Article
Metallurgy & Metallurgical Engineering
Shrey Agrawal, Shaila Mir, Nikhil Dhawan
Summary: The study found that charcoal exhibits better microwave heating response at low temperatures, while coal performs better at higher temperatures. Adding around 12% carbon is enough to produce concentrate with 61.8% iron grade, but increasing carbon dosage can decrease process separation efficiency.
MINING METALLURGY & EXPLORATION
(2021)
Article
Geosciences, Multidisciplinary
Leslie J. Robbins, Mojtaba Fakhraee, Albertus J. B. Smith, Brendan A. Bishop, Elizabeth D. Swanner, Caroline L. Peacock, Chang -Le Wang, Noah J. Planavsky, Christopher T. Reinhard, Sean A. Crowe, Timothy W. Lyons
Summary: Oxygenic photosynthesis is crucial for the existence of complex life on Earth, but determining its emergence has been challenging. Sedimentary manganese enrichments have been considered as evidence, but their relation to oxygenation has been debated. This review argues that the presence of shallow oxygenated seawater is necessary for significant sedimentary Mn enrichments, and suggests that oxygenic photosynthesis emerged hundreds of millions of years before irreversible atmospheric oxygenation.
EARTH-SCIENCE REVIEWS
(2023)
Article
Agricultural Engineering
Wei-Hao Huang, Rome-Ming Wu, Jo-Shu Chang, Shiang-Ying Juang, Duu-Jong Lee
Summary: Biochars derived from agricultural wastes were modified by manganese ferrite (MnFe2O4) co-precipitation and used as adsorbents for the removal of Cu(II) ions from water. The MnFe2O4-biochars exhibited rapid adsorption kinetics and significantly enhanced adsorption capacities. Complexation reactions involving carboxyl and hydroxyl groups in pristine biochars, as well as Mn-O and Fe-O groups in MnFe2O4-biochars, were identified as the principal adsorption mechanisms. The regenerated MnFe2O4-biochars could be reused for three cycles with a decline in maximum adsorption capacities.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Xianjun Xie, Chun Lu, Rui Xu, Xueqian Yang, Lu Yan, Chunli Su
Summary: Fe-Mn bimetallic oxides with mesoporous structure were synthesized and studied for arsenic removal, with Fe1Mn1-300 showing the largest specific surface area and maximum arsenic absorption capacity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
Dejin Qiu, Shiyu Wei, Abdallah Ahmed Elsherbiny, Dengwei Zhang, Yuandong Xiong, Han Wei, Yaowei Yu
Summary: This study investigates the potential of the direct reduction process of pellets in ironmaking to reduce carbon emissions. It focuses on the reduction behavior of hematite pellets in a hydrogen atmosphere at different temperatures. The evolution of the pellet's 3D structure during the reduction process is analyzed, and a modified unreacted shrinking core model is developed to accurately describe the reduction process.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Geochemistry & Geophysics
Andre Jorge Pinto, Nuria Sanchez-Pastor, Raul Santos Jorge
Summary: This study focuses on the textural, mineralogical, and chemical analysis of iron-manganese ores from a vein-hosted deposit in the Iberian Pyrite Belt, SW Portugal. The research identifies the different Fe and Mn phases present in the enriched ores, explores their chemical composition, and defines the mineral paragenetic pathway. The study demonstrates that changes in Eh/pH conditions can lead to goethite dissolution and the formation of various Mn oxides and secondary goethite through electrochemical reactions between Fe2+ and Mn4+.
Article
Biochemistry & Molecular Biology
Hebat-Allah S. Tohamy, Ghada Taha, Maha Sultan
Summary: DC was used to synthesize gelatin-cellulose dialdehyde for wastewater remediation and antimicrobial behavior support. Mn oxides synthesized in a green way were characterized by XRD and TEM. Mn oxides@DC/Gel nanocomposite was studied by various techniques and exhibited high adsorption capacity. The adsorption mechanisms of Mn oxides@DC/Gel nanocomposite aligned with Langmuir, Redlich-Peterson, and Freundlich models.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Geochemistry & Geophysics
Vadim S. Efimchenko, Nicolay Barkovskii, Vladimir K. Fedotov, Konstantin P. Meletov, Artem Prokoshin
Summary: This study investigated the hydrogen-induced decomposition of fayalite at high pressure and temperature conditions similar to the cores and mantles of icy satellites. The experiments showed that high-pressure deuteration invariably led to the chemical decomposition of fayalite, forming different solid products and accompanied by the formation of water.
