Article
Materials Science, Multidisciplinary
Chuncheng Zhu, Xinbo Hu, Yu Lei, Qian Xu, Xingli Zou, Hongwei Cheng, Xionggang Lu
Summary: This study focuses on the mechanism of chloride in leaching nickel matte. The results showed that chloride can enhance the leaching effect by increasing the surface area of the product layer. The dissolution of nickel and copper ions, as well as the oxidation of sulfur element, can be effectively controlled by potentiostatic polarization.
Article
Engineering, Environmental
Guillermo Hein, Harshit Mahandra, Ahmad Ghahreman
Summary: This study reports for the first time the capacity of Phanerochaete chrysosporium to oxidize a low-grade refractory gold ore at circumneutral pH. By optimizing the conditions, a significant sulfide oxidation and gold recovery were achieved, with even higher efficiency achieved through replenishing the fungal culture.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Materials Science, Multidisciplinary
Jingyuan Xu, Shuchen Qin, Chaozhen Zheng, Jun Wang, Biwen Yang, Guanzhou Qiu, Senlin Cui, Hao Ma
Summary: To optimize the leaching efficiency of copper and cobalt from Congo's copper-cobalt ore, various operating parameters were investigated. Adjusting particle size, pulp density, acidity, leaching time, and reductant can achieve high recovery rates.
Article
Multidisciplinary Sciences
Xing Chen, Xiao-Ting Wang, Jia-Bo Le, Shu-Min Li, Xue Wang, Yu-Jin Zhang, Petar Radjenovic, Yu Zhao, Yao-Hui Wang, Xiu-Mei Lin, Jin-Chao Dong, Jian-Feng Li
Summary: Ruthenium shows comparable or even better activity than platinum for alkaline hydrogen evolution reaction, but its mechanistic aspects are not yet resolved. In this study, in situ Raman spectroscopy and theoretical calculations are combined to elucidate the dynamic spectral evidence of Ru surfaces, interfacial water, *H, and *OH intermediates. The different valence states of Ru surfaces, as well as the hydrated Na+ ion water and high-valence Ru(n+) surfaces, contribute to the dissociation of interfacial water and the generation of two distinct *H, leading to different activities. The regulation of valence state on interfacial water, intermediates, and catalytic activity provides guidelines for the rational design of high-efficiency catalysts.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Yalong Ma, Yi Yang, Rong Fan, Xiyu Gao, Lei Zheng, Miao Chen
Summary: The study found that Cu(II) ions were more effective than dissolved oxygen for oxidizing chalcopyrite in ammonium chloride solutions. The dissolution rate of chalcopyrite was controlled by dissolved oxygen in the absence of Cu(II), and by Cu(II) once the copper concentration exceeded a certain level. Thiosulfate was identified as the primary soluble sulfur species during chalcopyrite dissolution.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Analytical
Qi Wang, Jianting Xiao, Ying Li, Yuan Lu, Jinjia Guo, Ye Tian, Lihui Ren
Summary: The identification of ore samples is highly significant for mineral exploration and planetary geological evolution research. By combining Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS), we have developed an efficient method for ore identification. We trained a convolutional neural network (CNN) model using mid-level fusion spectra of ores and improved its classification performance with a hybrid feature selection method (AVPSO) based on analysis of variance (ANOVA) and particle swarm optimization (PSO). The proposed method achieves a 98% accuracy in ore sample identification, outperforming Raman (87.9% accuracy) and LIBS (91.3% accuracy) alone. This method holds great importance for rapid and accurate identification of ore samples.
ANALYTICA CHIMICA ACTA
(2023)
Article
Spectroscopy
Jordana Dias Santos, Priscila F. Pinto, Howell G. M. Edwards, Luiz F. Cappa de Oliveira
Summary: Vibrational spectroscopic techniques, such as Raman and infrared spectroscopy, have been increasingly utilized in the analytical studies of hair structures, showing efficiency in analyzing the permeation of cosmetic treatments into the hair fiber. These techniques demonstrated the internal characteristics of the fiber and the diffusion of different cosmetics, proving to be valuable tools for studying cosmetic permeation into the hair fiber and analyzing its external and internal structure.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Metallurgy & Metallurgical Engineering
Jakolien A. Strauss, Volha Bazhko, Genarro Ventruti, Xuan Liguo, Mario A. Gomez
Summary: Arsenic is a common contaminant in refractory gold ores/concentrates, and total pressure oxidation (POX) is considered the most suitable technology for its treatment. The behavior and stability of various Fe-As compounds formed at high temperatures in downstream gold processing steps remain uncertain. This study focused on the precipitation behavior of arsenic during autoclaving of arsenopyrite containing ore concentrates, revealing the formation of different Fe-As compounds and the impact of Fe/As ratio on their generation. The results showed that the amount of As-BFS decreased while that of BFAS increased as the Fe/As molar ratio in the concentrate feed increased.
Article
Metallurgy & Metallurgical Engineering
Xiaolong Zhang, Yuexin Han, S. K. Kawatra
Summary: The review highlights the influences of grinding media on various aspects of sulfide ores, including pulp chemical properties, particle size distribution, and flotation performance. It recommends ceramic balls and pebbles as the most promising grinding media for sulfide ores.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2021)
Article
Geochemistry & Geophysics
Matteo Pernechele, Angel Lopez, Diego Davoise, Maria Maestre, Uwe Konig, Nicholas Norberg
Summary: Blending is crucial in copper ore processing to maintain a constant feed for flotation cells, increase metal recovery rate, and reduce tailings. Quantitative XRD methods were used to optimize blending and detect penalty minerals in copper ores from Spain. The Rietveld method combined with cluster analysis, PLSR, and traditional chemical analysis offer a comprehensive characterization of the ore and the processing. Real-time decision making can be achieved through fully automated mineralogical monitoring.
