Article
Environmental Sciences
Jiahao Luo, Xin Jin, Yadong Wang, Pengkang Jin
Summary: This study evaluated the performance and mechanism of the electro-hybrid ozonation-coagulation (E-HOC) process for the removal of surfactants and microplastics from laundry wastewater. The results showed that under optimal conditions, the E-HOC process could achieve a removal efficiency of over 90% for both surfactants and microplastics. The E-HOC system was found to generate more reactive oxygen species (ROS), which greatly improved the removal of contaminants. Additionally, the analysis of microplastics in the wastewater revealed that they mainly consisted of fiber-shaped particles, with smaller particles (<50 μm) accounting for 46.9% and larger particles (>500 μm) only accounting for 12.4%. The abundance of microplastics in the laundry wastewater ranged from 440,000 to 1,080,000 items per 100 L. FT-IR analysis further identified polyethylene, nylon, and polyester as the predominant types of microplastics in the wastewater.
Article
Environmental Sciences
Swethaa Venkataraman, Vinoth Kumar Vaidyanathan
Summary: The study aims to synthesize magnetically separable highly active porous immobilized laccase for the removal of PCP. Magnetic porous CLEAs (Mp-CLEAs) of laccase were synthesized and showed a 2-fold higher biocatalytic efficiency compared to magnetic CLEAs. The Mp-CLEAs exhibited mechanical stability, enhanced catalytic efficiency, and reusability, overcoming mass transfer limitations and enzyme loss. Furthermore, a laccase-surfactant-mediator system was harnessed to enhance PCP removal, achieving high removal rates.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Applied
Wenhua Shi, Liujun Pei, Xiaomin Gu, Jiping Wang
Summary: Moisture-wicking fabrics are commonly used in sports due to their moisture absorption and perspiration functions. This study investigated the washing and decontamination of these fabrics, focusing on their performance and decontamination effects after washing. The results showed that moisture-wicking fabrics have a unique hexagonal cross-section and good hydrophilicity. The air permeability of the fabric increased after degreasing and thermosetting. There was a slight decrease in air permeability after one washing, but it had little effect on subsequent washing cycles. Additionally, the degreasing and thermosetting process improved stains removal.
TENSIDE SURFACTANTS DETERGENTS
(2023)
Article
Chemistry, Physical
Chang Peng, Zeyuan Kuai, Shanshan Lian, Xuezhi Li, Donglin Jiang, Yuhongnan Yang, Shu Chen, Ling Li
Summary: In this study, a photoreversible graphene oxide coumarin composite was fabricated, which could regulate its structure transformation under light irradiation and effectively adsorb heavy metal ions. The composite also demonstrated desirable adsorption capacities towards Cd2+, Cu2+, and Zn2+ ions, indicating its potential for wastewater treatment.
APPLIED SURFACE SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Yi Yang, Zhaodi Wu, Lili Ji, Shiyao Lu, Hua Jing, Jiaxing Sun, Jian Guo, Wendong Song, Yaning Wang, Lu Cai
Summary: The study modified porous biomass to have a lipophilic surface for environmentally friendly tableware cleaning material. Results showed that calcining at 1000 degrees Celsius yielded the best oil removal rate for the synthesized material.
JOURNAL OF RENEWABLE MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Jin-Ho Sung, Sumin Kim, Moonwon Kim, Yeawan Lee, Yong-Jin Kim, Bangwoo Han, Hak-Joon Kim
Summary: A two-stage electrostatic precipitator with reduced footprint, external ion-injection discharge, and water film on the collection plate was developed for long-term industrial operation. The addition of an extra collection plate and modifying the ionizer shape improved the PM removal efficiency and extended the operating time.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Environmental Sciences
Piero Ciccioli, Emanuele Pallozzi, Ettore Guerriero, Maria Adelaide Iannelli, Enrica Donati, Laura Lilla, Carmine Rinaldi, Paolo Svaldi, Paolo Ciccioli, Rosanna Mabilia
Summary: Residential air cleaners with different technologies are commonly used to remove air contaminants from indoor environments. The testing methods in the USA and Europe differ, with the USA using a large simulation chamber and anthropogenic emissions to generate pollution. In Italy, a smaller testing chamber was built, using smoke, dust, and diesel emissions. Two different air cleaning systems were tested for their performance.
Article
Energy & Fuels
Sung Wan Park, Jonghyun Lee, Hongkyu Yoon, Sangwoo Shin
Summary: This article explores the impact of high and low salinity water flooding on oil transport in porous media, finding that salinity change plays a crucial role in oil recovery rather than hydrodynamics. Studying the aggregation of oil drops under different salinity conditions reveals the existence of optimal salinity conditions to maximize oil recovery.
Article
Chemistry, Physical
Ennio Lavagnini, Joanne L. Cook, Patrick B. Warren, Christopher A. Hunter
Summary: New methods have been described to calculate DPD parameters directly from chemical structure, allowing for a wider range of organic compounds to be simulated.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Multidisciplinary
Sumaira Yasmeen, Jaehong Yoon, Chan Hui Moon, Rizwan Khan, Houda Gaiji, Sangwoo Shin, Il-Kwon Oh, Han-Bo-Ram Lee
Summary: The study presents a method of self-synthesizing superhydrophobic surfaces using daily supplies by coating a substrate with liquid and sprinkling powders onto it. The mechanistic study reveals that capillary force drives the liquid solution into the porous channels within the powders, creating a 3D porous nanostructure resulting in a water contact angle over 160 degrees.
Article
Biochemical Research Methods
Viet Sang Doan, Sangwoo Shin
Summary: Nonuniform electroosmosis induced by water electrolysis creates pH gradients near the electrodes, leading to the formation of multiple vortices and a flow-driven colloidal band that can be potentially used in colloidal self-assembly and separation processes.
