Article
Geochemistry & Geophysics
Huaiyan Zhao, Xionghan Feng, Sungsik Lee, Benjamin Reinhart, Evert J. Elzinga
Summary: This study investigated the sorption of aqueous Mn(II) and Co(II) onto hexagonal birnessite under anoxic conditions. The results showed that the co-sorption of Mn(II) and Co(II) led to reduced sorption rates and extent. The presence of Mn(II) affected the transformation of birnessite and the speciation of Co(II). These findings indicate the significant impact of aqueous Mn(II) on the reactivity and solubility of Co(II) in geochemical environments.
Article
Chemistry, Analytical
O. Yu. Lonin, V. V. Levenets, O. P. Omelnik, A. O. Shchur
Summary: The study investigated the influence of zeolite activation temperature on the sorption of a mixture of remove radionuclides Cs, Sr, Co, and found that activation at 150 degrees C was the most effective, leading to decreased Cs sorption, increased Sr sorption, and increased Co sorption.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Engineering, Environmental
Anna Yu. Romanchuk, Tatiana V. Plakhova, Anastasiia D. Konyukhova, Anastasiia Smirnova, Daniil A. Kozlov, Daniil A. Novichkov, Alexander L. Trigub, Stepan N. Kalmykov
Summary: The sorption behavior of Ce(III) on three common environmental minerals (goethite, anatase, and birnessite) was studied. Batch sorption experiments using a radioactive 139Ce tracer were conducted to examine the key characteristics of the sorption process. Different sorption kinetics and changes in oxidation states were observed for the sorption of Ce(III) on birnessite compared to the other minerals.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Natalya V. Efimova, Alla P. Krasnopyorova, Galina D. Yuhno, Dmitry S. Sofronov, Miroslaw Rucki
Summary: The investigation results show that the uptake efficiency of radionuclides Co-60, Sr-90, and Cs-137 on iron oxides varies with pH values, with Fe3O4 exhibiting the highest sorption ability towards Co-60. Sorption efficiency was found to be affected by the interfering presence of magnesium and calcium cations in drinking water.
Article
Environmental Sciences
Natarajan Rajamohan, Subrajit Bosu, Manivasagan Rajasimman, Sunita Varjani
Summary: In this research, a novel nano sorbent IL-MCNT was used to remove Selenium from aqueous media. The optimal operating conditions were determined as pH 2.0, 100 mg/L of IL-MCNT dosage, 308 K temperature, 45 min of contact time, and 110 g of IL-MCNT dosage. The Langmuir isotherm and pseudo-second-order model were found to fit the experimental data well.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Fangfei Cai, Funing Ma, Xiaoying Zhang, Paul Reimus, Linlin Qi, Yu Wang, Di Lu, Hung Vo Thanh, Zhenxue Dai
Summary: This study investigated the sorption characteristics of strontium (Sr) on granite, as well as the coexistence system of granite and colloids under various hydrogeochemical conditions. The results showed that the concentration of bentonite colloids significantly affected Sr sorption, while pH and ionic strength played crucial roles in the process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Youngho Sihn, Hee-Man Yang, Chan Woo Park, In-Ho Yoon, Ilgook Kim
Summary: By modifying the ion-exchange affinity of nano-Hydroxyapatite (Ca-5(PO4)(3)OH, HAP) surface, we achieved rapid and selective adsorption of Sr-90 from groundwater. The modified HAP, Mg-HAP, showed the highest removal efficiency for Sr2+, attributed to the higher ion-exchange affinity of substituted Mg2+. The proposed modification method can improve the deployment of an in situ remediation technology for Sr-90 contaminated groundwater.
