Article
Engineering, Chemical
J. Valenzuela-Elgueta, A. V. Delgado, S. Ahualli
Summary: The study explores the use of dynamic electrophoretic mobility to indirectly evaluate the adsorption of CTAB on silica/kaolinite mixtures under specific conditions. The electroacoustic technique is found to be suitable for predicting the effect of surfactant addition on individual particles and mixtures. The research aims to identify optimal doses of surfactant for flocculating suspensions and separating them from the continuous phase in hydrometallurgy processes.
MINERALS ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Vladimir Losev, Evgeney Elsuf'ev, Elena Borodina, Olga Buyko, Natalya Maznyak, Anatoliy Trofimchuk
Summary: Silicas chemically modified with sulfur-containing groups were proposed for the separation and preconcentration of precious metals, showing good selectivity in extracting precious metals from hydrochloric acid solutions and separating them from other metals. The selectivity of separation was influenced by the nature of the sulfur atom within the functional group, with higher selectivity observed when transitioning from thione to thiol sulfur. The developed methods were confirmed to be correct through the analysis of certified reference materials.
Article
Chemistry, Physical
Tahereh Shojaeimehr, Michael Schwarze, Michelle Tupinamba Lima, Reinhard Schomaecker
Summary: This study investigates the effect of foaming properties of cationic and nonionic surfactants on the efficiency of silica particle removal by foam flotation technology. The results show a strong correlation between the foaming properties and foam flotation performance, which is controlled by the molecular structures of the surfactants. These correlations are important for selecting suitable surfactants for flotation of real contaminants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Nanoscience & Nanotechnology
Yaping Song, Qiang Sun, Jiangqi Luo, Yueqi Kong, Bolin Pan, Jing Zhao, Yue Wang, Chengzhong Yu
Summary: This study reports a dual active templating strategy for the design of nanostructured silica composites with inherent antibacterial performance. By using cationic and anionic structural directing agents as dual templates, controlled release of dual active antibacterial agents is achieved, resulting in enhanced antimicrobial properties of the composites.
NANO-MICRO LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Rui Peng, Muhammad Asadullah Khan, Jiao Wu, Zhen Chen
Summary: In-situ monitoring of microemulsion-based nanoparticle synthesis is crucial for understanding the effects of interfacial polarization and orientational polarization during the synthesis process. This study used dielectric spectroscopy to monitor the relaxation behavior of silica nanoparticles synthesized in a CTAB/n-hexanol/cyclohexane/ammonia microemulsion, and found significant changes in the lower-frequency relaxation with synthesis time.
Article
Chemistry, Analytical
Shuyang Li, Yanli Deng, Hongtao Zheng, Xing Liu, Peidong Tang, Jianwei Zhou, Zhenli Zhu
Summary: A new purification procedure for high precision Sb isotopic analysis was developed and applied successfully to determine the Sb isotope composition in natural water samples affected by mining activities. The method showed high recovery rate and low blank values, providing accurate measurement results for Sb isotopes. The study suggests that Sb isotopes may serve as a promising tool for researching antimony migration and pollution.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Review
Chemistry, Multidisciplinary
Fehmeeda Afzal, Sonia Tariq, Ashraf Nadeem, Samiullah, Jafar Iqbal, Khalil Hasni, Muhammad Aslam, Shaikh Sanaullah
Summary: Heavy metals, increasingly present in the environment due to human activities, pose a threat to aquatic organisms and human health. Atomic absorption spectroscopy is the preferred method for measuring heavy metal levels in Mugilcephalus fish, with μg/g being the commonly used unit for metal detection.
JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN
(2021)
Review
Food Science & Technology
Leina El Hosry, Nicolas Sok, Rosalie Richa, Layal Al Mashtoub, Philippe Cayot, Elias Bou-Maroun
Summary: Every human being needs around 20 essential elements to maintain proper physiological processes. Some trace elements are essential for the human body, while others have undetermined biological functions and are considered contaminants. Pollution with trace elements can affect biological functions and cause illnesses. This review provides an overview of commonly used methods and techniques in trace element analysis of food.
Article
Chemistry, Analytical
Liangcheng Zhao, Li Wei, Yanqiao Hu, Qingzhi Chen, Wencui Cheng, Jinming Zhang, Xing Li, Ziyi An, Jianwei Meng, Huajie Liu
Summary: This study established a method for rapid mass decomposition and multi-element analysis of graphite ore samples using molten lithium metaborate, which showed good accuracy and precision in verification results, and offered more advantages compared to traditional methods.
ANALYTICAL SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
V. A. Volchenkova, E. K. Kazenas, N. A. Andreeva, T. N. Penkina, S. K. Rodionova, V. B. Smirnova, A. A. Fomina, O. N. Fomina, I. Fadeeva, A. S. Fomin, M. A. Goldberg
Summary: This study developed a method for the express determination of impurity elements in medical materials based on calcium phosphate. The method utilizes ICP-AES and AAS, allowing for a wide range of concentrations without the need for preliminary separation or standard composition samples. The method provides reliable and accurate results and facilitates the research of antibacterial medical materials.
INORGANIC MATERIALS-APPLIED RESEARCH
(2022)
Article
Chemistry, Analytical
M. A. Morosanova, E. I. Morosanova
Summary: The study investigates the influence of CPC on the interaction between triphenylmethane dyes and silica-titania xerogels, observing the formation of colored complexes using solid phase spectrophotometry. A method for CPC determination using silica-titania xerogel - PV system is proposed, with application in treated waste water and working solutions of disinfectants. Recovery tests were used for procedure validation.
JOURNAL OF ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Applied
Ruby Thomas, Manickam Janarthanam Umapathy, Giridharan Ravi
Summary: Mild steel panels were treated with zinc phosphating using environmentally safe nano silica as an accelerator and a series of four cationic surfactants as additives. The alkyl chain length of the surfactant compounds affected the coating quality. Salt spray test, porosity test, adhesion test, and roughness test were carried out to evaluate the corrosion resistance and surface properties of the coated panels. The presence of C(16)TEAB additive showed the best performance in terms of coating efficiency, thickness, and corrosion inhibition. The optimal quantity of C(18)TEAB resulted in a maximum coating weight of 0.0430 g/mm(2), enhancing durability, appearance, and barrier qualities.
TENSIDE SURFACTANTS DETERGENTS
(2023)
Article
Metallurgy & Metallurgical Engineering
K. Petrova, V. V. Es'kina, V. B. Baranovskaya, M. S. Doronina, N. A. Korotkova, A. A. Arkhipenko
Summary: The efficiency of utilizing rare earth metals greatly depends on their impurity composition, which has an impact on the structure and properties of materials. Analyzing the impurities in rare earth-based materials is a difficult task due to spectral and matrix interferences, and therefore requires various separation/preconcentration procedures. This article reviews different preconcentration methods for analyzing materials containing rare earth elements (REEs) and highlights the advantages and limitations of each method.
RUSSIAN JOURNAL OF NON-FERROUS METALS
(2022)
