Article
Geosciences, Multidisciplinary
Tongxu Zhao, Shang Xu, Fang Hao
Summary: This paper discusses the interactions between clay minerals and organic matter, specifically focusing on adsorption as a crucial mechanism for preserving organic matter in sedimentary environments. The composition of clay minerals found in sediments serves as an indicator of the climatic and lithological characteristics of the provenance area. The physical and chemical properties of clay minerals and organic matter significantly influence adsorption, with smectite showing a higher affinity for organic matter. The preservation of organic matter through clay mineral adsorption is influenced by various factors, including nutrient disparities and water column conditions. The paper also highlights future research directions, such as reconstructing clay mineral assemblages and exploring the practical applications of clay minerals in shale oil and gas exploration.
EARTH-SCIENCE REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Vasiliy V. Sergeev, Olga Cheremisina, Alexander T. Fedorov, Alexandra A. Gorbacheva, Daniil A. Balandinsky
Summary: Apatite is the most important phosphate material used in agricultural and livestock chemical production. During the flotation process, a mixture of surfactants and collectors exhibits a synergistic effect on the mineral surface, improving the efficiency of flotation.
Article
Geosciences, Multidisciplinary
Geng Li, Yong Qin, Haipeng Yao, Xianqing Zhou, Xiaohu Xiao, Zhen Zhang
Summary: This study analyzed the pore characteristics and factors affecting the maximum methane adsorption capacity (MAC) of mudstone in the early diagenetic stage, as well as the contribution of clay mineral (CM) adsorption. The main controlling factors of MAC were found to be OM and CM, with a significant adsorption coupling effect between them. Additionally, the contribution rate of CM in mudstone was lower, while OM had a higher contribution rate to MAC. This study highlights the importance of considering both OM and CM when studying methane adsorption in mudstone during early diagenesis.
NATURAL RESOURCES RESEARCH
(2021)
Article
Engineering, Chemical
Xinyu Zhu, Yang Huang, Yangge Zhu, Na Sun, Weiqing Wang
Summary: The selective inhibition mechanism of oxalic acid on common calcium-bearing gangue minerals in bastnaesite flotation was studied, showing that oxalic acid competes with H205 for the active site on the surface of the gangue minerals, reducing their surface hydrophobicity and inhibiting their floating. In this process, fluorite is more inhibited than calcite.
MINERALS ENGINEERING
(2021)
Review
Mining & Mineral Processing
Qicheng Feng, Wenhang Yang, Shuming Wen, Han Wang, Wenjuan Zhao, Guang Han
Summary: This paper summarizes the surface properties and flotation behavior of copper oxide minerals, and reviews the flotation methods and interaction mechanism with reagents. Increasing active sites on the surface of copper oxide minerals is an effective way to achieve efficient flotation. Various perspectives for further research are proposed.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Aneesa Ahmad, Natalia Martsinovich
Summary: The binding of organic molecules on oxide mineral surfaces has a significant impact on soil fertility and stability. Aluminium oxide and hydroxide minerals have a strong affinity for organic matter. This study investigated the adsorption of small organic molecules and larger polysaccharide biomolecules on a hydroxylated alpha-Al2O3 surface using density functional theory (DFT) with empirical dispersion correction. The results showed that organic molecules form multiple hydrogen bonds with the surface, with carboxylic acid being the most favorable adsorbate. Biopolymers such as cellulose, chitin, chitosan, and pectin were also found to strongly adsorb on the surface.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Engineering, Chemical
Jialei Li, Wen Deng, Zhicheng Liu, Bin Pei, Shuai Ning, Zi Cai, Ruizeng Liu
Summary: In this study, the effect and mechanism of two components of dissolved natural organic matter (NOM), polysaccharides and proteins, on molybdenite flotation were investigated using sodium alginate (SA) and bovine serum albumin (BSA) as model compounds. The results showed that both polysaccharides and proteins could reduce the flotation recovery and surface hydrophobicity of molybdenite, with BSA having a more significant effect. The adsorption of both NOM components onto molybdenite surfaces was confirmed through various analytical techniques, with BSA showing stronger adsorption. This study revealed the detrimental effect of polysaccharides and proteins in process water on molybdenite flotation.
MINERALS ENGINEERING
(2023)
Article
Environmental Sciences
Pengke Yan, Xinhua Hao, Shaoliang Zhang
Summary: This article introduces a simple, cost-saving and high efficient method for the extraction and separation of microplastics from soil with high organic matter content. The study used different flotation and digestion solutions to extract microplastics and digest organic matter from the soil. The results showed that the best flotation solution was ZnCl2 with recovery rates ranging from 96.1% to 99.0%, and the best digestion method was H2SO4:H2O2 with a digestion rate of 89.3%. These findings were validated by known concentrations of microplastics and were successfully applied to extract microplastics from vegetable fields in Northeast China.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agronomy
Ksenia Kolchanova, Inna Tolpeshta, Yulia Izosimova
Summary: The interaction of organic matter with the mineral components of soil solid phase is crucial for regulating the carbon cycle and balance in the biosphere. The adsorption of fulvic acid and water-extractable organic matter onto kaolinite and muscovite alters the properties and heterogeneity of the organic matter, with hydrophobic components primarily being adsorbed on the mineral surfaces. The adsorption of organic matter is influenced by both the hydrophobic and hydrophilic components, as well as hydrophobic and electrostatic interactions, with different behaviors observed at varying pH levels.
