Article
Physics, Fluids & Plasmas
Nicolas Mujica, Scott Waitukaitis
Summary: Experiments have shown that charge distributions of granular materials are non-Gaussian, indicating the presence of many highly charged particles. Measurement uncertainties account for the previously observed tail broadening, as distributions measured at different electric fields have different tail sizes. By accounting for uncertainties, the true charge distribution without broadening is found to be non-Gaussian, with fewer highly charged particles. These findings have implications for granular behavior in natural settings where electrostatic interactions play a role.
Article
Geosciences, Multidisciplinary
Sotirios A. Mallios, Georgios Papangelis, George Hloupis, Athanasios Papaioannou, Vasiliki Daskalopoulou, Vassilis Amiridis
Summary: The study examines the attachment of positive and negative ions to settling spherical dust particles using a novel numerical model. The model calculates the modification of atmospheric ion densities, atmospheric electrical conductivity, and large-scale electric field in the presence of dust particles. While particles can acquire varying amounts of electrical charge and the electric field can increase significantly, the electrical force is not sufficient to significantly influence their gravitational settling.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Construction & Building Technology
Zhimin Li, Hongbo Liu, Futong Wang, Yang Hua, Pan Zhang
Summary: In this study, the mineralization and cementation of loose graphite tailings sands were achieved using microbially induced calcium carbonate precipitation (MICP) method. The experimental results demonstrate that the graphite tailings cured by MICP exhibit commendable wind erosion resistance, water retention, and sufficient strength, effectively controlling dust and reducing environmental pollution.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Uiyeong Jung, Sung-Seen Choi
Summary: The article discusses the abrasion of tire treads during driving, producing tire wear particles that combine with other particles on the road to form tire-road wear particles. The study of TRWPs is important for understanding tire wear behaviors and environmental contamination. TRWPs were found to have a rubber composition mainly consisting of NR/SBR or NR/BR/SBR blends.
Article
Engineering, Aerospace
I. Wells, J. Bussey, N. Swets, J. Leachman
Summary: Lunar regolith poses a threat to human health and equipment, so effective mitigation measures are needed. Cryogenic liquid sprays have been developed as a simple and convenient concept for dust mitigation in a lunar environment. However, the removal efficacy and material degradation under extreme cryogenic vacuum conditions are still unknown.
Article
Geosciences, Multidisciplinary
Jun Meng, Yue Huang, Danny M. Leung, Longlei Li, Adeyemi A. Adebiyi, Claire L. Ryder, Natalie M. Mahowald, Jasper F. Kok
Summary: Aircraft measurement campaigns have shown that super coarse dust, which accounts for approximately a quarter of aerosols by mass in the atmosphere, is often underestimated or not included in global aerosol models. To address this issue, a parameterization for the emitted dust size distribution, including super coarse dust, was developed using brittle fragmentation theory. Implementing this parameterization in the Community Earth System Model (CESM) improved the agreement with aircraft measurements in dust source regions, but underestimated super coarse dust in dust outflow regions. This suggests that the underestimation of super coarse atmospheric dust in the model is partly due to the underestimation of dust emission and potentially errors in deposition processes.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Shravan Kumar, Manish Kumar Jain
Summary: This study aimed to analyze the morphology, elemental composition, and identification of minerals and functional groups in household dust in Dhanbad, India. The study found that particles with different shapes and compositions were present in dust from different households, originating from coal combustion, LPG use, and vehicular emissions. Elemental analysis confirmed the presence of carbon, oxygen, magnesium, calcium, aluminum, and silicon in the dust samples. Infrared analysis revealed the presence of coal dust and combustion products, as well as the influence of household activities such as walking and cleaning. X-ray diffraction identified minerals such as calcite, quartz, dolomite, quartz, and hematite in the dust samples collected from different locations.
APPLIED GEOCHEMISTRY
(2022)
Article
Engineering, Chemical
Sotirios A. Mallios, Vasiliki Daskalopoulou, Vassilis Amiridis
Summary: This study investigates the impact of preferential particle orientation on aerodynamics and radiative transfer, finding that electric and aerodynamic torques play a significant role in aligning non-spherical dust particles. The research provides insights into the requirements for particle alignment based on electric field strength.
JOURNAL OF AEROSOL SCIENCE
(2021)
Article
Engineering, Environmental
Na Li, Jie Zhang, Hao Yu, Menghan Xu, Qian Feng, Jiayi Zhang, Xiaoyu Wang, Pengkun Wei, Yujuan Fan, Guangxuan Yan, Wei Zou, Zhiguo Cao, Li Li
Summary: This study investigated the load and size distribution patterns of dust/soil particles on the hands of different subpopulations and found differences in particle size distribution between groups. Preschoolers were more exposed to fine particles, while security guards were exposed to more coarse particles. There were also differences in particle loadings between genders. Preschoolers who had frequent hand contact with bare ground had higher dust/soil particle loadings compared to their peers.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Metallurgy & Metallurgical Engineering
S. Slouka, J. Brune, J. Rostami
Summary: This study investigates the characteristics of respirable dust generated from pick tips during rock excavation using mechanized mining and tunneling machines. The results show that moderately worn picks generate smaller particles and higher concentrations of dust compared to new picks, providing valuable information for operators to mitigate dust generation at its source.