Article
Chemistry, Analytical
M. Ghaly, S. S. Metwally, E. A. El-Sherief, E. A. Saad, R. O. Abdel Rahman
Summary: The study confirmed the feasibility of using nano-cryptomelane for the elimination of cobalt and cesium metal ions, with characterization showing a tunnel structure and particle size range. Batch experiments were conducted to determine the kinetic and equilibrium performance of the removal process, with Langmuir isotherm model found to be more fitting than Freundlich model for the equilibrium studies.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Quanzhi Tian, Yinhai Pan, Yingchu Bai, Keiko Sasaki
Summary: The study investigated the immobilization of Sr2+ in geopolymers activated by different concentrations of sodium silicate, revealing that the adsorption amount of Sr2+ decreased with higher concentration of sodium silicate. The sorption process was mainly governed by film diffusion, with the diffusion mode shifting towards particle diffusion at higher sodium silicate concentration. Additionally, the Langmuir model was found to be more suitable for sorption data, and more Al tetrahedrons were formed under higher sodium silicate concentration, impacting the sorption process of Sr2+.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
Takanari Koike, Yuta Hikima, Yosuke Muranaka, Taisuke Maki, Masahiro Ohshima
Summary: This study aims to verify the mechanisms of water sorption and hydrolysis reactions in biodegradable polymers and construct a model. By using spectroscopic techniques and chromatographic analysis, we can predict and control the degradation process of these polymers.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Multidisciplinary Sciences
Yangyang Li, Yuqiang Li, Hongjin Shi, Hong Wei, Haoyang Li, Ignacio Funes-Ardoiz, Guoyin Yin
Summary: In this study, we present a reliable and modular synthesis strategy for the excellent kinetic stereocontrol of disubstituted cyclohexanes from readily accessible substituted methylenecyclohexanes. By introducing a sterically demanding boron ester group adjacent to the cyclohexane, the stereochemical outcome can be guided. The synthetic potential of this method has been demonstrated in late-stage modification of complex bioactive molecules and compared with current cross-coupling techniques.
Article
Engineering, Environmental
Jiangbo Huo, Guoce Yu, Jianlong Wang
Summary: By preparing a composite of polyvinyl alcohol, graphene oxide, and MnO2, the adsorbent showed enhanced adsorption capacity for Co2+ and Sr2+. The composite exhibited high adsorption capacity under different pH conditions and different responses to interfering substances in competitive adsorption tests.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Geochemistry & Geophysics
Yulia Izosimova, Irina Gurova, Inna Tolpeshta, Michail Karpukhin, Sergey Zakusin, Olga Zakusina, Alexey Samburskiy, Victoria Krupskaya
Summary: This paper investigates the adsorption regularities and mechanisms of nonradioactive Cs(I) and Sr(II) analogs on bentonites with different chemical and mineral composition. The main mechanism is ion exchange, leading to the formation of outer-sphere complexes and, at higher pH values, inner-sphere complexes. Bentonite T exhibits higher adsorption capacity compared to other bentonites.
Article
Chemistry, Analytical
E. A. A. El-Shazly, G. A. Dakroury, H. H. Someda
Summary: TiO2 is supported on silica gel surface in a 1:1.329 mole ratio to form the TiO2(0.5)/SiO2(0.5) composite, which is characterized by physico-chemical techniques and used as a sorbent for Cs-134 and Co-60 radionuclides. The composite shows saturation sorption capacities of 33.1 and 17.7 mg g(-1) for Cs-134 at pH 9.5 and Co-60 at pH 5.5, respectively, with an adsorption mechanism following the Freundlich isotherm. The process is found to be spontaneous and favorable.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Engineering, Environmental
