Article
Environmental Sciences
Hao Wu, Zhanghao Chen, Feng Sheng, Chao Wang, Xin Jin, Cheng Gu
Summary: Biochar is widely used in soil for agricultural and environmental purposes, and the soluble fraction of biochar, known as dissolved biochar (DBC), can have a significant impact on the dissolution of ferric oxides. Organic ligand-promoted dissolution was identified as the main mechanism for iron release from ferrihydrite, with DBC components playing a major role in this process. Additionally, DBC was found to enhance the release of chromium from dichromate adsorbed ferric mineral, suggesting a potential increase in the mobility and bioavailability of iron and other heavy metals in acidic soils with high iron content. More research is needed to assess the long-term effects of biochar application on such soils.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Amanda Dorfman, Anna Wanhala, Peter Eng, Joanne Stubbs, Omar Colon, Malik Donetian, Jacquelyn N. Bracco
Summary: Understanding the sorption behavior of ions at the mineral-water interface is crucial for determining the fate of elements in the environment. This study used barite to investigate the interactions between metals, organic molecules, and ionic crystals. The results showed that the presence of ethylenediaminetetraacetic acid (EDTA) disrupted the barite surface structure and inhibited strontium (Sr) incorporation into the surface. EDTA also formed complexes with Sr in solution, limiting the amount of Sr2+ in solution. When desorbed, approximately 75% of the sorbed strontium was removed, suggesting that changes following Sr sorption in the presence of EDTA may be irreversible.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Chengchen Sun, Zequn Yao, Qianqian Wang, Lijie Guo, Xiaodong Shen
Summary: In this study, first principles calculation combined with scanning electron microscopy (SEM) was used to investigate the mineral dissolution mechanism of Mg2SiO4 promoted by different types of organic acids. The results show that the hydroxylation of the mineral surface is caused by the breaking of the H-O bond in the carboxyl group of the adsorbed organic acid molecules, and a greater number of carboxyl groups is more favorable for mineral dissolution.
APPLIED SURFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Hans Koss, Barry Honig, Lawrence Shapiro, Arthur G. Palmer
Summary: NMR spectroscopy was used to elucidate the roles of Trp2 and Trp4 in Cadherin-11 dimerization, revealing that the dimerization mechanism of type II cadherins involves coupled folding and strand swapping.
Article
Chemistry, Physical
Yu Sun, Shengyu Liu, Quanbao Wen, Jianying Guo, Zhichao Yang
Summary: The mechanism of inorganic acid and alkali promoted weathering of albite was investigated through leaching experiments and DFT simulations in this study. The leaching effect of albite was found to be strongest with hydrochloric acid, followed by potassium hydroxide and deionized water. The interactions of acid and alkali with albite caused contraction and expansion of the albite lattice, resulting in its surface damage and release of sodium element.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Ping Wang, Hao Liu, Congxin Wang, Guang Lv, Donge Wang, Huaijun Ma, Zhijian Tian
Summary: This study demonstrates a method for the direct synthesis of shaped molecular sieves with improved catalytic performance for industrial applications. By utilizing specific experimental steps and ratios, MgAPO-11 molecular sieves with excellent catalytic performance were successfully prepared, showing potential for green synthesis of molecular sieves in industry.
Article
Biochemistry & Molecular Biology
Jerome Laisney, Mireille Chevallet, Caroline Fauquant, Camille Sageot, Yohann Moreau, Daniela Predoi, Nathalie Herlin-Boime, Colette Lebrun, Isabelle Michaud-Soret
Summary: This study investigated the interaction between titanium dioxide nanoparticles (TiO2-NPs) and the chelating enterobactin siderophore, and showed for the first time the dissolution of anatase TiO2-NP surface in the presence of enterobactin, leading to the formation of a hexacoordinated titanium-enterobactin complex.
