Article
Thermodynamics
Zhijian Liu, Hangyao Zhu, Yangfan Song, Guoqing Cao
Summary: This study investigated the diffusion of human exhaled particles in a ventilated room using a combination of numerical simulation and laboratory experiments. The results showed that under high air supply velocity conditions, the diffusion velocity and range of exhaled particles were greater. It was found that the particles would spread to the whole room within at least 900 seconds.
BUILDING SIMULATION
(2022)
Article
Mechanics
Khaled Talaat, Mohamed Abuhegazy, Omar A. Mahfoze, Osman Anderoglu, Svetlana V. Poroseva
Summary: Identifying economically viable intervention measures to reduce COVID-19 transmission on aircraft is crucial, especially with the emergence of new SARS-CoV2 variants. Using computational simulations, it was found that employing sneeze shields on full capacity flights can significantly reduce aerosol transmission compared to reduced capacity flights without shields.
Article
Multidisciplinary Sciences
Ke Ding, Xin Huang, Aijun Ding, Minghuai Wang, Hang Su, Veli-Matti Kerminen, Tuukka Petaja, Zhemin Tan, Zilin Wang, Derong Zhou, Jianning Sun, Hong Liao, Huijun Wang, Ken Carslaw, Robert Wood, Paquita Zuidema, Daniel Rosenfeld, Markku Kulmala, Congbin Fu, Ulrich Poschl, Yafang Cheng, Meinrat O. Andreae
Summary: The study shows that biomass burning aerosols significantly increase low cloud cover over subtropical southeastern Asia.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Chaorui Yan, Tao Cheng, Baoguo Li, Jianying Shang
Summary: Livestock manure and aquaculture wastewater introduce animal manure-derived colloids into the environment, affecting the transport of titanium dioxide nanoparticles in saturated porous media. Cow manure-derived colloids contain humic-like substances, while pig manure-derived colloids contain protein components and humic-like substances, leading to changes in the aggregation and transport of TiO2. The interaction between manure-derived colloids and TiO2 alters the zeta-potential and aggregation status of TiO2 in the aqueous system, influencing its mobility in the subsurface.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Daniel W. Weisgerber, Makiko Hatori, Xiangpeng Li, Adam R. Abate
Summary: In this study, we demonstrated a droplet microfluidic method for fabricating polyhedral microparticles with controlled concavity. By manipulating pressure and particle rheology, we achieved diverse particle shapes and increased capture efficiency in particle-templated emulsification, leading to enhanced chemical and biological functionality of the microparticles.
ANALYTICAL CHEMISTRY
(2022)
Article
Mechanics
C. Liang, H. P. Wang, P. C. Zhang, B. Wei
Summary: The dripping dynamics of electromagnetically levitated liquid Ti-Al-Nb alloy under high temperatures was studied using numerical simulation and experiments, defining a critical shape parameter and proposing three methods to prevent dripping failure. Deformation patterns and flow behavior were analyzed in a wide current range, showing a transformation in droplet shape and flow vortex behavior with increasing excitation current.
Article
Physics, Multidisciplinary
Eric Cereceda-Lopez, Dominik Lips, Antonio Ortiz-Ambriz, Artem Ryabov, Philipp Maass, Pietro Tierno
Summary: The study demonstrates that hydrodynamic interactions between fluid-dispersed particles hinder transport across barriers in a flow-driven system, contrary to force-driven motion. This impact is shown to be a generic feature of flow-driven transport through a combination of experiments and theoretical models.
PHYSICAL REVIEW LETTERS
(2021)
Article
Construction & Building Technology
Yu Zhou, Shen Ji
Summary: The study investigates the transport of droplet aerosols generated by doctors and patients in a fever clinic to reduce the risk of infection. It evaluates the purification capacity of ventilation systems and provides suggestions to improve air quality.
BUILDING AND ENVIRONMENT
(2021)
Article
Engineering, Environmental
Tao Luo, Jing Xu, Wei Cheng, Lian Zhou, Remi Marsac, Feng Wu, Jean-Francois Boily, Khalil Hanna
Summary: The study demonstrates that pharmaceutical compounds can form dimers on specific minerals, affecting their transport behavior. By observing the adsorption and transport of these compounds on minerals in experiments, it is found that co-binding reactions alter their transport patterns.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Priyanka Sharan, Witold Postek, Thomas Gemming, Piotr Garstecki, Juliane Simmchen
Summary: This study systematically investigated the motion of Pt@SiO2 Janus particles at a liquid-liquid interface, finding that the propulsion behavior on both oil-water and solid-water interfaces is quantitatively similar. The motion characteristics are controlled by factors such as reaction product absorption by oil, slip locking by surfactant, and potential Marangoni effect.
