Article
Environmental Sciences
Grant B. Douglas, Ariane Ancel, Vincent Saille, Sebastien Lamontagne, Amiel Boullemant, Xavier Bourrat, Michael G. Trefry
Summary: Several years after decommissioning, a magnesium dross and mixed waste heap at a former industrial facility is still reactive, showing emissions of heat, VOCs, acetylene, cyanide, and ammonia. The waste heap consists of unreacted materials and hydrated secondary reaction products, with a CaO/MgO ratio serving as a useful proxy for temperature, pH, and gas concentrations. Measures such as capping and targeted venting are recommended to manage the environmental risk posed by the waste heap.
Article
Chemistry, Physical
Yuri Ito, Yuji Nakashima, Kenichi Okutsu, Motoyoshi Nakano, Fuminori Misaizu
Summary: The ultraviolet photodissociation processes of gas phase Mg+-NO complex were studied using both experiments and theoretical calculations. The experimental results showed the formation of Mg+ and NO+ ions, and the theoretical calculations explained the origin of these dissociation channels. The NO+ channel exhibited high anisotropy and a larger fraction of translational energy, while the Mg+ channel showed more isotropic angular distribution and less translational energy release.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Ivan Eliezer Romero-Ramirez, Alejandro Ramirez-Solis, Humberto Saint-Martin Posada
Summary: Recent low-temperature infrared-based experimental studies have investigated the effects of aqueous microsolvation on the intramolecular hydrogen bond of protonated glycine and beta-alanine. This study further examines the temperature-dependent entropic effects on the aqueous microsolvation patterns of these amino acids and proposes a new statistical Cumulative Percentage of Structures (CPS) scheme to analyze the data.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Construction & Building Technology
Weiwei Han, Huisu Chen, Xiangyu Li
Summary: Magnesium oxychloride cement (MOC) is widely used in various industrial applications. This study investigates the influence of temperature on the stable hydrate assemblage in MOC using thermodynamic modeling. The results show that temperature has little effect on the hydrate phase assemblage in MOC at lower temperatures, but at higher temperatures, there is a change in the phase composition.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Na Zhang, Hongfa Yu, Haiyan Ma, Mingfang Ba
Summary: This study investigated the effects of different pH chemical additives on the hydration and hardening rules of basic magnesium sulfate cement (BMSC) based on mechanical properties test and microstructure characterization. The results showed that chemical additives with acid pH value can delay the hydration reaction of BMSC, while additives with neutral and alkaline pH value can promote the hydration reaction. Therefore, the performance of BMSC can be controlled to a certain extent through the selection of chemical additives.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
N. T. Dung, C. Unluer
Summary: The hydration of reactive magnesia cement (RMC) was improved by using magnesium acetate (MA), hydromagnesite (H), and magnesite (M) as replacements. MA accelerated hydration and led to the formation of needle-like artinite, while the presence of M resulted in rosette-like crystals. The inclusion of M in the presence of MA enhanced the compressive strength of RMC samples by 240%.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Jie Shi, Jinguang Zhao, Heng Chen, Pengkun Hou, Shiho Kawashima, Jihui Qin, Xiangming Zhou, Jueshi Qian, Xin Cheng
Summary: The acid resistance performance of magnesium phosphate cements is of great importance and this study found that magnesium ammonium phosphate cement has better resistance to sulfuric acid than magnesium potassium phosphate cement.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Chemistry, Physical
Raffaello Mazzaro, Luca Pasquini
Summary: The aim of this study is to investigate the hydrogen sorption kinetics and thermodynamics of Mg-Ni nanoparticles at low temperature, focusing on their microstructure. The findings show that Mg-Ni nanoparticles exhibit fast hydrogen sorption kinetics at 150 degrees C, but the maximum hydrogen storage capacity is limited due to the lack of transformation from Mg2NiH0.3 to Mg2NiH4 at this temperature. Partial replacement of Ni with Fe does not significantly affect the hydrogen sorption thermodynamics and kinetics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Mauro Lorenzo Mugnai, D. Thirumalai
Summary: The release of phosphate in myosin VI is found to be through various gateways, preceded by stepwise hydration of the ADP-bound magnesium ion.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Construction & Building Technology
Yibo Jing, Yu Jiang, Bing Chen, Liyan Wang