Peng Yang, Ke Wen, Kevin A. Beyer, Wenqian Xu, Qian Wang, Dong Ma, Juan Wu, Mengqiang Zhu
Summary: The presence of phosphate or silicate significantly decreases the rate and extent of reductive transformation of layered manganese oxides, likely due to the interference of oxyanions with electron transfer and structural rearrangements. Oxyanions also reduce the crystallinity and particle sizes of the transformation products, preventing further particle growth. This study enhances our understanding of how solution chemistry controls the redox-driven transformation of Mn oxides.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Sayed S. Metwally, Eman A. El-Sherief, Hameda S. Mekhamer
SEPARATION SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Analytical
M. F. Attallah, S. S. Metwally, S. Moussa, Mohamed A. Soliman
MICROCHEMICAL JOURNAL
(2019)
Article
Engineering, Environmental
Mostafa M. Hamed, Reham S. Hassan, Sayed S. Metwally
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2019)
Article
Chemistry, Multidisciplinary
Sayed S. Metwally, Hameda S. Mekhamer, Eman A. El-Sherief
SEPARATION SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Physical
S. S. Metwally, M. F. Attallah
JOURNAL OF MOLECULAR LIQUIDS
(2019)
Article
Chemistry, Physical
S. S. Metwally, H. S. Hassan, N. M. Samy
JOURNAL OF MOLECULAR LIQUIDS
(2019)
Article
Engineering, Chemical
Ismail M. Ahmed, Mostafa M. Hamed, Sayed S. Metwally
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2020)
Article
Environmental Sciences
Amira A. Mohammed, Ola A. Moamen, Sayed S. Metwally, Ahmed M. El-Kamash, Ibrahim Ashour, Mohammed S. Al-Geundi
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Biochemical Research Methods
H. A. Ibrahim, S. S. Metwally, W. R. Mohamed, E. A. El-Sherief, H. S. Mekhamer, Islam M. I. Moustafa, E. M. Mabrouk
Summary: The application of fixed bed column for separation of gadolinium and neodymium ions from their aqueous solutions using Cyphos IL-104 impregnated silica was investigated. The breakthrough time was found to decrease with increasing flow rate and initial concentration, while the column capacity increased with greater bed depth.
Article
Metallurgy & Metallurgical Engineering
Walaa R. Mohamed, Nesreen M. Sami, Sayed S. Metwally, E. A. Saad
Summary: Surface modification of ball clay using gamma irradiation and chemical treatment resulted in the production of a composite sorbent with enhanced sorption capacity for gadolinium and cerium ions. The sorption mechanism was identified as ion exchange. The sorption kinetics and equilibrium isotherm followed the pseudo-second-order and Langmuir models, respectively. The composite sorbent demonstrated much higher sorption capacity compared to other sorbents in the literature. The best eluent for desorption was determined to be 0.1 M HNO3. Overall, the BC-AA-PA composite sorbent is recommended for lanthanide sorption from the liquid phase.
Article
Biochemistry & Molecular Biology
Lamis A. Attia, Nesreen M. Sami, Hisham S. Hassan, Sayed S. Metwally
Summary: The purification of wastewater using fixed-bed columns is efficient for removing hazardous pollutants, with a focus on zinc and cadmium removal in this study utilizing zirconia-silicate composite material. The study revealed that at optimal conditions, the removal rates were 80.3% and 79.3% for Zn2+ and Cd2+ respectively. Thomas theory showed the highest R-2 values and accurate computation of the adsorption process.
