A simple new method of characterization porous materials is developed in this paper. In method, we combine the traditional Kelvin equation with an improved statistical adsorbed film thickness to account for finite dimension pores. The adsorption process a pore viewed as molecular layering followed by filling mechanism. Here, argue that mechanism valid not just mesopores but also micropores because our allowance be function only pressure size well. model tested against data nitrogen onto...

Landfills are the primary endpoint for disposal of PFAS-laden waste, which subsequently releases PFAS to surrounding environments through landfill leachate. Ozone foam fractionation emerges as a promising technology removal address issue. This study aims (i) assess effectiveness ozone system remove from leachate, and (ii) quantify equilibrium adsorption onto gas-water interface bubbles, followed by comparison with air fractionation. The results show that is effective more than 90% long-chain...

Unmanned aerial vehicles (UAVs) have been widely deployed in many applications such as transportation, data collection, monitoring, or tracking objects. Nowadays, numerous missions require UAVs to operate a large area complete stringent period of time. Using s

Surfactants are centrally important in many scientific and engineering fields used for purposes such as foaming agents detergents. However, challenges remain providing a comprehensive understanding of their behavior. Here, we provide brief historical overview the study surfactant adsorption at air–water interface, followed by discussion some recent advances this area from our group. The main focus is on incorporating an accurate description layer thickness interface. have wide distribution...

Flotation of water-soluble KCl and NaCl minerals in brines is significant for K-fertilizer production, but its mechanism controversial. Dissolved salt ions are expected to change the physicochemical properties solvents, interfaces, collector colloids, thereby affecting flotation significantly.Flotation experiments crystals were conducted using potassium sodium laurates as collectors. Contact angle (CA) surface tension measurements, X-ray photoelectron spectroscopy (XPS) analysis, molecular...

The development of unmanned aerial vehicles (UAVs) has become a revolution in the fields data collection, surveying, monitoring, and tracking objects field. Many control navigation algorithms are experimented deployed for UAVs, especially quadrotors. Recent numerous approaches ge

Compact gas inclusion in hydrates presents not only fascinating science but also wide-ranging applications sustainable energy and environmental technologies. The surface of dictates many essential phenomena underlying hydrate-based processes such as hydrate nucleation growth, mass transfer, heat agglomeration, adhesion, adsorption. Thus, falls within the core engineering. This paper covers an insight perspective on related to research development We present insightful molecular views...

In recent years, the development of Surface Enhanced Raman Spectroscopy (SERS) substrates has seen significant advancement. this research, we successfully fabricated cotton swab-based SERS using a facile solution-based method. Our showed not only ultrasensitive detection capability but also impressive long-term stability and multiple recyclability rounds. particular, reported limit 10-12 M RhB detectable concentration thiophanate methyl as low 10-10 our substrates. The reached 12-month mark,...

In recent years, the development of surface-enhanced Raman spectroscopy (SERS) substrates has seen significant advancement. this research, we successfully fabricated cotton swab-based SERS using a facile solution-based method. Our showed not only ultrasensitive detection capability but also impressive long-term stability and multiple recyclability rounds. particular, reported limit 10–12 M RhB detectable concentration thiophanate methyl as low 10-10 our substrates. The reached 12-month mark,...

The Gibbs adsorption equation has been indispensable in predicting the surfactant at interfaces, with many applications industrial and natural processes. This study uses a new theoretical framework to model air/water interface without equation. was applied two surfactants, C14TAB C16TAB, determine maximum surface excesses. obtained values demonstrated fundamental change, which verified by simulations, molecular arrangement interface. insights, combination recent discoveries field, expose...

This study investigated the relationship between molecular arrangement and surface tension of water mixtures with methanol ethanol. It has been found that structure interfacial zone was deterministically correlated to alcohol concentration. From dipole moment, an boundary defined. The then used calculate alcohols in zone, which tension. prediction from simulated data closely followed experimental data. analysis revives relevance arrangement, had main focus early 20th century, quantification...

A technique for determining micro-mesopore size distribution developed by Nguyen and Do [Nguyen, C.; Do, D. Langmuir 1999, 15, 3608] is tested with nitrogen adsorption data at 77 K benzene near ambient temperatures of two carbonaceous samples. The PSD results using are compared the obtained from DFT technique. In general, they agree very well each other, though sharper micro mesopore peaks observed our results. PSDs derived practically independent temperature, reinforcing assertion that...

Alcohols are a significant group of surfactants which have been employed extensively in industry to improve the interfacial effects. Recently, change surface potential (ΔV) two isomeric hexanols, methyl isobutyl carbinol (MIBC) and 1-hexanol, was investigated by using an ionizing (241)Am electrode. It clearly showed opposite effects between MIBC 1-hexanol zone: one enhanced presence cations, whereas other anions. This study employs molecular dynamics simulation provide new insights into...

The synergistic adsorption of a binary surfactant mixture was investigated by tensiometry and neutron reflectometry. results directly contradicted the conventional Gibbs equation. accompanied molecular simulation demonstrated multilayer arrangement at synergic conditions, with three distinctively oriented water layers. positive synergism can be explained considering relationship between orientation surface tension, in similar manner to Langmuir's proposal 1920s. In spite supporting evidence,...

The adsorption of heavy metal ions such as Pb(II) onto negatively charged minerals silica is expected to alter the structure and interactions at silica/aqueous interfaces. Besides solution pH, inner-sphere sorption regulate surface charge/potential, hypothesized control actions monovalent anions in aqueous environment. These complex pictures can be probed directly using surface-sensitive sum-frequency generation (SFG) spectroscopy. pH-dependent water within double layer interfaces under...

ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTAdsorption of Benzene and Ethanol on MCM-41 MaterialC. Nguyen, C. G. Sonwane, S. K. Bhatia, D. D DoView Author Information Chemical Engineering Department University Queensland, Brisbane, QLD 4072, Australia Cite this: Langmuir 1998, 14, 17, 4950–4952Publication Date (Web):July 25, 1998Publication History Received4 November 1997Revised29 May 1998Published online25 July inissue 1 August...

New concepts are introduced in this paper to account for the enhancement of potential energy interaction between adsorbate molecules and surface atoms within pore interior. With these concepts, a structure based model is developed describe adsorption equilibria heterogeneous activated carbon. The requires only molecular properties adsorbent, structural heterogeneity accounted with distribution micropore size. This validated data nitrogen methane on carbonaceous materials under supercritical...