Article
Engineering, Chemical
Jianwei Ji, Shuo Ai, Wanguo Yu, Linghui Liu, Yue Qin
Summary: Methyl glycolate (MG) can be selectively converted into magnesium glycolate through MgO-mediated hydrolysis reactions in the presence of methyl levulinate (MLE), with a conversion rate of 95.2% for MG and 15.1% for MLE. The catalysts on MgO played a crucial role in the catalytic activity, and the precipitation of magnesium glycolate affected the chemical equilibrium of MG hydrolysis. Energy barrier calculations demonstrated that the hydrolysis of MG had lower energy barriers compared to MLE. This study provides insights into the selective hydrolysis of esters and complete hydrolysis of an ester.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Agriculture, Dairy & Animal Science
R. R. Lobo, J. A. Arce-Cordero, S. So, M. Soltis, M. Nehme Marinho, B. C. Agustinho, A. D. Ravelo, J. R. Vinyard, M. L. Johnson, H. F. Monteiro, E. Sarmikasoglou, A. P. Faciola
Summary: The objective of this study was to evaluate the effects of replacing magnesium oxide (MgO) with calcium-magnesium hydroxide (CaMg(OH)2) on Holstein dairy cows. The results showed that CaMg(OH)2 can be used as a substitute for MgO without affecting the performance and overall physiological response of the cows.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Zhuldyz Sagdoldina, Konstantin Shestakov, Michael Yermolenko, Manarbek Kylyshkanov, Mikhail Podoinikov, Bauyrzhan Rakhadilov, Yedilzhan Kambarov
Summary: This work discusses the possibility of decomposing magnesium fluoride by ionized water vapor to form solid magnesium oxide and hydrogen gas. The technology and apparatuses of the plasma-chemical installation are described, and the influence of the fractional composition of magnesium fluoride powder on the productivity of the plasma conversion process is considered. A method for making magnesium fluoride briquettes was developed to improve the efficiency of the plasma pyrolysis process. The completeness of the conversion process of magnesium fluoride to an oxide was evaluated using energy dispersive X-ray spectroscopy, scanning electron microscopy (SEM), and X-ray diffractometry. The proposed processing method allows for the production of pure magnesium oxide as a commercial product and the utilization of fluorine-containing industrial waste.
Article
Engineering, Environmental
Juan Qin, Yeting Fang, Changjin Ou, Junyue Wang, Fang Huang, Qian Wen, Zhipeng Liao, Jian Shi
Summary: A nanosized MgO modified TOB was fabricated for removing Cd2+ and Cu2+ from water, showing superior adsorption performance with equilibrium achieved within 30 and 60 minutes respectively. The modified TOB had theoretical adsorption capacities of 1428.57 mg/g for Cd2+ and 909.09 mg/g for Cu2+. The adsorption followed pseudo-second-order and Langmuir isotherm models, indicating chemical adsorption. The modified TOB efficiently removed contaminants even at a pH of 2.0.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
S. Astals, M. Martinez-Martorell, S. Huete-Hernandez, V. B. Aguilar-Pozo, J. Dosta, J. M. Chimenos
Summary: Our research successfully optimized the technology for recovering ammonia nitrogen from pig manure by using a stabilizing agent synthesized from LG-MgO and phosphoric acid. The experimental results showed that the H3PO4/LG-MgO ratio controlled the magnesium phosphate mineral phase of the stabilizing agent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Juan Yang, Xuqin Duan, Lingchuan Liu, Huifen Yang, Xiaocui Jiang
Summary: This study provides a technical approach for efficiently recovering magnesium from ferronickel slag to produce high-quality magnesium oxide using sulfuric acid leaching method under atmospheric pressure. The two-step acid leaching process was proposed to optimize the leaching rate, with temperature and acid leaching time identified as key parameters affecting magnesium leaching rate.