Article
Chemistry, Physical
Sam E. Griffiths, Nick Koumakis, Aidan T. Brown, Teun Vissers, Patrick B. Warren, Wilson C. K. Poon
Summary: This study investigated the addition of non-adsorbing polymers to colloidal suspensions, resulting in new phase behaviors and kinetic arrest due to depletion attraction. The gelation observed in the two-dimensional layer of colloids exhibited locally crystalline strands. The findings were compared with previous simulations and theories, showing substantial agreement.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Annalaura Del Regno, Patrick B. Warren, David J. Bray, Richard L. Anderson
Summary: Using coarse-grained dissipative particle dynamics simulations, we predict critical micelle concentrations in polydisperse surfactant mixtures and blends by fitting pseudo-phase separation models to aqueous solutions of binary surfactant mixtures. The approach avoids the need for expensive simulations of more complex multicomponent mixtures and demonstrates modest cooperativity in micelle formation in SLES surfactants with polydispersity in the ethoxylate spacer. The lowered CMC observed in commercial SLES samples is attributed to the presence of small amounts of unsulfated alkyl ethoxylates and/or traces of salt.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Multidisciplinary
Viet Sang Doan, SungGyu Chun, Jie Feng, Sangwoo Shin
Summary: The research on nanoparticle transport in collagen hydrogels revealed a nonmonotonic behavior where maximum diffusiophoretic mobility is observed at intermediate confinement, contrary to common expectations. This behavior is attributed to the interplay between multiple size-dependent effects, highlighting the potential for enhanced nanoparticle transport in physiologically relevant conditions under tight confinement, particularly for drug delivery in compressed tissues.
Article
Chemistry, Physical
Ennio Lavagnini, Joanne L. Cook, Patrick B. Warren, Christopher A. Hunter
Summary: Dissipative particle dynamics (DPD) simulations are used to verify the Setschenow relationship in nonionic surfactants with added salt. The optimized ion-specific interaction parameters show transferability and follow the same trends as the empirical Hofmeister series, providing a systematic method to parameterize the interactions between salt ion beads and surfactant beads.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
David J. Bray, Richard L. Anderson, Patrick B. Warren, Kenneth Lewtas
Summary: Developing a dissipative particle dynamics model to study the behavior of alkyl aromatic hydrocarbons under ambient conditions is important for understanding the properties of these industrially significant materials.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Biochemical Research Methods
Sangwoo Shin
Summary: DC electrokinetics enables the manipulation and assembly of colloidal particles, contributing to the understanding of life origin and the synthesis of new materials for various applications.
Article
Chemistry, Physical
Joseph C. R. Thacker, David J. Bray, Patrick B. Warren, Richard L. Anderson
Summary: We used advanced machine learning methods to explore the prediction of surfactant phase behavior, using a data set for twenty-three nonionic surfactants. Most machine learning classifiers tested were able to fill in missing data in a partially complete data set. However, strong data bias and a lack of chemical space information generally resulted in poorer results for entire de novo phase diagram prediction. Although some machine learning classifiers performed better than others, these observations were largely robust to the particular choice of algorithm. Finally, we examined how de novo phase diagram prediction can be improved by including observations from state points sampled by an analogy to commonly used experimental protocols. Our findings indicate the factors that should be considered when preparing for machine learning prediction of surfactant phase behavior in future studies.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Chemistry, Physical
Richard L. Anderson, Tseden Taddese, Ennio Lavagnini, Patrick B. Warren, David J. Bray, David S. D. Gunn
Summary: We propose a dissipative particle dynamics (DPD) model that can effectively describe the liquid state phase behavior of nonionic surfactants from the alkyl ethoxylate (CnEm) family. The model is an improved version based on previous work and incorporates molecular dynamics simulations to control the molecular structure more accurately. Our results show that changes to the surfactant geometry have minimal impact on the properties of micelles and water-octanol partition coefficients. With these modifications, the model successfully reproduces the binary water-surfactant phase behavior of nine surfactants with good accuracy.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Mechanics
Jesse T. Ault, Sangwoo Shin, Allan Garcia, Antonio Perazzo, Howard A. Stone
Summary: Glycerol is hygroscopic and its viscosity decreases as it absorbs water vapour from the atmosphere. Experimental measurements of glycerol viscosity in a rheometer show that it decreases with time as water is absorbed and transported within the glycerol. The rate of viscosity decrease has a non-monotonic relationship with the rheometer gap height.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Physics, Fluids & Plasmas
Viet Sang Doan, Dong-Ook Kim, Craig Snoeyink, Ying Sun, Sangwoo Shin
Summary: We study the diffusion and aggregation of ellipsoidal particles induced by ionic solute gradients. Contrary to the common assumption that diffusion and aggregation are independent of particle shape, we experimentally show that the shape of the particles can affect these processes when the thin Debye layer approximation is relaxed. By tracking the translation and rotation of different ellipsoids, we find that the phoretic mobility of ellipsoids is sensitive to their eccentricity and orientation relative to the solute gradient, and can exhibit nonmonotonic behavior under strong confinement. We demonstrate that modifying theories for spheres can easily capture the shape- and orientation-dependent diffusion and aggregation of colloidal ellipsoids.
Article
Physics, Fluids & Plasmas
Patrick B. Warren
Summary: This article critically examines the concept of the partial osmotic pressure of ions in an electrolyte solution. The individual partial osmotic pressures are found to be extrathermodynamic quantities dependent on the electrical structure at the wall, similar to attempts to define individual ion activity coefficients. The analysis also considers the case where the wall is a barrier to only one species of ion, recovering the classic Gibbs-Donnan membrane equilibrium and providing a unifying treatment.