AMERICAN MINERALOGIST
(2021)
Article
Chemistry, Physical
Zhongbing Wang, Wenbin Xu, Yingpeng Li, Zongwen Zhao, Fanghui Jie, Guisheng Zeng, Jie Lei, Hui Liu, Yunyan Wang
Summary: The dissolution behaviors of copper-containing sulfide (Cu2S) in fayalite-type slag have been studied through experiments and calculations. The formation of metallic copper particles, ferric iron, and matte (Cu2-xFexS) were observed during the dissolution process. Copper-doped fayalite was found to be the main phase causing the chemical loss of copper in the slag. However, through directional modification, efficient recovery of copper resources from slag can be achieved.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Environmental Sciences
J. X. Flores-Lasluisa, D. Salinas-Torres, M. Lopez-Ramon, C. Moreno-Castilla, M. A. Alvarez, E. Morallon, D. Cazorla-Amoros
Summary: The study showed that the calcination temperature of the synthesized MnFe2O4 solid nanospheres significantly influenced their electrocatalytic properties, while the presence of manganese species played a key role in the oxygen reduction reaction activity. Among the tested materials, MSN200/CB and MSN350/CB showed the best electrochemical performances and outstanding stability.
ENVIRONMENTAL RESEARCH
(2022)
Article
Multidisciplinary Sciences
Dongdong Wang, Jiawei Liu, Changlai Wang, Weiyun Zhang, Guangbao Yang, Yun Chen, Xiaodong Zhang, Yinglong Wu, Long Gu, Hongzhong Chen, Wei Yuan, Xiaokai Chen, Guofeng Liu, Bin Gao, Qianwang Chen, Yanli Zhao
Summary: Cancer immunotherapy is revolutionizing oncology and the combination of nanotechnology and immunotherapy provides an opportunity to enhance antitumor immune response. This study presents a mitochondria-targeting nanoplatform, MiBaMc, which consists of Prussian blue nanoparticles derived from bacteria and shows enhanced tumor inhibition in mouse models. The findings demonstrate the potential of targeted nanoparticles in boosting antitumor immunity.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Roman Solovov, Verbina Orlichenia, Boris Ershov
Summary: Zerovalent iron nanoparticles with spherical shape and narrow size distribution were prepared by photochemical reduction of iron(III) in isopropyl alcohol.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Mphoma S. Matseke, Haitao Zheng, Mkhulu K. Mathe, Emanuela Carleschi, Bryan Doyle
Summary: In this study, Co-doped MnFe2O4 electrocatalysts were found to have improved oxygen reduction reaction (ORR) performance, with MnFe1.5Co0.5O4/C electrocatalyst showing the best results. The Co doping resulted in smaller and more uniform particle sizes, more oxygen vacancies, enriched surface Mn3+ ions, and improved conductivity, all contributing to enhanced ORR activity compared to pristine MnFe2O4/C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Jie Qu, Naiju Che, Guoliang Niu, Longfei Liu, Chengliang Li, Yanli Liu
Summary: Biochars prepared from cotton straw, corn straw, and rice husk were modified with ball-milling and iron/manganese oxides to prepare Fe/Mn binary metal oxide-ball milled biochar (Fe/Mn-BMBCs). Fe/Mn-BMBCs had a rough surface with deposits of Fe/Mn oxide nanoparticles, larger specific surface areas, and more oxygen-containing functional groups compared to pristine biochars. The adsorption capacities of Cd2+ on Fe/Mn-BMBCs were 4.8-6.1 times higher than those of pristine biochars. The main mechanisms of Cd2+ adsorption on Fe/Mn-BMBCs were complexation with oxygen-bearing functional groups, ion exchange, Cd2+-pi interaction, and chemical precipitation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Chunyao Gu, Miao Cai, Peng He, Jianyu Zhu, Min Gan
Summary: By enveloping schwertmannite synthesized by Acidithiobacillus ferrooxidans biomineralization with polyvinyl alcohol and pyrolyzing them at a moderate temperature, a neutral network-like carbon encapsulated structure was obtained. This structure efficiently mediated oxalic acid (OA) to reduce Cr(VI), showing excellent performance in a wide pH range, multiple anions, and different water matrixes. The electron shuttle provided by the carbon encapsulated structure facilitated electron transfer, and the O-moieties on its surface initiated the Cr(VI) reduction process. Moreover, OA also raised the level of persistent free radicals in C-2.0-Sch-PVA, which was another important pathway for Cr(VI) reduction.