Article
Engineering, Environmental
Christine Edwards, Calum C. McNerney, Linda A. Lawton, Joseph Palmer, Kenneth Macgregor, Frances Jack, Peter Cockburn, Amy Plummer, Alison Lovegrove, Abigail Wood
Summary: This study explores the composition of the soluble fraction of pot ale from Scotch Whisky distilleries in Scotland, revealing its potential as a source of protein, lactic acid, and critical raw materials for a circular economy. The findings suggest that pot ale can contribute to sustainable energy, food, and platform chemicals, supporting the transition to a more environmentally friendly approach.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Metallurgy & Metallurgical Engineering
Hyeong-Jun Jeoung, Tae-Hyuk Lee, Jin-Young Lee, Kyung-Woo Yi, Jungshin Kang
Summary: This study developed a novel Mg production process to obtain high-purity Mg metal from dolomite. Electrolysis of calcined dolomite using a Cu cathode and C anode in MgF2-LiF molten salt at temperatures of 1083-1173 K resulted in a current efficiency of 66.4-88.6%. The produced Mg alloys consisted of MgCu2 and Cu (Mg) or MgCu2 and CuMg2 phases, depending on the Mg concentration in the alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Engineering, Chemical
Weiwei Chen, Jinghua Feng, Shuya Liu, Jing Zhang, Yawen Cai, Zhimin Lv, Ming Fang, Xiaoli Tan
Summary: A magnesium oxide/biochar (MgO/biochar) composite with excellent adsorption ability for U(VI) was synthesized using a simple method. The composite exhibited a wide pH range for adsorption and showed great potential for separating pollutants from the aquatic environment.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Behavioral Sciences
Noriyuki Miyaue, Madoka Kubo, Masahiro Nagai
Summary: Ascorbic acid can mitigate the degradation of carbidopa induced by MgO and may contribute to improving the bioavailability of levodopa in patients with PD.
BRAIN AND BEHAVIOR
(2022)
Article
Green & Sustainable Science & Technology
Hyeong-Jun Jeoung, Tae-Hyuk Lee, Jin-Young Lee, Kyung-Woo Yi, Jungshin Kang
Summary: A molten salt electrolysis process using an Ag cathode and vacuum distillation was investigated to produce high-purity Mg metal from MgO. The electrolysis of MgO was conducted at 1083-1163 K using an Ag cathode and a C anode in MgF2-LiF molten salt. After electrolysis, Mg-Ag alloys were produced with mass percentages of 8.53-21.5%, an average cell voltage between 1.95-2.11 V, and a current efficiency of 74.6-85.1%. Distilling the Mg alloys at 1300 K under vacuum resulted in Mg metal with a purity of 99.9998% under specific conditions. The developed Mg production process demonstrates the feasibility of environmentally friendly and efficient production of high-purity Mg metal from MgO through molten salt electrolysis using an Ag cathode, followed by vacuum distillation.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Article
Chemistry, Multidisciplinary
Svetlana A. Kulikova, Sergey E. Vinokurov, Ruslan K. Khamizov, Natal'ya S. Vlasovskikh, Kseniya Y. Belova, Rustam K. Dzhenloda, Magomet A. Konov, Boris F. Myasoedov
Summary: The study focuses on the synthesis of a magnesium potassium phosphate matrix for the immobilization of radioactive waste using magnesium oxide as a necessary binding agent. The research found a cost-effective approach to prepare the matrix and confirmed its necessary quality indicators for radioactive waste immobilization. Additionally, the high hydrolytic stability of the matrix was demonstrated through leaching rate analysis.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Environmental
Mohammadtaghi Vakili, Yixiang Bao, Fatemeh Gholami, Zahra Gholami, Shubo Deng, Wei Wang, Abhishek Kumar Awasthi, Mohd Rafatullah, Giovanni Cagnetta, Gang Yu
Summary: HFPO-DA and GenX are anthropogenic substances widely used in the industry, characterized by high chemical stability, high mobility, and high water solubility. Due to their persistence in the environment and adverse effects on human health, these chemicals are receiving increasing regulatory attention.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Quantong Jiang, Dongzhu Lu, Chang Liu, Nazhen Liu, Baorong Hou
Summary: The Pilling-Bedworth ratio of oxides preferentially formed from precipitated phases in magnesium alloys was calculated, showing different oxide compositions providing protection to the Mg matrix. Analysis of oxide films on surfaces of pure Mg and Mg-xY (x=3, 5, 7 wt.%) alloys at high temperatures revealed the presence of Y2O3 providing better corrosion resistance in the Mg-Y samples.
FRONTIERS IN MATERIALS
(2021)
Article
Electrochemistry
Hyeong-Jun Jeoung, Youngjae Kim, Tae-Hyuk Lee, Jin-Young Lee, Young Min Kim, Kyung-Woo Yi, Jungshin Kang
Summary: An environmentally friendly and effective molten salt electrolysis process using a copper (Cu) cathode was developed for producing magnesium (Mg) metal from magnesium oxide (MgO). The influence of various factors on the current efficiency was investigated, and the microstructure of the Al2O3 crucible containing Mg alloy was analyzed. The results demonstrate the feasibility of this novel electrolytic process for producing Mg metal.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