Summary: This study investigated the influence of steel slag powder (SSP) as a substitute for magnesium oxide (MgO) on the hydration behavior, mechanical properties, phase composition, and microstructure of magnesium phosphate cement (MPC). The results showed that SSP did not form new crystal phases, but the activated part participated in the hydration process and generated amorphous phases. The addition of SSP improved the compactness and mechanical properties of the MPC by filling pores, patching cracks, and connecting unreacted particles with struvite. This study contributes to a better understanding of the effects of SSP in MPC and provides a recycling alternative for SSP.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Junxia Liu, Yimeng Yan, Zhongyu Li, Fei Yang, Ran Hai
Summary: Magnesium ammonium phosphate cement (MAPC) was improved in terms of water resistance, volume stability, and economy by modifying it with red mud pretreated with ammonium dihydrogen phosphate (NH4H2PO4). The effects of pretreated red mud on different properties of MAPC were investigated, and the mechanism behind these effects was clarified. The experimental results showed that the water resistance of MAPC was significantly improved, and the mechanical properties, hydration peak temperature, and hydration heat were also affected by the pretreated red mud content.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Junxia Liu, Yimeng Yan, Zhongyu Li, Fei Yang, Ran Hai, Mengtian Yuan
Summary: Potassium magnesium phosphate cement (MKPC) was modified with red mud pretreated with potassium dihydrogen phosphate (KH2PO4) to enhance its water resistance, volume stability, and economy. The effects of pretreated red mud on the properties of MKPC such as fluidity, setting time, mechanical properties, water resistance, and hydration heat were investigated. The results showed that the water resistance of MKPC was significantly improved with the increase of pretreated red mud content, while the peak temperature and hydration heat were reduced. The involvement of pretreated red mud refined the crystal structure of MgKPO4·6H2O and reduced the concentration of dead burned magnesium oxide (MgO) and KH2PO4 in MKPC mixture.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Xiaoyang Chen, Bing Chen, Jun Chang, Xingxing Xu, Enyu Sun, Shaoyan Wang, Yan Guan
Summary: This research investigated the impact of ferric sulfate addition on the mechanical strength of magnesium oxysulfate (MOS) cement. Variations in fluidity, setting time, hydration reaction, volume stability, water resistance, phase composition, and microstructure of MOS cement were reported. The results show that the addition of ferric sulfate improved the mechanical strength and water resistance of MOS cement by accelerating the dissolution of MgO and promoting the growth of certain components.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Chemistry, Physical
Tao Song, Fengfeng Gao, Xiao Du, Xiaogang Hao, Zhong Liu
Summary: Magnesium oxide (MgO) was prepared by precipitation, hydrothermal, and calcination to remove boron from aqueous solution. The adsorption mechanism of MgO on boron was analyzed, and it was found that MgO had a high adsorption capacity and showed good resistance to interference ions. The results suggest that MgO has the potential to be a low-cost boron adsorbent with high efficiency and renewability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Construction & Building Technology
Guangxiang Ji, Xiaoqin Peng, Shuping Wang, Can Hu, Peng Ran, Keke Sun, Lu Zeng
Summary: Magnesium slag, a byproduct of the magnesium industry, has the potential as a mineral admixture in cement concrete, with improved fluidity and later strength development. Despite its retarding effect on early strength, it can optimize the long-term properties of concrete. An optimum content of 30% and a specific surface area of 485 m(2)/kg are suggested for its use in concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Biochemical Research Methods
Magdalena Franska, Anna Michalak, Lukasz Lawniczak
JOURNAL OF MASS SPECTROMETRY
(2020)
Article
Environmental Sciences
Anna Parus, Jan Homa, Dariusz Radonski, Grzegorz Framski, Marta Wozniak- Karczewska, Anna Syguda, Lukasz Lawniczak, Lukasz Chrzanowski
Summary: This research focuses on transforming herbicides into herbicidal ionic liquids to reduce volatility and improve effectiveness. The novel HILs show satisfactory solubility and high activity in controlling weeds, but further studies are needed to improve biodegradability and evaluate commercial applications.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Environmental Sciences
Malgorzata Drzewiecka, Monika Beszterda, Magdalena Franska, Rafal Franski
Summary: The study focuses on the biodegradation of bisphenol A in environmental waters, with the biodegradation products identified as either 2,2-bis(4-hydroxyphenyl)-1-propanol or p-hydroxyacetophenone. It was found that 2,2-bis(4-hydroxyphenyl)-1-propanol was more commonly formed than p-hydroxyacetophenone, and that the former persisted in the fortified environmental waters while the latter was further mineralized.
