Article
Multidisciplinary Sciences
Jamie Farquharson, Hugh Tuffen, Fabian B. Wadsworth, Jonathan M. Castro, Holly Unwin, C. Ian Schipper
Summary: Emissions of ash in explosive silicic eruptions can have significant impacts on human health, agriculture, infrastructure, and aviation. This study presents evidence from the Cordon Caulle volcano in Chile, showing that fine and ultra-fine ash particles are captured and stored in the shallow subsurface instead of being emitted. The authors propose a new model of in-vent ash migration and sticking, which decouples eruptive processes from the products emitted.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Dingeman L. H. van der Haven, Roderick Prudent Tas, Pim van der Hoorn, Remco van der Hofstad, Ilja Karina Voets
Summary: Accurate determination of the location of soft interfaces is crucial for the study of nanoscale wetting phenomena. A new method based on maximum likelihood estimation (MLE) is proposed in this study to accurately determine the interface location. Experimental results show that the MLE rapidly converges to the true interface location and remains accurate even under reduced field-of-view or in the presence of particles on the interface.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Liu Zhu, Hong-Bo Guo, Sheng-Kai Gong
Summary: Sub-micron Co-Al2O3 composite powders were synthesized at room temperature using ultrasonic-assisted electroless plating process. The plating rate and cobalt content can be controlled by adjusting the process parameters.
Article
Chemistry, Multidisciplinary
Gulzhian Dzhardimalieva, Lyubov Bondarenko, Erzsebet Illes, Etelka Tombacz, Nataliya Tropskaya, Igor Magomedov, Alexander Orekhov, Kamila Kydralieva
Summary: The production of stable and homogeneous batches during nanoparticle fabrication is challenging, with an important consideration being the dispersion stage of pre-formed samples. Stirred samples showed a higher loading capacity towards polyanions compared to sonicated ones.
Article
Geochemistry & Geophysics
Emrah Durgut, Mustafa Cinar, Mert Terzi, Ilgin Kursun Unver, Yildiz Yildirim, Orhan Ozdemir
Summary: This study investigated the dispersion properties of pure halloysite, kaolinite, and quartz minerals in halloysite ore in the presence and absence of dispersants. Various characterization techniques were used to analyze the samples, and zeta potential measurements and dispersion/sedimentation experiments were conducted to study the physico-chemical properties of the minerals. The results showed that the use of dispersants affected the surface charges of the minerals and slowed down sedimentation. Mechanical dispersion and pulp viscosity experiments further explored the dispersion properties of the halloysite ore. Overall, the use of dispersants enhanced the mechanical dispersion effect for separating plastic clay minerals from hard minerals in an aqueous medium.
Article
Engineering, Environmental
Xiaoning Song, Boyou Hou, Zhengde Han, Ye-Tang Pan, Zhishuai Geng, Laia Haurie Ibarra, Rongjie Yang
Summary: We successfully designed a polyphosphazene hollow hybrid material via the polymerization of phosphazene accompanied by the etching of ZIF-67 and cobalt compounds by generated HCl. The hybrid material (CPPHS) was composed of cobalt-doped polyphosphazene hollow sub-micron polyhedrons (CP) and polyphosphazene hollow nanospheres (PHNS) with different dimensions and magnitudes of sizes. Adding 2.0 wt% CPPHS to epoxy resin increased the limiting oxygen index by 27.6%, while reducing the peak heat release rate and total smoke production by 40.1% and 38.8%, respectively.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Mingming Sun, Wei Guo, Meiyu Meng, Qiuyu Zhang
Summary: Benefitting from the tunable heterogeneous interface and electronic interaction, metal-polymer-based hybrid composites have attracted attention. The synthesis methodology and structure-performance relationship need to be improved. In this study, an anisotropic eccentric Ag@polyaniline (PANI) particle was successfully fabricated by resolving the dynamics issue in the Ag+-aniline reaction system. The study demonstrates the synergy mechanism of polyvinyl pyrrolidone (PVP) and in-situ generated PANI for modifying the dynamic reaction interface and provides an inspiring concept of eccentric microstructure engineering.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Fazel Abdolahpur Monikh, Martina G. Vijver, Denise M. Mitrano, Heather A. Leslie, Zhiling Guo, Peng Zhang, Iseult Lynch, Eugenia Valsami-Jones, Willie J. G. M. Peijnenburg
Summary: The debate on hazards associated with sub-micron sized plastics is limited by a lack of quantitative data on their uptake and biological fate in organisms. Analytical methods should be developed to identify and quantify sub-micron particulate plastic in biota to understand their biodistribution, localization, bioaccumulation, and clearance. These methods are expected to be transferable to studies considering sub-micron plastics in various aspects like food, consumer products, human health, and the environment.