Article
Environmental Sciences
Jie Cheng, Qi Ye, Zhijiang Lu, Jiangjiang Zhang, Lingzao Zeng, Sanjai J. Parikh, Wanzhu Ma, Caixian Tang, Jianming Xu, Yan He
Summary: This study reveals the significant contribution of minerals in soil organic pollutant retention, especially in subsurface soil or contaminated brownfields where the organic carbon content is very low, highlighting their predominant roles compared to soil organic matter.
ENVIRONMENTAL POLLUTION
(2021)
Review
Engineering, Chemical
Zhao Wei, Wei Sun, Haisheng Han, Xiahui Gui, Yaowen Xing
Summary: This paper summarizes the progress and prospects of scheelite flotation in various fields, including crystal chemistry, solution chemistry, interface chemistry, and coordination chemistry. The evolution of scheelite flotation processes has been driven by the advancement of flotation reagents, and the development and implementation of highly selective complexing agents will be a crucial avenue for future development.
MINERALS ENGINEERING
(2023)
Article
Chemistry, Physical
Chengwen Wang, Lei Sun, Qingqing Wang, Yanxiu Wang, Yang Cao, Xin Wang, Ping Chen, Wei Sun
Summary: The study found strong adsorption between NBH and malachite, with adsorption density correlated with NBH concentration. Through a series of experiments and analyses, the interaction process between malachite and NBH was summarized as activation, diffusion and reduction, combination, and redeposition.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Yonglei Wang, Jie Xue, Wentao Sun, Wenjuan Chen, Baosen Liu, Li Jin, Jianing Li, Jingjing Li, Liping Tian, Xiaobo Wang
Summary: This study set up an ozone microbubble-enhanced air flotation experiment to explore the removal trends of algal cells and algal organic matter pollution. Compared with the traditional process, the absorption rate and utilization rate of ozone were increased, and the removal effect of algal organic matter was greatly improved. The enhanced air flotation process with ozone microbubbles shows high feasibility and a good effect in the removal and control of water eutrophication.
Article
Astronomy & Astrophysics
Naoki Hirakawa, Yoko Kebukawa, Kensei Kobayashi, Hideyuki Nakano
Summary: The molecular structures and compositions of organic matter in primitive meteorites are influenced by the parent bodies and preaccretional history. Experimental heating of primordial organic matter analog with and without minerals shows that minerals can affect the decomposition and chemical reactions of organics, providing insights into the variations of organic matter in different types of chondrites.
Article
Chemistry, Physical
Huili Han, Wanzhong Yin, Bin Yang, Donghui Wang, Jin Yao, Zhanglei Zhu
Summary: This study systematically investigated the adsorption behavior of sodium oleate on hematite, limonite, and siderite and their corresponding flotation performance. The results showed that Fe atoms were the main active centers for the chemisorption of NaOL, with hematite and limonite having more active sites for NaOL adsorption compared to siderite.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Review
Metallurgy & Metallurgical Engineering
Saeed Farrokhpay, Lev Filippov, Daniel Fornasiero
Summary: Flotation of fine particles poses challenges due to their large surface area and low collision efficiency with bubbles. Strategies to address this issue include increasing particle size, reducing bubble size, and utilizing reactor-separator type flotation cells for stronger particle-bubble interaction. The paper discusses the advantages and disadvantages of these strategies.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2021)
Article
Engineering, Chemical
Maria Sinche-Gonzalez, Daniel Fornasiero
Summary: Water quality has a significant impact on the flotation recovery and separation of minerals. The presence of sulphate ions in high concentrations in water can lead to increased surface oxidation, reducing particle-bubble attachment and inhibiting molybdenite flotation. In the flotation of copper ores, the increased recovery of unwanted minerals results in lower grades of chalcopyrite and molybdenite.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
B. Amankwaa-Kyeremeh, J. Zhang, M. Zanin, W. Skinner, R. K. Asamoah
Summary: The study investigated the use of Gaussian Process Regression (GPR) models in predicting rougher copper recovery, with results showing that the exponential GPR algorithm combined with relevant rougher flotation variables can effectively make predictions. Additionally, the Regularised Neighbourhood Component Analysis algorithm performed better in selecting useful flotation variables for prediction. Sensitivity analysis indicated feed particle size as the most influential input variable in rougher copper recovery prediction.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Kwaku Boateng Owusu, John Karageorgos, Christopher Greet, Massimiliano Zanin, William Skinner, Richmond K. Asamoah
Summary: The present study investigates the prediction of ore grindability characteristics and varying pulp densities through acoustic measurements on the Magotteaux ball mill. It was found that the model quartz sample emits higher energies than the iron ore sample during grinding, correlating with their different hardness properties. The noise intensities of both samples decrease significantly with increasing grind time, and there are marginal differences in acoustic emission among the selected pulp densities.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Kwaku Boateng Owusu, Massimiliano Zanin, William Skinner, Richmond K. Asamoah
Summary: This study investigated the acoustic characteristics of different mill operating conditions using a laboratory-based AG/SAG mill and acoustic sensor. The results showed variations in acoustic emission under different load conditions and the dampening effects of water and rock on mill noise emission in the presence of steel balls. Mill rotational speed, charge load, and lifter height variations were found to be reflected well in the mill noise emission, supporting the use of mill acoustic sensing technique for improved process monitoring and optimization in AG/SAG mills.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Shihong Xu, Massimiliano Zanin, William Skinner, Susana Brito e Abreu
Summary: The study investigates the impact of different grinding conditions on the surface chemistry evolution of pyrite during the grinding process. It is found that grinding with forged steel media leads to low surface hydrophobicity, while grinding with high chrome steel media under nitrogen gas atmosphere increases the natural hydrophobicity of pyrite by reducing the reaction rate of fresh surfaces. This understanding is crucial for optimizing grinding and flotation operations in mineral processing plants.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Massimiliano Zanin, Eddie Chan, William Skinner
Summary: This study presents a practical model for predicting the fluidised bed porosity and apparent density of the HydroFloatTM as the teeter water velocity is varied. The model can be used to calculate the optimum settings to achieve the desired fluidised-bed porosity for different ores. The model is validated with good predictive capabilities on two different copper ores.