Article
Chemistry, Multidisciplinary
Joseph A. Zurakowski, Brady J. H. Austen, Maeve C. Dufour, Denis M. Spasyuk, David J. Nelson, Marcus W. Drover
Summary: The study demonstrates the importance of thoughtful ligand design in the intermolecular activation of iodobenzene in catalytic reactions. A specific nickel complex has shown excellent reactivity in this reaction. Furthermore, the secondary coordination sphere has been shown to have a significant impact on the formation of reaction products.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Xiaoxuan Wang, Xiaoyan Guo, Lixiang Zhu, Shuo Wang, Meishuai Zou, Xiaodong Li, Xiaodong Zhang, Tinglu Song
Summary: This study prepared highly active magnesium-based materials through ball milling, with the addition of chlorides effectively breaking the continuity of oxide films and introducing micro defects, ultimately improving the hydrogen production performance of magnesium. The synthesized Mg-6%CoCl2 composite exhibited the best performance, with an activation mechanism involving synergistic effects of micro defects and surface metallic compounds.
Article
Engineering, Environmental
Gang Chu, Wangmin Wang, Yang Dou, Wenxiu Qin, Da Tian, Youbin Si
Summary: The dissolution of phosphorus species from P-rich chars derived from wood, cellulose, and lignin at different temperatures was investigated. The results showed that P-rich chars can release phosphorus elements, and the dissolution of phosphorus enhanced the sorption of bisphenol A while decreasing the sorption of carbamazepine. This study provides insights into the potential use of P-rich chars as phosphatic fertilizers for soil improvement and sheds light on the sorption mechanisms of hydrophobic compounds.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Xuewu Li, Qingyuan Yu, Xi Chen, Qiaoxin Zhang
Summary: A new-type magnesium alloy with prominent solubility and mechanical property is prepared for fracturing part in petroleum extraction. The alloy shows enhanced compression strength and rapid decomposition with increasing decomposition time and zinc content. This research provides a new accessible alloy for rapid dissolution of fracturing part and stable compression strength in oil-gas reservoir exploitation.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xinglin Yang, Quanhui Hou, Libing Yu, Jiaqi Zhang
Summary: The hydrogen storage performance of MgH2 can be effectively improved by doping with a flake Ni nano-catalyst, achieving high hydrogen release and absorption rates at elevated temperatures. The addition of Ni also lowers the activation energies for hydrogen absorption and dehydrogenation, while forming Mg2Ni/Mg2NiH4 on the surface to act as a hydrogen pump, accelerating the reaction rates.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Quentin Duez, Paul Tinnemans, Johannes A. A. W. Elemans, Jana Roithova
Summary: We present a new approach to determine ligand exchange parameters based on electrospray ionization mass spectrometry (ESI-MS). This method allows for the quantitative investigation of the solution-phase equilibria by introducing isotopically labelled ligands to a solution of metal host and unlabelled ligands. Our ESI-MS approach provides rate constants and activation parameters for ligand dissociation in the solution, providing mechanistic insights that are not easily obtained from traditional solution-phase techniques.
Article
Chemistry, Medicinal
Shuang Liu, Martine Abboud, Victor Mikhailov, Xiao Liu, Raphael Reinbold, Christopher J. Schofield
Summary: This study reported the binding and inhibition studies of 13 IDH1/2 variant inhibitors on wild-type IDH1 and its cancer-associated variant, IDH1 R132H. Interestingly, all the variant inhibitors were able to bind wild-type IDH1 despite not inhibiting it or only weakly inhibiting it. The selectivity of the IDH1 R132H variant over wild-type IDH1 is not primarily related to the affinities of the inhibitors for the resting forms of the enzymes. The independent binding of Mg2+ and 2-oxoglutarate to the IDH1 variant makes it more susceptible to allosteric inhibition compared to the tighter binding of the isocitrate-Mg2+ complex substrate to wild-type IDH1. The results highlight that binding affinity does not necessarily correlate with inhibition selectivity and have implications for interpreting inhibitor screening results with IDH and related enzymes.
JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Vaclav Brezina, Lenka Hanykova, Nadiia Velychkivska, Jonathan P. Hill, Jan Labuta
Summary: Nuclear magnetic resonance (NMR) lineshape analysis is a powerful tool for studying chemical kinetics. This article provides techniques for analyzing the relationship between experimentally observed spin kinetics and corresponding chemical kinetics. The advantages of using analytical solutions for lineshape analysis over numerical calculations are discussed. The article also discusses various aspects of exchange kinetics and introduces the concept of "reduced equivalent schemes" to simplify the analysis. Theoretical results are applied to the analysis of different systems in literature examples.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Sulakshana Shenoy, Chitiphon Chuaicham, Takamasa Okumura, Karthikeyan Sekar, Keiko Sasaki
Summary: This study utilizes an in-situ simple tactic polycondensation method to produce porous graphitic carbon nitride nanosheets on CaFe2O4 particles, forming a quasi-polymeric heterojunction. The heterojunction traps excited electrons through interfacial electron trap states, preventing charge carrier recombination and enhancing pollutant degradation rates.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Yoshiki Egawa, Taketoshi Koita, Soowon Lim, Takao Namihira, Chiharu Tokoro
Summary: The development of efficient recycling technology for resin adhesives is necessary for accelerating the resource recycling of plastics and creating a recycling-oriented society. In this study, we utilized a fine wire explosion induced by an electric pulse to selectively separate different resin adherends. By applying a solvent and a silver wire to the interface of two resin plates and applying electric pulses, the separation of resin materials was achieved through gas expansion and wire vaporization.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Environmental Sciences
K. Tsuchiya, S. Fuchida, C. Tokoro
Summary: The study found that LDHs (layered double hydroxides) produced from magnesium oxide (MgO) and aluminum (Al) have good performance in removing hexavalent selenium (Se(VI)). By extending the hydration time of MgO and/or the reaction time of MgO-Al, Mg-Al LDHs with good Se(VI)-removal performance can be produced.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Manabu Inutsuka, Masataka Kondo, Taketoshi Koita, Soowon Lim, Keisuke Ota, Tomoki Honda, Ryo Ogawa, Takao Namihira, Chiharu Tokoro
Summary: Facile techniques for debonding polymeric adhesives from metals are needed for material recycling. A promising solution is the pulsed discharge debonding method, where a high voltage pulsed discharge is applied to the system, resulting in rapid gas expansion and shock-wave emissions that debond the adhesive. However, the conventional method requires water, but this study successfully added filler to the adhesive to achieve effective pulsed discharge debonding. The threshold volume fraction of the filler for effective pulsed discharge inside the adhesive was determined based on experimental data and a percolation model.
JOURNAL OF ADHESION
(2023)
Article
Chemistry, Physical
Juan Qin, Sujuan Yuan, Mauricio Cordova-Udaeta, Keishi Oyama, Chiharu Tokoro
Summary: In this study, tobermorite was synthesized and used to remove Cd2+ from an aqueous solution. The synthesized tobermorite had a well-crystallized structure with a lot of mesopores and a large specific surface area. It could adjust the solution pH through the release of Ca2+ and OH- ions. The efficient removal of Cd2+ was achieved through surface complexation and ion exchange.
Article
Chemistry, Physical
Takumi Inoue, Chitiphon Chuaicham, Noritaka Saito, Bunsho Ohtani, Keiko Sasaki
Summary: Graphitic carbon nitride/artificial converter slag (gCN/artCS) composites were fabricated as photocatalysts, showing enhanced photocatalytic degradation of imidacloprid under visible light irradiation. The optimized gCN/artCS composite exhibited faster degradation rate compared to pure gCN, attributed to improved separation and transportation of photoinduced electrons and holes. The development of an interfacial Z-scheme heterojunction between gCN and iron oxide included in artCS was suggested, reducing electron-hole pair recombination. The gCN/realCS composite showed potential for hydrogen evolution, although it had a lower H2 evolution rate compared to gCN/artCS.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Engineering, Environmental
Aya Heiho, Izuru Suwa, Yi Dou, Soowon Lim, Takao Namihira, Taketoshi Koita, Kazuhiro Mochidzuki, Shinsuke Murakami, Ichiro Daigo, Chiharu Tokoro, Yasunori Kikuchi
Summary: This study conducted a prospective life cycle assessment to evaluate the effectiveness of proposed technologies for recycling photovoltaic panels. The technologies include aluminum frame separation, precise mechanical separation, hot-knife method for glass/ethylene-vinyl acetate separation, and high-voltage pulsed discharge for copper and silver recovery. Applying resource recovery technology reduces landfill waste and enables the reuse or recycle of glass. The high-voltage pulsed discharge produces a high concentration of copper that can be easily incorporated into smelting processes.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Chemistry, Physical
Chitiphon Chuaicham, Yuto Noguchi, Sulakshana Shenoy, Kaiqian Shu, Jirawat Trakulmututa, Assadawoot Srikhaow, Karthikeyan Sekar, Keiko Sasaki
Summary: Pd nanoparticles were successfully deposited on Fe(III)-modified hydroxyapatite (HAp) and used as a photocatalyst for simultaneous H-2 evolution and xylose conversion. Pd@FeHAp exhibited higher xylose conversion and increased lactic acid and formic acid production compared to pristine HAp and FeHAp. The Pd@FeHAp composite showed improved photocatalytic activity, attributed to the separation and transport of photogenerated electron-hole pairs, as well as a decrease in electron trap density and energy band gap.