Article
Chemistry, Multidisciplinary
Meiyuan Qi, Wenhe Ma, Qin Xu, Fei Wang, Ping Song, Sisi Jia, Xiaolei Zuo, Mingqiang Li, Guangbao Yao, Chunhai Fan
Summary: Dynamic molecular interactions in chemical reaction networks lead to complex behaviors in living systems. Programming DNA molecular reactions at molecular and nanometer scales have been achieved, but achieving programmable autonomous behavior at submicron or larger scales remains challenging. This study presents a mechanism of meta-DNA strand displacement reactions (M-SDRs) mediated solely by meta-toehold (M-toehold) using versatile submicron building blocks of meta-DNA (M-DNA). M-SDR emulates the toehold binding and branch migration processes and shows potential for programming autonomous behavior at the cellular level.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Andrew Loh, Donghwi Kim, Kyucheol Hwang, Joon Geon An, Narin Choi, Sangmin Hyun, Un Hyuk Yim
Summary: Using a high-resolution time-of-flight aerosol mass spectrometer, this study found that the emissions from ships in the anchorage zone contribute significantly to air pollution in the Busan Port area, especially for oxidized organic aerosols. The concentration of pollutants in the air correlated with wind direction, with the highest concentrations observed when the winds came from the anchorage zone and the lowest concentrations when the winds came from the open ocean. The emissions from ship activities in the anchorage zone were calculated, and the results indicate that they are an important source of pollution in the Busan Port area.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Marlene Schmid, Johann Plank
Summary: Polycarboxylate (PCE) comb polymers were investigated as dispersants for suspensions of individual calcined clay samples. Results showed that the methallyl ether (HPEG) based PCE outperformed the methacrylate ester (MPEG) based PCE, but meta illite could not be satisfactorily dispersed.
APPLIED CLAY SCIENCE
(2021)
Review
Chemistry, Physical
Shiva Mohammadi-Jam, Kristian E. Waters, Richard W. Greenwood
Summary: This article reviews the use of the electroacoustic technique in determining the zeta potential of concentrated aqueous suspensions and emphasizes the importance of identifying the isoelectric points for colloidal stability and processing. The application of the technique in polymer lattices is also summarized.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Bogyeong Kim, Seung-Woo Lee, Eui-Man Jung, Eun-Hee Lee
Summary: The capability of bacterial biofilms, specifically Acinetobacter sp., in removing sub-micron-sized PS microplastics through biosorption was evaluated in this study. The biosorption of 430 nm-PS microplastics onto the Acinetobacter sp. biofilm was well explained by the pseudo-second-order kinetics and Freundlich isotherm models. However, the biosorption capability of Acinetobacter sp. diminished after incubation with the 430 nm-PS microplastics in environmental freshwaters for 7 days.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Materials Science, Ceramics
Boran Zhang, Fuqiang Ren, Chao Wang, Jingjing Liu, Yi Zhao, Ge He, Jinlong Yang
Summary: This research demonstrates the construction of ceramic foam-based filters using diatomite and kaolin powder as starting materials. The resulting products show a hierarchical pore structure with multiple well-controlled micron-sized window pores, exhibiting high removal efficiency.
CERAMICS INTERNATIONAL
(2022)
Article
Multidisciplinary Sciences
Richard J. Smith, Fernando Perez-Cota, Leonel Marques, Matt Clark
Summary: Brillouin light scattering (BLS) is a promising method for cell imaging and characterisation, offering elasticity-related contrast, optical resolution, and label-free operation. Phonon microscopy, which detects BLS from laser generated coherent phonon fields, presents challenges in imaging single cells due to poor signal to noise ratio and acquisition time. Recent advances in instrumentation have enabled imaging of fixed and living cells with improved axial resolution and accuracy.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Applied
Norio Maeda, Takaaki Katakura, Tomonori Fukasawa, An-Ni Huang, Takashi Kawano, Kunihiro Fukui
FUEL PROCESSING TECHNOLOGY
(2017)
Article
Chemistry, Applied
Tomonori Fukasawa, Akira Horigome, Takayuki Tsu, Achmad Dwitama Karisma, Norio Maeda, An-Ni Huang, Kunihiro Fukui
FUEL PROCESSING TECHNOLOGY
(2017)
Article
Engineering, Chemical
Teruo Oshitari, Kazumi Yamamoto, Kunihiro Fukui, Hideto Yoshida
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
(2017)
Article
Instruments & Instrumentation
Achmad Dwitama Karisma, Taishu Hamaba, Tomonori Fukasawa, An-Ni Huang, Tomoomi Segawa, Kunihiro Fukui
REVIEW OF SCIENTIFIC INSTRUMENTS
(2017)
Article
Engineering, Chemical
Tomonori Fukasawa, Akira Horigome, Achmad Dwitama Karisma, Norio Maeda, An-Ni Huang, Kunihiro Fukui
ADVANCED POWDER TECHNOLOGY
(2018)
Article
Energy & Fuels
Norio Maeda, Tomonori Fukasawa, Takaaki Katakura, Munechika Ito, Toru Ishigami, An-Ni Huang, Kunihiro Fukui
Article
Engineering, Chemical
An-Ni Huang, Keiya Ito, Tomonori Fukasawa, Hideto Yoshida, Hsiu-Po Kuo, Kunihiro Fukui
SEPARATION AND PURIFICATION TECHNOLOGY
(2018)
Article
Chemistry, Multidisciplinary
Masaki Ueda, Mohammad Irwan Fatkhur Rozy, Tomonori Fukasawa, Toru Ishigami, Kunihiro Fukui
Article
Engineering, Chemical
Achmad Dwitama Karisma, Yoshihiro Shinokawa, Tomonori Fukasawa, Toru Ishigami, Kunihiro Fukui
Summary: The NiCuZn ferrite nanoparticles were successfully synthesized using the MDD method, showing smaller particle size and higher saturation magnetization compared to the traditional SSR method. They exhibit properties suitable for the preparation of soft ferromagnetic materials.