Article
Chemistry, Physical
Monika Beszterda, Malgorzata Kasperkowiak, Magdalena Franska, Sandra Jeziolowska, Rafal Franski
Summary: The ethoxylated butoxyethanol-bisphenol A diglycidyl ether adducts were identified in the acetonitrile extracts of can-coating materials, a previously undetected compound in epoxy resin can-coatings.
Article
Construction & Building Technology
Izabela Klapiszewska, Anna Parus, Lukasz Lawniczak, Teofil Jesionowski, Lukasz Klapiszewski, Agnieszka Slosarczyk
Summary: In this study, inorganic-organic systems based on ZnO or ZnO-SiO2 and lignin were used for the first time to counteract the biodeterioration of cement composites. The systems showed good stability and lignin was able to be uniformly dispersed in the cement matrix. Zinc oxide was found to retard the hydration of the cement binder and inhibit bacterial and fungal pathogens, with silica balancing out the adverse effects to some extent.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Chemistry, Physical
Patryk Jedrzejczak, Lukasz Lawniczak, Agnieszka Slosarczyk, Lukasz Klapiszewski
Summary: In recent years, there has been increasing attention to the durability of building materials, especially those based on cementitious binders. This study investigated the use of zinc, titanium, and copper oxides as nanoadditives in cement mortars to enhance their strength and resistance to external factors. The research found that while all nanoadditives initially worsened the mechanical parameters of the mortars, zinc and titanium oxides showed improvement after 28 days. Copper oxide exhibited the best antibacterial activity among the tested oxide systems. The study established the order of microbial susceptibility to inhibition of growth on cement mortars.
Editorial Material
Engineering, Chemical
Magdalena Franska
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemical Research Methods
Magdalena Franska, Olga Stezycka, Wojciech Jankowski, Marcin Hoffmann
Summary: The gas-phase decompositions of magnesium complexes with ATP and ADP were studied, and a strong phosphate-Mg-adenine interaction was observed. This interaction may also be important for biological processes.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2022)
Review
Engineering, Environmental
Anna Parus, Tomasz Ciesielski, Marta Wozniak-Karczewska, Mariusz Slachcinski, Mikolaj Owsianiak, Lukasz Lawniczak, Andreas P. Loibner, Hermann J. Heipieper, Lukasz Chrzanowski
Summary: This article explores key issues regarding the use of rhamnolipids in the treatment of heavy metal and petroleum hydrocarbon-contaminated soils, including concentration, phytotoxicity, biodegradation, and interaction with soil microorganisms.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Olga Stezycka, Magdalena Franska, Monika Beszterda-Buszczak
Summary: The interaction between soy-based food supplements for menopausal symptoms and nucleic acids has been studied to understand its potential impact on cancer therapy. By using ESI-CID-MS and survival yields method, the strength of the interaction between isoflavone glucosides and G-tetrads was analyzed. The results showed that the interaction between glycitin and [4G+Na](+) ions was the strongest, indicating its potential role in cancer prevention.
Article
Materials Science, Multidisciplinary
Izabela Klapiszewska, Lukasz Lawniczak, Sebastian Balicki, Bartosz Gapinski, Michal Wieczorowski, Kazimiera A. Wilk, Teofil Jesionowski, Lukasz Klapiszewski, Agnieszka Slosarczyk
Summary: One of the key considerations in shaping the antibacterial properties of nano-mixed cementitious composites is the proper dispersion of zinc oxide nanoparticles in the cement matrix. This study utilized a two-stage modification process, involving both dry mixing and the addition of a superplasticizer, to achieve better dispersion of zinc oxide in the cement matrix. The results showed that combining mechanical and ultrasonic mixing resulted in the most homogeneous mixture, while composites obtained solely through mechanical mixing exhibited better antimicrobial properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Letter
Chemistry, Applied
Olga Stezycka, Magdalena Franska