Article
Thermodynamics
E. J. Vega, J. M. Montanero
Summary: In this study, we experimentally investigated the bursting of a bubble covered with a surfactant. We found that the bubble bursting time is longer compared to a surfactant-free bubble due to interfacial elasticity. Furthermore, the Marangoni stress drives liquid flow that allows the jet to escape from the end-pinching mechanism within a certain surfactant concentration range.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Chemistry, Physical
Gannena K. S. Raghuram, Lalit Bansal, Saptarshi Basu, Aloke Kumar
Summary: This study experimentally investigates the concentration and molecular weight dependence of deposit patterns of polymer droplets on hydrophobic surfaces. The results show a transition from ring to non-ring patterns with increasing concentration, while decreasing the polymer molecular weight does not suppress the coffee ring formation. The findings provide insights for applications like inkjet printing, surface coatings, and biotechnology assays where tuning polymer deposit patterns is important.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Environmental Sciences
Yu Cao, Chengxue Ma, Jinni Yao, Wanpeng Chen, Li Gu, Hongxia Liu, Caihong Liu, Jiaming Xiong, Xiaoliu Huangfu
Summary: This study systematically investigated the impact of wood-derived biochar (WB) and corn straw-derived biochar (CB) colloids on Tl(I) transport in water-saturated porous media under different pH and ionic strengths. The results showed that WB colloids improved Tl(I) transport under all conditions, while CB colloids only promoted Tl(I) mobility at low ionic strength. The two-site nonequilibrium model and two-site kinetic attachment/detachment model effectively described the transport of Tl(I) and biochar colloids, respectively.
Article
Chemistry, Physical
Kirill A. Komarov, Vladimir N. Mantsevich, Stanislav O. Yurchenko
Summary: This study investigates the tunable interactions between composite particles with core-shell structure in a rotating electric field, showing that engineering the internal structure provides an effective tool for designing interactions. By generalizing an integral theory, the study reveals the main trends in interactions influenced by the structure.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Analytical
Hanjin Yoo, Minjeong Kim, Yoojin Lee, Jonghyeon Park, Hayeong Lee, Young-Chul Song, Chul-Un Ro
Summary: This study presents a method combining fluorescence microscopy, Raman microspectrometry, and scanning electron microscopy/energy-dispersive X-ray spectrometry for analyzing inhalable airborne microplastics (AMPs) in ambient PM10 aerosols. The results show that approximately 0.008% of the particles collected by a PM10 sampler had high microplastic potential, corresponding to about 800 particles/m3. Among the stained particles of <10 μm, 27% were determined to be plastic, while the remaining 73% were from tire/road wear. This study provides important insights into the characteristics of inhalable AMPs in ambient PM10 aerosols that are critical for human health and climate change.
ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Sadia Ilyas, Rajiv Ranjan Srivastava, Hyunjung Kim, Nimra Ilyas
Summary: This study focused on improving the extraction yield of valuable metals during bioleaching of waste printed circuit boards (WPCBs) by acid pretreatment and parametric optimization. The research demonstrated the auto-catalytic behavior of Cu and the transition from chemically-controlled to diffusion-controlled mechanism in bioleaching kinetics.
Article
Materials Science, Multidisciplinary
Sadia Ilyas, Hyunjung Kim
Summary: The depletion of critical metals in natural reserves and the increasing demands in advanced technology application highlight the need to explore end-of-life/waste materials as unconventional resources. A study found that an integrative bio-solvo-chemical technique could efficiently recycle platinum-group metals (PGMs) from exhausted autocatalytic converters.
Article
Chemistry, Multidisciplinary
Sadia Ilyas, Rajiv Ranjan Srivastava, Hyunjung Kim
Summary: The selective separation of cobalt versus nickel from an HCl leached solution of spent lithium-ion batteries using a green ionic liquid has been developed, achieving a cobalt recovery rate of over 99%.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Environmental
Sadia Ilyas, Rajiv Ranjan Srivastava, Hyunjung Kim
Summary: A cradle-to-cradle recycling process for post-consumer NMC batteries was demonstrated, achieving a focused separation of cobalt over nickel using an ionic liquid. The optimized conditions resulted in over 99% cobalt extraction in the organic phase with a separation factor of 1097. The extracted cobalt was stripped and crystallized to obtain high-purity CoCl2•xH2O crystals. Similarly, around 99% nickel was extracted from the Co-depleted solution using acetophenone, and the stripped nickel was crystallized to yield high-purity NiSO4•6H2O crystals. The recycled products were further used to synthesize a new ternary precursor, showing similar electrochemical behavior and compatibility with precursors made from virgin materials. The overall recycling process was determined to be suitable for sustainable development with a sustainable process index value of 0.0006 cap.t-1.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Allan Gomez-Flores, Scott A. Bradford, Li Cai, Martin Urik, Hyunjung Kim
Summary: In this study, a comprehensive Alpha database was built from experimental data and a machine learning model was developed to predict Alpha. The accuracy of the model was verified through training and validation. The model also evaluated the significance of 22 input variables.