CHEMISTRY AND ECOLOGY
(2022)
Article
Chemistry, Analytical
M. Ghaly, S. S. Metwally, E. A. El-Sherief, E. A. Saad, R. O. Abdel Rahman
Summary: The study confirmed the feasibility of using nano-cryptomelane for the elimination of cobalt and cesium metal ions, with characterization showing a tunnel structure and particle size range. Batch experiments were conducted to determine the kinetic and equilibrium performance of the removal process, with Langmuir isotherm model found to be more fitting than Freundlich model for the equilibrium studies.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Nesreen M. Sami, A. A. Elsayed, M. M. S. Ali, Sayed S. Metwally
Summary: The scientific impact of this work lies in the protection of the environment from hazardous pollutants using a column technique. Ni-alginate has been found to be a stable and efficient sorbent for removing lead ions, making it recommended for selective removal of Pb2+ from waste solutions. The breakthrough curves and modeling analysis further support the effectiveness of Ni-alginate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Analytical
Sayed S. Metwally, Ahmed M. Shahr El-Din, Mostafa M. Hamed
Summary: Cesium, strontium, and iodine radionuclides can contaminate water through accidents or leaks, making it necessary to develop an economical and effective method for their removal. This study found that granular activated carbon obtained from discarded household water filters can effectively adsorb Cs-137, Sr-85, and I-131 radionuclides, making it a promising material for decontaminating environmental water.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Environmental Sciences
Eman H. El-Masry, Tarek M. Mohamed, Sayed S. Metwally
Summary: This work explores the use of a new composite polymer material for the removal of Nd(III) and Co(II) from aqueous solutions. The results show that the material has high sorption efficiency and capacity, making it a promising candidate for environmental protection against hazardous pollutants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Madeeha Riaz, Manahil Najam, Hina Imtiaz, Farooq Bashir, Tousif Hussain
Summary: This study focuses on the structural and biological analysis of Zn-Cu based biodegradable alloys for orthopedic applications. The results indicate that the alloys have good electrical conductivity and biocompatibility, with potential for promoting bone growth and healing process. Additionally, the alloys exhibit a low corrosion rate and improved corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rijo Rajeev, Sk Safikul Islam, Anitha Varghese, Gurumurthy Hegde, Suryasarathi Bose
Summary: In this study, a facile and selective electrochemical sensor was developed for the sensing of guanosine. The sensor utilized a unique porous structure and ordered framework, enabling linear detection of guanosine concentration in the range of 0.123-720 μM under specific conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rafael V. M. Freire, Dominique Celeste de A. Dias, Jose Yago Rodrigues Silva, Dayane Kelly Dias do Nascimento Santos, Larissa T. Jesus, Ricardo O. Freire, Severino A. Junior
Summary: This study reports the extraction and isolation of euphol from nature, its adsorption in nanosized ZIF-8, and the efficacy of this system against cancer cells. Experimental and simulation results show that ZIF-8 can enhance the effectiveness of euphol against cancer cells and selectively target cancer cells.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Manal A. Awad, Awatif A. Hendi, Maha M. Almoneef, Maymunah Alwehaibi, Khalid M. Ortashi, Wadha Alenazi, Fatimah S. Alfaifi, Shareefa Alahmariye, Asma Alangery, Warda Ali Alghoubiri, Haia Aldosari
Summary: In this study, magnesium-doped zinc oxide nanoparticles were synthesized and characterized. The research findings show that magnesium doping can alter the crystal structure and optical properties of zinc oxide, while enhancing its dielectric constant.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
F. J. Willars-Rodriguez, I. R. Chaverz-Urbiola, M. A. Hernandez-Landaverde, A. Zavala-Franco, E. A. Chavez-Urbiola, P. Vorobiev, Yu V. Vorobiev
Summary: This study focuses on manganese doped CdS thin films synthesized by chemical bath deposition. The incorporation of Mn2+ cations in CdS was found to influence the crystalline structure, morphology, and optoelectronic properties. Doped thin films exhibited a uniform hexagonal structure, changed growth orientation, and showed scale-like and needle-like morphologies. The bandgap and rectification speed of Schottky diodes were modified by introducing manganese. This study suggests the potential for affordable high-speed optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Mehdi Javidi, Hooman Karimi Abadeh, Fatemeh Namazi, Hamid Reza Yazdanpanah, Narjes Shirvani Shiri
Summary: This study investigated the synergistic effect of temperature, solution velocity, and sulphuric acid concentration on the corrosion behavior of carbon steel using response surface methodology. The results showed that temperature affected anodic reactions, solution velocity influenced cathodic reactions, and acid concentration altered the corrosion mechanisms by changing the properties of the surface layer.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
