Article
Metallurgy & Metallurgical Engineering
Vladimir Rychkov, Vladimir Baulin, Evgeny Kirillov, Sergey Kirillov, Grigory Bunkov, Denis Smyshlyaev, Maxim Botalov, Vladimir Semenishchev, Andrey Malyshev, Aslanbek Taukin, Alina Yuldashbaeva, Egor Gaidashov
Summary: A series of extraction chromatographic resins containing various phosphorus-containing and DGA-based extractants and ionic liquids were synthesized and studied for their sorption characteristics for rare earth elements (REE) in sulfate solutions. The study found that the resin capacity for REE in sulfuric acid solutions was not affected by the matrix type, and the acidity of the aqueous phase played a significant role in lanthanides sorption from sulfate solutions.
Article
Chemistry, Multidisciplinary
Ashleigh Kimberlin, Kenneth L. Nash
Summary: The aggregation state of extractant molecules is crucial in characterizing solvent extraction systems in hydrometallurgy. This study investigated the dimerization of HEH[EHP] in dodecane and toluene using NMR-based methods and found that chemical shifts and DOSY are effective techniques for studying such interactions.
SOLVENT EXTRACTION AND ION EXCHANGE
(2021)
Article
Engineering, Chemical
Xue Dong, Qiang Yan, Zhipeng Wang, Xiaogui Feng, Jing Chen, Chao Xu
Summary: In this study, a strategy for the separation of actinides from lanthanides by oxidizing actinides to hexavalent oxidation states and selectively extracting them using a sterically hindered ligand, 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (EHEHPA), was proposed. The results demonstrate the high efficiency of this method for the separation of actinides from lanthanides.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Review
Environmental Sciences
Luis Daniel Martinez-Razo, Alejandra Martinez-Ibarra, Edgar Ricardo Vazquez-Martinez, Marco Cerbon
Summary: DEHP, considered an endocrine disruptor chemical (EDC), is widely used in the plastic industry and can have negative effects on placental development and function, potentially impacting fetal growth. Research indicates that DEHP and MEHP can impair key processes in placental development and affect various placental functions. Clinical evidence also supports the connection between DEHP exposure and adverse pregnancy outcomes and pathologies.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Laurence Whitty-Leveille, Jean-Christophe Tremblay-Cantin, Audrey Picard-Lafond, Denis Boudreau, Nicolas Reynier, Dominic Lariviere
Summary: Core-shell magnetic nanoparticles functionalized with a Schiff base ligand were synthesized for uranium extraction, showing high adsorption capacity and selectivity, while also demonstrating strong reusability.
Article
Chemistry, Multidisciplinary
Mohamed H. Ismael, Hesham S. Mohammed, Omneya M. El Hussaini, Mohamed F. El-Shahat
Summary: This study developed a recycling process to recover titanium from uranium processing mine tailings, using solvent extraction and electrochemical deposition techniques to prepare pure TiO2 powders. The research found that solvent extraction and electrodeposition processes can effectively recover titanium, with the formation of TiO2 nanoparticles confirmed through various analytical techniques.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Ahmed R. Bakry
Summary: Aniline and polyaniline were successfully impregnated into Chinese D263B resin to enhance the removal of U(VI) from Abu El Toyour leach liquor. The impregnated D263B/polyaniline exhibited high U(VI) adsorption capacity and followed pseudo-second order kinetic model. The thermodynamic evaluation showed that the adsorption process was exothermic, random, and non-spontaneous. Elution of U(VI) from loaded D263B/polyaniline was achieved using NaCl/H2SO4 solution. The optimized factors were successfully applied for enhanced U(VI) removal.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Hyunki Cho, Yohan Seol, Seungyun Baik, Baeckkyoung Sung, Chang Seon Ryu, Young Jun Kim
Summary: The effects of MEHP exposure on Daphnia magna were investigated, revealing that MEHP exposure increased lipid droplet numbers and the reproduction rate of adult female daphnids. Furthermore, MEHP exposure enhanced lipid metabolism and altered the expression levels of ecdysone receptor and vitellogenin.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Energy & Fuels
Li Liu
Summary: This study introduces the application of the rotor-stator spinning disc reactor (RSSDR) in the extraction process, and establishes a theoretical model to simulate the extraction performance of chromium (III). The model predicts the effects of rotational speed, liquid flow rate and rotor-stator distance on extraction efficiency, and analyzes the contribution ratios of different parameters in detail after verification with experimental results.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Environmental Sciences
Lawrence P. Burkhard, Tylor J. Lahren, Terry L. Highland, James R. Hockett, David R. Mount, Teresa J. Norberg-King
Summary: The study found that the brominated flame retardant TBPH and its potential biotransformation product TBMEHP exhibit different bioaccumulation behaviors in aquatic species, with TBPH being rapidly eliminated in a short period of time, while there was little evidence of biotransformation of either chemical in the aquatic species.
