
Summary: This study focuses on the impact of electrolytes on bubble break-up, revealing that an increase in electrolyte concentration results in larger bubbles produced through break-up, contrary to common observations. Additionally, it is found that electrolytes affect bubble break-up by altering the capillary wave on the bubble surface, different from the mechanism of surfactants.
Article
Materials Science, Ceramics
Tiantian Yin, Kristian E. Waters, Philippe Ouzilleau, Md Towhidul Islam, Ifty Ahmed, Showan N. Nazhat
Summary: This study applied DVS with in-situ Raman spectroscopy to investigate the effect of sodium content on the aqueous reactivity of binary SBGs. It found that the glass characteristics and the threshold for sorption and crystallization varied with increasing sodium content. The study also revealed a correlation between vapor- and water-induced reactions in SBGs.
CERAMICS INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Dzmitry Pashkevich, Ronghao Li, Ozan Kokkilic, Kristian Edmund Waters
Summary: Temperature variations can have significant impacts on flotation performance, leading to operational and economic challenges. Improving flotation efficiency at cold temperatures is crucial for the sustainable development of the mining industry, especially as mining operations expand to northern regions and face the increasing influence of climate change-induced weather extremes. Through mono-mineral flotation tests, it was found that sulfide minerals exhibit similar patterns of recovery kinetics at different temperature conditions, with higher recovery and slower kinetics at lower temperatures and lower recoveries and faster kinetics at higher temperatures. The observed variations in foam height and stability at different temperatures also contribute to these findings.
Article
Geochemistry & Geophysics
Chaozhen Zheng, Kaixi Jiang, Zhanmin Cao, Derek O. Northwood, Kristian E. Waters, Haibei Wang, Sanping Liu, Kun'e Zhu, Hao Ma
Summary: This study investigated the behavior of copper-cobalt oxide ores under various conditions such as particle size, acidity, pulp density, temperature, leaching time, and reduction potential. XRD, optical microscopy, and ICP-OES methods were used to examine the samples. Copper and cobalt recovery reached high percentages with appropriate conditions, and the remaining metals were found in sulfide forms coated with calcium sulfate. A combination of flotation and agitation leaching further improved the metal recovery.
Article
Geochemistry & Geophysics
Meng Zhou, Ozan Kokkilic, Darryel Boucher, Mark Lepage, Thomas W. Leadbeater, Raymond Langlois, Kristian E. Waters
Summary: Developing dry separation methods, such as gas-solid fluidized beds, is crucial to replace water-based separation due to increasing water shortages. This study investigates particle motion in a fluidized bed using positron emission particle tracking (PEPT) technique, providing knowledge about separation mechanisms through direct visualization of the particle trajectory. The movements of different-sized beds are characterized by tracking single quartz and hematite particles, determining the separation behavior of heavy particles for different-sized fractions.
Article
Crystallography
Sofi Buzukashvili, Weiqing Hu, Roberto Sommerville, Oliver Brooks, Ozan Kokkilic, Neil A. Rowson, Philippe Ouzilleau, Kristian E. Waters
Summary: Zeolites are widely used in various applications, such as wastewater treatment for heavy metal removal. However, separating small-sized zeolite particles from treated water is often difficult. In this study, a new method using a colloidal polyvinyl alcohol (PVA) solution to bind iron oxide nanoparticles to Linde Type A (LTA) zeolite was used to synthesize magnetic zeolite. Different ratios of zeolite to iron oxide nanoparticles were tested for Cu removal in batch adsorption experiments. The results showed that the magnetic zeolite maintained its adsorption properties and simplified the process design. Magnetic separation was then used to remove the magnetic zeolite from the treated solution.
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)