Article
Engineering, Chemical
Ali Behrad Vakylabad, Sabereh Nazari, Esmaeel Darezereshki
Summary: Chloride addition was investigated to enhance the leaching rate of low-grade chalcopyrite ore, resulting in a significant improvement in copper recovery by reducing the precipitation of jarosite.
MINERALS ENGINEERING
(2022)
Article
Chemistry, Physical
Hongxiang Xu, Tianxiang Ye, Xingrong Zhang, Liang Lu, Wei Xiong, Yangge Zhu
Summary: In this study, N-thiourea-maleamic acid (TMA) was introduced as a depressant for chalcopyrite in flotation separation of Cu-Mo sulfide ores. The results showed that TMA was effective in separating chalcopyrite and molybdenite, with a high Mo recovery and depression of Cu.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Xinran Chen, Yang Li, Lu Chen, Lili Cui, Zhiyu Dou, Xingquan He, Meihong Fan, Tewodros Asefa
Summary: The synthesis of a highly efficient, stable, and easy-to-operate catalyst capable of simultaneously driving the hydrogen evolution and oxygen evolution reactions has been achieved in this study. The FeSPPc/CuxO/CF material exhibits high activity and stability in electrocatalyzing both HER and OER processes, with low overpotentials and high electrical conductivity, making it a promising candidate for water electrolysis.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Engineering, Environmental
Ling-Dong Shi, Han-Rui Ji, Rui Jin, Yan-Bo Chen, Tian-Yu Gao, Fang Ma, He-Ping Zhao
Summary: A novel concept of coupling biological selenate reduction to selenite and chemical sulfide-driven selenite reduction was proposed for simultaneous removal of selenate and sulfide contaminants in water bodies. The shortcut deselenization technique showed significant savings in operation time and carbon source compared to complete deselenization. The study demonstrated efficient co-removal of pollutants and production of highly purified selenium products suitable for further recovery and reuse.
Article
Chemistry, Physical
Yahui Wang, Qihuang Huo, Hongjun Fan, Jiancheng Wang, Liping Chang
Summary: This study systematically investigated the structure and stability of CuS (001) surfaces with vacancies using the DFT + U method, revealing that vacancies induce polysulfide formation on the surfaces, with a more significant effect observed on slab1.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Biochemical Research Methods
Jianlan Cui, Gregory A. Hope
JOURNAL OF SPECTROSCOPY
(2015)
Article
Engineering, Chemical
Alan N. Buckley, Gregory A. Hope, Gretel K. Parker, Eddie A. Petrovic, Ronald Woods
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2016)
Article
Engineering, Chemical
Kun Zhang, Gregory A. Hope, Alan N. Buckley, Haohua Li
MINERALS ENGINEERING
(2016)
Article
Engineering, Chemical
Jianlan Cui, Gregory A. Hope
MINERALS ENGINEERING
(2016)
Article
Engineering, Chemical
Alan N. Buckley, Gregory A. Hope, Gretel K. Parker, Johan Steyn, Ronald Woods
MINERALS ENGINEERING
(2017)
Article
Crystallography
H. H. Li, P. Zhang, C. L. Liang, J. Yang, M. Zhou, X. H. Lu, G. A. Hope
CRYSTAL RESEARCH AND TECHNOLOGY
(2012)
Article
Chemistry, Inorganic & Nuclear
Xingwang Ouyang, Shuaishuai Yuan, Qinbiao Qiu, Weiwei Zeng, Gregory A. Hope, Haohua Li
INORGANIC CHEMISTRY COMMUNICATIONS
(2014)
Article
Chemistry, Physical
Haohua Li, Cong Chen, Xinyou Huang, Yang Leng, Mengnan Hou, Xiaogu Xiao, Jie Bao, Jiali You, Wenwen Zhang, Yukun Wang, Juan Song, Yaping Wang, Qinqin Liu, Gregory A. Hope
JOURNAL OF POWER SOURCES
(2014)
Article
Engineering, Chemical
G. A. Hope, A. Numprasanthai, A. N. Buckley, G. K. Parker, G. Sheldon
MINERALS ENGINEERING
(2012)
Article
Engineering, Chemical
Gretel K. Parker, Alan N. Buckley, Ronald Woods, Gregory A. Hope
MINERALS ENGINEERING
(2012)
Article
Engineering, Chemical
Jianlan Cui, Gregory A. Hope, Alan N. Buckley
MINERALS ENGINEERING
(2012)
Article
Engineering, Chemical
G. A. Hope, A. N. Buckley, G. K. Parker, A. Numprasanthai, R. Woods, J. McLean
MINERALS ENGINEERING
(2012)
Article
Engineering, Chemical
Alan N. Buckley, Gregory A. Hope, Kenneth C. Lee, Eddie A. Petrovic, Ronald Woods
MINERALS ENGINEERING
(2014)
Article
Engineering, Chemical
Alan N. Buckley, Gregory A. Hope, Gretel K. Parker
MINERALS ENGINEERING
(2014)
Proceedings Paper
Electrochemistry
G. K. Parker, S. A. Holt, G. A. Hope
ELECTRODEPOSITION FUNDAMENTALS AND NEW MATERIALS (GENERAL) - 222ND ECS MEETING/PRIME 2012: DIETER M. KOLB MEMORIAL SYMPOSIUM
(2013)
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)