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2021)
Article
Environmental Sciences
Yijie Chen, Zhen Zhen, Gaoyang Li, Huijun Li, Ting Wei, Fengcheng Huang, Tao Li, Changhong Yang, Lei Ren, Yanqiu Liang, Zhong Lin, Dayi Zhang
Summary: In this study, the degradation behavior of di-2-ethylhexyl phthalate (DEHP) in mangrove rhizosphere was investigated. The results showed that the rhizosphere could accelerate DEHP degradation by altering sediment physicochemical properties and microbial composition, which highlights its positive effects on coastal ecosystem services.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Immunology
Chun-Yu Lin, Chung-Hao Huang, Wen-Hung Wang, Jyrki Tenhunen, Ling-Chien Hung, Chi-Chou Lin, Yu-Cheng Chen, Yen-Hsu Chen, Wei-Ting Liao
Summary: Exposure to DEHP was associated with gastrointestinal bleeding in DV-infected patients, while MEHP treatment led to changes in macrophage immune responses and DV viral load. The study revealed a negative correlation between urine sigma DEHP levels and serum IL-23 levels in patients, highlighting the potential impact of environmental hormones on dengue disease outcomes.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Chemistry, Analytical
Yan-Ling Li, Jing-Lu Han, Wu-Ping Liao
Summary: The performance of the extractant is crucial for rare earth extraction and separation. Using (2-ethylhexylamino)methyl phosphonic acid mono-2-ethylhexyl ester (HEHAMP) as the extractant, rare earths (III) were successfully extracted and separated in nitrate medium. HEHAMP showed higher performance in separating heavy rare earths compared to sulfate and chloride solutions. The extraction mechanism involved cation exchange and the loaded organic phase could be easily stripped by hydrochloric acid.
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
(2023)
Article
Metallurgy & Metallurgical Engineering
Luyan Chen, Bicheng Deng, Shengting Kuang, Wuping Liao
Summary: In this study, a novel extractant HA was synthesized and used for the extraction and separation of HREs. The results showed that HA has higher separation factors and follows cation exchange mechanism for the extraction of REs. HA exhibits high loading capacities and good solvent extraction performance.
Article
Environmental Sciences
Yiyun Liu, Wen-Bo Huo, Jiao-Yun Deng, Qi-Ping Tang, Jin-Xia Wang, Yan-Ling Liao, Dongzhi Gou, De-Sheng Pei
Summary: This study reveals the neurotoxicity of MEHP on zebrafish embryos and larvae, and investigates the potential molecular mechanisms. MEHP has been found to impede growth and affect gene expression related to neurodevelopment. The study also shows that MEHP induces oxidative stress, brain cell apoptosis, and abnormal neural behavior, with potential involvement of the immune system and inflammation pathways.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Environmental Sciences
A. V. Voronina, A. Yu Noskova, V. S. Semenishchev, D. K. Gupta
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2020)
Article
Chemistry, Inorganic & Nuclear
Igor Voinov, Viktor P. Remez, Alexey A. Ioshin, Vladimir S. Semenishchev, Dmitry A. Gorchakov
Article
Chemistry, Inorganic & Nuclear
Vladimir S. Semenishchev, Tatiana A. Nedobukh, Anna V. Voronina, Irina Kirichenko, Andrey S. Malyshev, Evgenii Kirillov
APPLIED RADIATION AND ISOTOPES
(2020)
Article
Chemistry, Analytical
Vladimir S. Semenishchev, Lyubov A. Tomashova, Svetlana M. Titova
Summary: The study focuses on the sorption of radium-223 and polonium-210 on a thin-layer MnO2-CTA sorbent. The results show a high sorption efficiency for both radium and polonium, with observed changes in the alpha spectrum quality during the sorption process. The different behaviors of radium and polonium in terms of alpha peak width suggest potential differences in sorption mechanisms and diffusion processes.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Metallurgy & Metallurgical Engineering
Vladimir Rychkov, Maxim Botalov, Evgeny Kirillov, Sergey Kirillov, Vladimir Semenishchev, Grigory Bunkov, Denis Smyshlyaev
Summary: Bauxite residue is a promising source of scandium, with nearly 150 tons of this trace metal appearing annually in waste dumps in the aluminum plants of the Ural region, Russia. A method of red mud carbonization by carbon dioxide has been described, resulting in scandium leaching and decrease of toxicity. Methods to increase scandium leaching degrees, such as ultrasonic treatment and mechanical activation, were evaluated. It was suggested that carbonated red mud had high sorption activity, causing secondary loss of scandium in the carbonate treatment process.