Article
Engineering, Chemical
Shihong Xu, Massimiliano Zanin, William Skinner, Susana Brito e Abreu
Summary: This paper studied the influence of grinding conditions on the pulp chemistry of oxidised pyrite and its subsequent flotation behavior. The results showed that both the surface chemistry of the pyrite particles and the pulp chemistry of the discharge had a significant impact on the flotation recovery of the ground samples, and different grinding conditions led to variations in these chemical properties.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
P. Forson, M. Zanin, G. Abaka-Wood, W. Skinner, R. K. Asamoah
Summary: The preferential interaction and flotation of Cu-activated arsenopyrite compared to pyrite was investigated using XPS and FTIR analysis. It was found that the extent of ferric hydroxide coverage on arsenopyrite was higher than that on pyrite. The higher adsorption of Cu(I) on pyrite compared to arsenopyrite was inconsistent with their flotation performance.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
J. B. Dankwah, R. K. Asamoah, M. Zanin, W. Skinner
Summary: This study investigates the impact of superficial water rate, superficial gas rate, and bed particle size on bed-level and coarse particle flotation performance. The results show that bed-level increases with increasing superficial water rate, but the rate of increase is limited by bed particle size. Bed-level decreases with increasing superficial gas rate, but the rate of decrease is lower for relatively coarser bed particle sizes.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
P. Forson, M. Zanin, W. Skinner, R. Asamoah
Summary: This study investigates the differences in oxidation rate and extent between model pyrite and arsenopyrite minerals, and explores the influence of pulp aeration. Through flotation and analysis, the reasons for selective flotation are determined, with the adsorption and oxidation of xanthate on the pyrite surface affecting the flotation performance at low collector concentration. Additionally, this study examines the flotation process of refractory ore containing gold, and obtains similar results.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
J. B. Dankwah, R. K. Asamoah, M. Zanin, W. Skinner
Summary: This study investigates the impact of fluid density on bubble-particle detachment and coarse particle flotation performance. The results show that coarser particles follow the detachment behavior of finer particles at increased fluid density, and flotation performance can be improved by controlling fluid density within a certain limit.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
T. Kayhko, M. Sinche-Gonzalez, S. Khizanishvili, J. Liipo
Summary: The use of geometallurgical modelling is becoming common in the design and operation of concentrator plants. The main objective is to simulate the metallurgical response of ore blends using kinetic models derived from experimental flotation tests. Predictive simulation can create cost savings and increase flexibility and certainty in the process design stage.
MINERALS ENGINEERING
(2022)
Review
Geochemistry & Geophysics
Nelson Herrera, Maria Sinche Gonzalez, Jarkko Okkonen, Raul Mollehuara
Summary: In the past two decades, the mining sector has increasingly adopted simulation and modelling techniques for decision-making processes. Soft computing techniques have emerged as viable alternatives to traditional statistical methods, especially in identifying key variables and enhancing monitoring and prediction accuracy in mineral processing.
Article
Mining & Mineral Processing
Richmond K. Asamoah, Massimiliano Zanin, William Skinner, Jonas Addai-Mensah
Summary: The study investigated the gold mineralisation and deportment in two refractory flotation concentrates and their corresponding bio-oxidised products using several analytical techniques. The results showed the presence of visible, polydispersed, and invisible gold particles, with invisible gold disseminated in arsenian pyrite and arsenopyrite mineral phases. The complex associations of visible gold particles with sulphides, silicates, and oxides were also observed, along with noticeable gold-sulphate mineral associations in the bio-oxidised products. Additionally, differences in gold mineralisation and association, such as the occurrence of gold in muscovite and jarosite-cemented gangue mineral agglomerates, were notable between the two bio-oxidised products.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY-TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY
(2021)