R. Sakthivel, Thirumoorthy Kulandaivel, Kirankumar Venkatesan Savunthari, K. Mohanraj, Hans-Uwe Dahms, Aswin kumar Anbalagan, Manjunath Rangasamy, Kien-Voon Kong
Summary: In this study, saturated fatty acids were incorporated with silane to modify viscose fabric, resulting in superhydrophobic and superoleophilic properties. The modified fabric showed excellent separation efficiency for oil and organic solvents, with high absorption capacity. The modified fabric also exhibited durability and retained its properties in harsh conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Wei Zhang, Hong Lei, Wenqing Liu, Zefang Zhang, Yi Chen, Xiaogang Hu, Xiangshan Ye
Summary: In this study, EDTA-grafted alumina composite abrasives were produced by a two-step process for the CMP of sapphire substrates. Experimental results showed that the modified abrasives exhibited better dispersion properties and significantly improved polishing efficiency, with higher material removal rates and lower surface roughness. The combination of chemical reaction and mechanical action enhanced the CMP performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Shumaila Rafaqat, Bushra Perveen, Warda Raqba, Warda Imran, Arshad Hussain, Naeem Ali
Summary: This study developed a MnP-based biosensor for quantitative measurement of dye concentrations using electrochemical signals. The effects of two different dyes on MnP activity were investigated, with one dye showing inhibitory effects and the other dye having no effect. The study demonstrates the potential application of enzyme-based biosensors in dye detection and toxicological monitoring.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinyan Shi, Oguzhan Yavuz Bayraktar, Baris Bayrak, Burak Bodur, Ali Oz, Gokhan Kaplan, Abdulkadir Cuneyt Aydin
Summary: The elemental composition of precursors is crucial for the performance development of geopolymers. The use of lime instead of metakaolin increases the fluidity and mechanical properties of geopolymers, while the addition of gypsum decreases them. Furthermore, higher lime content exacerbates the negative effect of gypsum.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aayush Gupta, Kaveri Ajravat, Loveleen K. Brar, O. P. Pandey, Pandey Rajagopalan
Summary: This study focuses on the performance of Mn3O4-ZnO composite material in wastewater treatment and energy storage applications, and presents a detailed comparative analysis. Results show that the composite material with equal concentrations of Mn3O4 and ZnO exhibits excellent photocatalytic activity and high capacitance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
V. Murugabalaji, Matruprasad Rout, Harsh Soni, Biranchi Narayan Sahoo
Summary: This study focuses on the corrosion characteristics of AA 7075 and AA 7075 based hybrid composite fabricated using stir casting and hot rolling techniques. The results show that the hybrid composite produced by hot cross rolling exhibits better corrosion resistance compared to the base metal. The addition of a small amount of graphite improves the bonding between the matrix and reinforcements, and the hot cross rolling enhances this bonding, leading to the formation of a strong passivation oxide layer and increased charge transfer resistance, thereby improving corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Fangkun Ning, Qinghao Shi, Shuping Kong, Weitao Jia, Lifeng Ma
Summary: The paper investigates a new method of rolling sheets with variable chamfering amounts in both the transversal and normal directions. The feasibility of the technological process was tested through simulation and compared with experimental results. Three important process parameters, temperature, stress, and flow velocity, were used to evaluate the effects on chamfering amount before determining the optimal angle. The spread formula for evaluating the shape quality of the plate after ECR was obtained through testing and theory.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aqeel Abbas, M. A. Hussein, Mohamed Javid
Summary: In this study, the AM60 magnesium alloy was processed using high-energy ball milling, and the results showed that different reinforcement agents had certain effects on particle size, crystallite size, lattice strain, and dislocation density.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
D. S. Mahmoud, E. M. Eldesouki, W. M. Abd El-Gawad
Summary: The development of flexible and lightweight microwave-absorbing materials has become a trendy topic. This study focuses on enhancing the microwave-absorbing performance of butadiene-acrylonitrile rubber (NBR) by incorporating novel reinforcing nanofillers. The results show that the NBR nanocomposite with a loading of 16 parts per hundred rubber (phr) of LiFe 20%/Si has the best microwave-absorbing performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