Article
Chemistry, Analytical
Vladimir S. Semenishchev
Summary: The article discusses the use of two thin-layer sorbents with manganese dioxide for alpha particle spectrometry, showing different adsorption behaviors towards Pb-214 and Bi-214. These sources can be utilized for testing the energy resolution of alpha spectrometers and in student lab experiments, offering simplicity in preparation and no radioactive waste due to the short half-life of Pb-214.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Metallurgy & Metallurgical Engineering
Vladimir Rychkov, Vladimir Baulin, Evgeny Kirillov, Sergey Kirillov, Grigory Bunkov, Denis Smyshlyaev, Maxim Botalov, Vladimir Semenishchev, Andrey Malyshev, Aslanbek Taukin, Alina Yuldashbaeva, Egor Gaidashov
Summary: A series of extraction chromatographic resins containing various phosphorus-containing and DGA-based extractants and ionic liquids were synthesized and studied for their sorption characteristics for rare earth elements (REE) in sulfate solutions. The study found that the resin capacity for REE in sulfuric acid solutions was not affected by the matrix type, and the acidity of the aqueous phase played a significant role in lanthanides sorption from sulfate solutions.
Article
Chemistry, Analytical
Vladimir S. Semenishchev, Anna V. Voronina, Svetlana M. Titova, Lyubov A. Tomashova, Yulia I. Nasonova
Summary: Activity concentrations of natural radionuclides were determined in water from 31 springs in Sverdlovsk region, Russia. The study found insignificant correlation between the activities of different radionuclides.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Review
Chemistry, Applied
Vladimir Rychkov, Evgeny Kirillov, Sergey Kirillov, Grigory Bunkov, Maxim Botalov, Vladimir Semenishchev, Denis Smyshlyaev, Andrey Malyshev, Aslan Taukin, Ata Akcil
Summary: Selection of appropriate method for rare earth element (REE) preconcentration from industrial by-products is challenging. Liquid extraction and ion exchange methods are commonly used, while sorption processes are gaining attention for the recovery of REE from industrial wastes.
SEPARATION AND PURIFICATION REVIEWS
(2022)
Article
Chemistry, Physical
M. G. Dong, D. I. Tishkevich, M. Y. Hanfi, V. S. Semenishchev, M. I. Sayyed, S. Y. Zhou, S. S. Grabchikov, M. U. Khandaker, X. X. Xue, A. L. Zhaludkevich, I. U. Razanau, D. A. Vinnik, S. V. Trukhanov, T. I. Zubar, A. V. Trukhanov
Summary: The study aimed to investigate the radiation shielding features of high-density W-Cu composite materials. The results showed that the discussed composites are suitable for radiation protection.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Analytical
Vladimir S. Semenishchev, Evgenii V. Polyakov, Elena N. Kulyashova, Vitaly A. Rogozhnikov
Summary: The article discusses the results of experiments on the sorption of alpha emitting radionuclides on thin-layer sorbents consisting of manganese dioxide layer coated onto polymer films. The experiments reveal an increase in the width of alpha peaks on the sorbents' spectra with longer sorption times, attributed to the diffusion of alpha emitters into the sorbents. A mathematical treatment method of the alpha spectra is proposed to calculate the diffusion coefficients of the alpha emitters in flat samples. The method is tested on manganese dioxide sorbents after sorption of various radionuclides, showing different mobility patterns for different radionuclides.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Proceedings Paper
Multidisciplinary Sciences
V. S. Semenishchev, S. Mikhalev, S. M. Titova, A. S. Malyshev
VII INTERNATIONAL YOUNG RESEARCHERS' CONFERENCE - PHYSICS, TECHNOLOGY, INNOVATIONS (PTI-2020)
(2020)
Proceedings Paper
Multidisciplinary Sciences
O. Yakovleva, A. K. Abdrahmanova, S. M. Titova, A. S. Malyshev, E. Kirillov, V. N. Rychkov
VII INTERNATIONAL YOUNG RESEARCHERS' CONFERENCE - PHYSICS, TECHNOLOGY, INNOVATIONS (PTI-2020)
(2020)