Article
Chemistry, Physical
Sulakshana Shenoy, Mohsen M. Farahat, Chitiphon Chuaicham, Karthikeyan Sekar, Boopathy Ramasamy, Keiko Sasaki
Summary: Brazilian hematite can be transformed into a heterophase photocatalyst via a simple heat treatment process, and its photocatalytic performance is significantly enhanced by combining with g-C3N4. The degradation efficiency of ofloxacin is 4.8 times higher compared to pure g-C3N4. The catalyst exhibits good stability and the mechanism of degradation involves superoxide anion radicals and holes.
Article
Geochemistry & Geophysics
Ahmed M. Elmahdy, Hajime Miki, Keiko Sasaki, Mohsen Farahat
Summary: The effect of microwave pre-treatment on the magnetic properties of tennantite and enargite was investigated. Magnetic susceptibility, XRD, and XPS characterization were conducted to explore the changes in their magnetic properties. Magnetic separation of chalcopyrite binary mixtures with enargite and tennantite was performed, showing significant arsenic rejection rates of 84.2% and 76.3% respectively.
Article
Engineering, Environmental
Kaiqian Shu, Chitiphon Chuaicham, Yuto Noguchi, Longhua Xu, Keiko Sasaki
Summary: A novel composite photocatalyst with a unique heterojunction structure was synthesized using a special synthetic technique. The heterojunction structure significantly improves the migration efficiency of charge carriers. The results demonstrate the potential application of photocatalysts derived from industrial solid waste in industrial wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Yanhui Kong, Yutaro Takaya, Mauricio Cordova-Udaeta, Chiharu Tokoro
Summary: This study proposes a novel method for selective lithium extraction from spent ternary nickel-cobalt-manganese (NCM) LIBs using NaClO as an oxidant under near-neutral pH and oxidative conditions. The addition of NaClO is found to be essential for the selective extraction of lithium from the layered NCM structure under non-acidic conditions. Additionally, the oxidation by NaClO also induces cracking and phase transition of the spent cathode particles, enhancing lithium extraction efficiency. The proposed method is simple, safe, and cost-effective, making it attractive for practical application.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yutaro Takaya, Syuichi Kuwaba, Yusaku Tsujimura, Katsunori Yamaguchi, Chiharu Tokoro
Summary: All-solid-state lithium-ion batteries (ASS-LIBs) are expected to replace current liquid-based LIBs in the near future due to their high energy density and improved safety. However, it is yet to be determined if ASS-LIBs can be effectively recycled using the current recycling processes used for liquid-based LIBs.
Article
Geochemistry & Geophysics
Shuang Xu, Binling Guo, Keiko Sasaki, Xinhong Qiu
Summary: This study investigated the influence of Mg doping on the removal of borate by CaAl-layered double hydroxides (LDHs) at different calcination temperatures. The results showed that Mg doping increased the BET surface area and enhanced the adsorption capacity of uncalcined LDHs, especially at high borate concentrations. However, at high calcination temperatures, Mg-doped LDHs had a slightly better adsorption effect at low borate concentrations, but deteriorated at high concentrations due to the crystallinity and morphology changes.
Article
Chemistry, Multidisciplinary
Mani Preeyanghaa, Chitiphon Chuaicham, Sulakshana Shenoy, Bernaurdshaw Neppolian, Keiko Sasaki, Karthikeyan Sekar
Summary: In this article, a sapiential method for producing highly effective oxygen-containing CN with hierarchical porous hollow nanotubes (HTCN) is presented using thermal polycondensation of oxalic acid-assisted supramolecular aggregates. Due to the synergistic effect of spatial charge separation and optical absorption ability, HTCN outperforms pristine CN nanosheets (NSCN) in photocatalytic hydrogen production. This research will provide a novel cognitive perspective and understanding for constructing contemporary hydrogen production photocatalysts.
CHEMICAL COMMUNICATIONS
(2023)