MINING METALLURGY & EXPLORATION
(2022)
Article
Engineering, Mechanical
Tianye Jin, Zihao Lin, Bing Liu, Jin Zheng, Junyun Chen, Anmin Nie
Summary: The novel graphite/diamond composite material (Gradia) possesses ultrahardness, toughness, and semiconductive properties. However, the difference in mechanical properties between its diamond and graphite components makes surface finishing challenging. This study investigated the material removal characteristics of Gradia through experiments and molecular dynamic simulations. The results showed that the main mechanism of phase transformation during mechanical polishing was amorphization, as the graphite and diamond phases of Gradia interconverted under mechanical action. This study also demonstrated the creation of a Gradia tool with a lower wear rate and an unusual self-lubricating characteristic due to the abrasion-induced generation of graphite.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Astronomy & Astrophysics
John Staunton, Frits Paerels
Summary: In this study, carbon in the interstellar medium is investigated using the spectrograph on the Chandra Observatory. A novel feature, strong extinction on the low-energy side of the neutral C 1s-2p resonance, indicative of scattering by graphite particles, is discovered in the spectrum of the blazar 1ES 1553+113. Evidence for characteristic particle radii of order 0.1-0.15 micrometers is found. If the explanation for the feature is correct, the limits on the mass of carbon imply partially aligned grains and intrinsic polarization of the X-rays from the source.
ASTROPHYSICAL JOURNAL
(2023)
Article
Geochemistry & Geophysics
Lei Pan, Sean Golden, Shoeleh Assemi, Marc Freddy Sime, Xuming Wang, Yuesheng Gao, Jan Miller
Summary: Respirable coal mine dust particles, especially the nano-sized fraction, can cause severe lung diseases in coal miners, and the characterization of these particles in terms of size and chemical composition is still ongoing.
Article
Metallurgy & Metallurgical Engineering
Inoka E. Perera, Marcia L. Harris, Michael J. Sapko
Summary: Experiments showed that wetted and subsequently dried rock dust becomes a solid cake, but in order to effectively prevent coal dust explosions, rock dust must disperse as individual particles. To address this issue, rock dust manufacturers developed treated products that resist caking even after exposure to moisture for extended periods. Anti-caking additives such as stearic acid and oleic acid were found to significantly improve the dispersibility of rock dust after exposure to moisture.
MINING METALLURGY & EXPLORATION
(2021)
Article
Geology
Tamar Richards-Thomas, Cheryl McKenna-Neuman, Ian M. Power
Summary: Volcaniclastic dust particles from Iceland are characterized by substantial quantities of amorphous glass, large internal voids, and dustcoats comprised of nano-scale flakes. Their high porosity, which increases with particle diameter, generates lower particle densities than expected for solid spheres, potentially leading to a five-fold increase in expected residence time.
Article
Nuclear Science & Technology
Benjamin P. Keller, Shawn E. Nelson, Kyle L. Walton, Tushar K. Ghosh, Robert V. Tompson, Sudarshan K. Loyalka
NUCLEAR ENGINEERING AND DESIGN
(2015)
Article
Nuclear Science & Technology
Raymond S. Troy, Robert V. Tompson, Tushar K. Ghosh, Sudarshan K. Loyalka, Nidia C. Gallego
NUCLEAR TECHNOLOGY
(2015)
Article
Nuclear Science & Technology
Christopher B. Azmeh, Kyle L. Walton, Tushar K. Ghosh, Sudarshan K. Loyalka, Dabir S. Viswanath, Robert V. Tompson
NUCLEAR TECHNOLOGY
(2016)
Article
Nuclear Science & Technology
Naphtali M. Mokgalapa, Tushar K. Ghosh, Robert V. Tompson, Sudarshan K. Loyalka
NUCLEAR TECHNOLOGY
(2016)
Article
Thermodynamics
Jonathan L. King, Hangjin Jo, Sudarshan K. Loyalka, Robert V. Tompson, Kumar Sridharan
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2017)
Article
Nuclear Science & Technology
Tristan S. Hunnewell, Kyle L. Walton, Sangita Sharma, Tushar K. Ghosh, Robert V. Tompson, Dabir S. Viswanath, Sudarshan K. Loyalka
NUCLEAR TECHNOLOGY
(2017)
Article
Nuclear Science & Technology
Fernando De La Torre Aguilar, Nathan E. White, Mark A. Prelas, Robert V. Tompson, Sudarshan K. Loyalka
PROGRESS IN NUCLEAR ENERGY
(2017)
Article
Nuclear Science & Technology
Naphtali M. Mokgalapa, Tushar K. Ghosh, Robert V. Tompson, Sudarshan K. Loyalka
NUCLEAR TECHNOLOGY
(2018)
Article
Nuclear Science & Technology
Robert J. Schott, Charles L. Weaver, Mark A. Prelas, Kyuhak Oh, Jason B. Rothenberger, R. V. Tompson, Denis A. Wisniewski
NUCLEAR TECHNOLOGY
(2013)
Article
Nuclear Science & Technology
Thomas R. Boyle, Robert V. Tompson, Sudarshan K. Loyalka, Tushar K. Ghosh, Michael L. Reinig
NUCLEAR TECHNOLOGY
(2013)
Review
Nuclear Science & Technology
Kyle L. Walton, Tushar K. Ghosh, Dabir S. Viswanath, Sudarshan K. Loyalka, Robert V. Tompson
PROGRESS IN NUCLEAR ENERGY
(2014)
Article
Nuclear Science & Technology
Kyle L. Walton, Raymond K. Maynard, Tushar K. Ghosh, Robert Tompson, Dabir S. Viswanath, Sudarshan K. Loyalka
NUCLEAR TECHNOLOGY
(2019)
Article
Nuclear Science & Technology
Faten N. Al Zubaidi, Kyle L. Walton, Robert V. Tompson, Tushar K. Ghosh, Sudarshan K. Loyalka
NUCLEAR TECHNOLOGY
(2019)
Article
Nuclear Science & Technology
Faten N. Al Zubaidi, Kyle L. Walton, Robert Tompson, Tushar K. Ghosh, Sudarshan K. Loyalka
NUCLEAR TECHNOLOGY
(2019)