Review
Green & Sustainable Science & Technology
Elsayed Mousa, Chuan Wang, Johan Riesbeck, Mikael Larsson
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2016)
Article
Metallurgy & Metallurgical Engineering
Telkicherla Kamesh Sandeep Kumar, Martin Simonsson, Nurni Neelakanta Viswanathan, Hesham Ahmed, Charlotte Andersson, Abdel-Hady A. El-Geassy, Bo Bjorkman
STEEL RESEARCH INTERNATIONAL
(2018)
Article
Metallurgy & Metallurgical Engineering
A. M. Ahmed, A. A. El-Geassy, M. L. Mishreky
IRONMAKING & STEELMAKING
(2015)
Article
Metallurgy & Metallurgical Engineering
E. A. Mousa, S. Ghali
IRONMAKING & STEELMAKING
(2015)
Article
Metallurgy & Metallurgical Engineering
A. A. El-Geassy, M. Nasr, S. M. El-Raghy, A. A. Hammam
IRONMAKING & STEELMAKING
(2020)
Article
Chemistry, Multidisciplinary
Elsayed Mousa, Mania Kazemi, Mikael Larsson, Gert Karlsson, Erik Persson
APPLIED SCIENCES-BASEL
(2019)
Article
Green & Sustainable Science & Technology
Elsayed Mousa, Kurt Sjoblom
Summary: In this study, the potential of biochar in replacing pulverized coal injection (PCI) in blast furnaces was evaluated using the MASMOD model. By optimizing the moisture content of biochar and the oxygen enrichment in the blast, it is possible to achieve 100% replacement of pulverized coal without affecting the adiabatic flame temperature and top gas temperature.
Article
Green & Sustainable Science & Technology
Ario Fahimi, Serena Ducoli, Stefania Federici, Guozhu Ye, Elsayed Mousa, Patrizia Frontera, Elza Bontempi
Summary: This study investigates the sustainability of 33 different technologies for lithium-ion battery (LIB) recovery. The ESCAPE tool, which calculates embodied energy and carbon footprint, is used for evaluation. The results show that chemicals and ultrapure water consumption are the most energy-intensive processes, and pyrometallurgy can reduce carbon footprint and energy consumption compared to hydrometallurgy.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Ario Fahimi, Alessandra Zanoletti, Antonella Cornelio, Elsayed Mousa, Guozhu Ye, Patrizia Frontera, Laura Eleonora Depero, Elza Bontempi
Summary: This research evaluates the sustainability of recycling processes for spent lithium-ion batteries, specifically comparing the use of inorganic and organic acid for cobalt recovery. The study also considers the influence of each country's energy mix on the sustainability evaluation.
Article
Green & Sustainable Science & Technology
Elsayed Mousa, Xianfeng Hu, Ludvig Annhagen, Guozhu Ye, Antonella Cornelio, Ario Fahimi, Elza Bontempi, Patrizia Frontera, Charlotte Badenhorst, Ana Claudia Santos, Karen Moreira, Alexandra Guedes, Bruno Valentim
Summary: This paper reports on the characterization of two grades of black mass from spent lithium-ion batteries and their behavior during heating trials. The study provides important insights for optimizing lithium-ion battery recycling processes by fully characterizing black mass samples before and after heating.
Article
Chemistry, Physical
Karthik Manu, Elsayed Mousa, Hesham Ahmed, Mohamed Elsadek, Weihong Yang
Summary: This research work focuses on the feasibility of using organic binders for briquetting of pellet fines. The mechanical strength and reduction behavior of the produced briquettes were evaluated using a hydraulic compression testing machine and thermogravimetric analysis. Six organic binders and sodium silicate were tested, and a combination of 1.5 wt.% organic binder (either CB6 or Kempel) with 0.5 wt.% inorganic binder (sodium silicate) was found to achieve the required mechanical strength even after 100% reduction.
Article
Green & Sustainable Science & Technology
Harikrishnan Parathodiel, Elsayed Mousa, Hesham Ahmed, Mohamed Elsadek, Kerstin Forsberg, Charlotte Andersson
Summary: This study explores the feasibility of using organic binders to produce magnetite iron ore pellets, and compares the effects of different types and dosages of binders and moisture content on the characteristics and properties of the pellets. Organic binders show advantages in certain aspects, but have slightly lower performance in terms of firing compared to traditional binders. Cold-bonded pellets demonstrate a higher reduction rate.
Article
Green & Sustainable Science & Technology
Elsayed Mousa, Hesham Ahmed, Daniel Soderstrom
Summary: This study develops briquettes with the partial replacement of cement with alternative organic binders and demonstrates their potential in reducing energy consumption and CO2 emissions in blast furnaces.
Article
Green & Sustainable Science & Technology
Elsayed Mousa, Xianfeng Hu, Guozhu Ye
Summary: The recycling of valuable metals from spent lithium-ion batteries is crucial for sustainable production of new batteries and reducing reliance on virgin resources. This study investigates the smelting behavior of black mass (BM) from spent batteries and explores the effect of graphite on metal recovery. The results show that smelting the de-coked BM in a low-carbon steel bath is more efficient in metal recovery compared to smelting the briquette BM in a molten hot metal bath.
Proceedings Paper
Materials Science, Multidisciplinary
Abdel-Hady A. El-Geassy
2017 2ND INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS RESEARCH AND MANUFACTURING TECHNOLOGIES (AMRMT 2017)
(2017)