Review
Geochemistry & Geophysics
Rajiv Ranjan Srivastava, Dilip Kumar Rajak, Sadia Ilyas, Hyunjung Kim, Pankaj Pathak
Summary: The incessant generation and mismanagement of industrial waste, resource scarcity, and environmental degradation have led to the unsustainability of human life. Industrial waste, regardless of its hazardous nature, is often open dumped, resulting in adverse environmental and health impacts. However, this waste can be recycled and help alleviate resource scarcity.
Review
Metallurgy & Metallurgical Engineering
Levie Mweene, Allan Gomez-Flores, Hee-Eun Jeong, Sadia Ilyas, Hyunjung Kim
Summary: Nickel, a strategic element, has seen an increase in production and consumption of over 39% and 71% in the past decade. This article reviews the current methods of extracting nickel from laterites, which are the main source of nickel, and proposes potential future directions. The study finds that using a selective comminution-classification method followed by flocculation-flotation strategy can increase both the recovery and grade of nickel. The findings could be used to improve production and meet demand.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2023)
Editorial Material
Microbiology
Chunqiao Xiao, Chunli Zheng, Yanfei Zhang, Huan He, Sadia Ilyas
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Sadia Ilyas, Rajiv Ranjan Srivastava, Suhyeon Jin, Hyunjung Kim
Summary: In this study, the complete separation of copper over nickel from an ammoniacal leach liquor of nickel laterite ore was achieved using a combination of phenolic oxime (LIX 84-IC) and tributyl phosphate (TBP). The antagonistic effect of TBP was confirmed by the distribution coefficients and negative increment D values. The highest separation was obtained at a molar ratio of LIX 84-IC:TBP = 0.4:0.6 and an organic-to-aqueous phase ratio of 1, with a separation factor (beta(Cu/Ni)) of >1329.
GEOSYSTEM ENGINEERING
(2023)
Article
Engineering, Environmental
Allan Gomez-Flores, Scott A. Bradford, Gilsang Hong, Hyunjung Kim
Summary: The aggregation attachment efficiency (alpha) is the fraction of particle-particle collisions resulting in aggregation. Despite significant research, alpha predictions have not accounted for the full complexity of systems due to constraints imposed by particle types, dispersed matter, water chemistry, quantification methods, and modeling. Experimental alpha values are often case-specific, and simplified systems are used to rule out complexity. Building a comprehensive alpha database can enable the development of more accurate empirical models for prediction.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Wonhong Song, Sowon Choi, Hyunjung Kim, Sadia Ilyas
Summary: Waste recycling is important due to environmental regulations and the depletion of critical resources. The recycling of lithium from waste saggar is crucial because of the high supply-risk of lithium. In this study, different additives and temperatures were examined for the leaching of lithium from waste saggar, and NaOH was found to be the most efficient for extraction and recovery.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Rajiv Ranjan Srivastava, Sadia Ilyas, Dilip Kumar Rajak, Ji-hye Yang, Hyunjung Kim
Summary: Waste cathode ray tubes (CRT) have the potential to recycle rare earth resources through an efficient recycling process. This study found that removing zinc from a CRT during microwave roasting can affect the mineral phases of rare earths. By adjusting parameters such as acid medium, concentration, temperature, and time, high leaching efficiency can be achieved, leading to the production of high-purity (Y,Eu)2(C2O4)3 salt.
Proceedings Paper
Engineering, Chemical
Sadia Ilyas, Hyunjung Kim, Ijaz Ahmad Bhatti, Humma Akram Cheema, Rajiv R. Srivastava
Summary: In this study, the hydrometallurgical separation of refractory metals molybdenum and rhenium from molybdenite flue-dust leach liquor was successfully carried out using liquid-liquid extraction technique. The potential organic extractant, tri-butyl phosphate (TBP), effectively separated rhenium at a low pH(eq) and achieved >99% recovery at a stripping pH of >= 3.0.
RARE METAL TECHNOLOGY 2022
(2022)