PARTICULATE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Kunihiro Fukui, Kazuki Momen, Genki Ichiba, Tomonori Fukasawa, Toru Ishigami
ADVANCED POWDER TECHNOLOGY
(2020)
Article
Engineering, Chemical
Masaki Ueda, Tomonori Fukasawa, Toru Ishigami, Kunihiro Fukui
Summary: Surface wettability has a significant impact on the coalescence of oil droplets and pressure drop within a fibrous filter. Low surface wettability promotes droplet coalescence through closely attached fibers, while high surface wettability enhances coalescence through small interfiber spacing and increases pressure drop.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Mohammadreza Shirzadi, Masaki Ueda, Kodai Hada, Tomonori Fukasawa, Kunihiro Fukui, Yasushi Mino, Toshinori Tsuru, Toru Ishigami
Summary: Due to limitations in visualization techniques and low-resolution numerical models, the detailed behavior of oil droplets during microfiltration is not well understood. In this study, a high-resolution CFD model based on an in-house DNS code was used to analyze the dynamics of oil-in-water emulsions using a microfiltration membrane. The microporous structure of commercial ceramic membranes was obtained using image processing techniques, and numerical simulations of microfiltration were conducted to study the effects of different parameters on filtration performance. The results showed that droplet deformation and membrane structure significantly influenced filtration behavior and performance.
Article
Engineering, Chemical
Mohammadreza Shirzadi, Zhan Li, Tomohisa Yoshioka, Hideto Matsuyama, Tomonori Fukasawa, Kunihiro Fukui, Toru Ishigami
Summary: We developed a computational fluid dynamics model to describe the separation of ammonia-water in a vacuum membrane distillation module and validated the model through experiments. The model accurately predicted the permeation rate, ammonia recovery ratio, and ammonia concentration on the permeate side, and demonstrated the sensitivity of module performance to process parameters.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Mechanics
Mohammadreza Shirzadi, Tomonori Fukasawa, Kunihiro Fukui, Toru Ishigami
Summary: This study developed a data-driven model that predicts fluid-particle dynamics by coupling a deep CNN flow surrogate model and a discrete phase model, providing valuable insights for multiphysics fluid mechanics problems encountered in fibrous systems.
Article
Nanoscience & Nanotechnology
Kodai Hada, Mohammadreza Shirzadi, Tomonori Fukasawa, Kunihiro Fukui, Toru Ishigami
Summary: This study presents a numerical simulation model to investigate the collection behavior of submicron-sized droplets in commercially available face masks. The results show that face masks with larger pores exhibit higher performance in capturing droplets.
Article
Engineering, Chemical
Yongxiang Wu, Nguyen Thi Hong Nhung, Deqian Zeng, Nengneng Luo, Akira Otsuki, Gjergj Dodbiba, Toyohisa Fujita
Summary: This study proposed a novel method for synthesizing flower-like vaterite calcium carbonate using nanobubble-containing ethanol and water mixed solution as the solvent and discussed the formation mechanism of vaterite with different shapes. The synthesized vaterite has significant practical interest in the integrated treatment of wastewater contaminated by heavy metals with effective Cd(II) removal, providing a promising field for studying heavy metal and pollutant adsorption in the liquid phase.
ADVANCED POWDER TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jian Gong, Lipo Cheng, Ming Liu, Jie Jiang, Xiaoduo Ou
Summary: This study investigates the effects of particle shape on the collapse of granular columns using the discrete element method. The results show that particle shape has a significant impact on deposition morphology, energy evolution, and mechanical coordination number. Sphericity and angularity are identified as the most important macroscale factors, while roughness has a weaker microscale influence.
ADVANCED POWDER TECHNOLOGY
(2024)
