Review and reproducibility of forming adsorbed layers from solvent washing of melt annealed films

Soft Matter ◽  
2020 ◽  
Vol 16 (23) ◽  
pp. 5366-5387 ◽  
Author(s):  
Michael F. Thees ◽  
Jennifer A. McGuire ◽  
Connie B. Roth
Keyword(s):  
Adsorbed Layers ◽  
Solvent Washing

Efforts to reproduce the “Guiselin’s experiment” procedure finds hads(t) curves to be far less reliable than implied in the literature, being strongly dependent on solvent washing conditions, consistent with how adsorption in solution is understood.

Anaerobic treatment of soil wash fluids from a wood preserving site

1998 ◽  
Vol 38 (7) ◽  
pp. 63-72 ◽  
Author(s):  
K. M. Miller ◽  
M. T. Suidan ◽  
G. A. Sorial ◽  
A. P. Khodadoust ◽  
C. M. Acheson ◽  
...  
Keyword(s):  
Soil Washing ◽  
Anaerobic Treatment ◽  
Integrated System ◽  
Waste Stream ◽  
Adsorptive Capacity ◽  
Anaerobic Conditions ◽  
Washing Process ◽  
Polycyclic Aromatic ◽  
Treatment Technologies ◽  
Solvent Washing

An integrated system has been developed to remediate soils contaminated with pentachlorophenol (PCP) and polycyclic aromatic hydrocarbons (PAHs). This system involves the coupling of two treatment technologies, soil solvent washing and anaerobic biotreatment of the extract. Specifically, this study evaluated the effectiveness of the granular activated carbon (GAC) fluidized-bed reactor to treat a synthetic waste stream of PCP and four PAHs (naphthalene, acenaphthene, pyrene, and benzo(b)fluoranthene) under anaerobic conditions. This waste stream was intended to simulate the wash fluids from a soil washing process treating soils from a wood preserving site. The reactor achieved a removal efficiency of greater than 99.8% for PCP with conversion to its dechlorination intermediates ranging from 47% to 77%. Effluent, carbon extraction, and isotherm data also indicate that naphthalene and acenaphthene were removed from the liquid phase with efficiencies of 86% and 93%, respectively. Effluent levels of pyrene and benzo(b)fluoranthene were extremely low due to the adsorptive capacity of GAC for these compounds. Experimental evidence does not suggest that these compounds were chemically transformed within the reactor.

Acetylene chemisorption at palladium: Effect of temperature and structure of the surface

1984 ◽  
Vol 49 (6) ◽  
pp. 1448-1458
Author(s):  
Josef Kopešťanský
Keyword(s):  
Work Function ◽  
Atomic Hydrogen ◽  
Effect Of Temperature ◽  
Thermally Stable ◽  
Template Effect ◽  
Temperature Range ◽  
Adsorbed Layers ◽  
Different Types ◽  
Adsorption Complexes ◽  
Low Coverage

The effect of temperature and structure of the palladium surfaces on acetylene chemisorption was studied along with the interaction of the adsorbed layers with molecular and atomic hydrogen. The work function changes were measured and combined with the volumetric measurements and analysis of the products. At temperature below 100 °C, acetylene is adsorbed almost without dissociation and forms at least two different types of thermally stable adsorption complexes. Acetylene adsorbed at 200 °C is partly decomposed, especially in the low coverage region. Besides the above mentioned effects, the template effect of adsorbed acetylene was studied in the temperature range from -80° to 25 °C. It has been shown that this effect is a typical phenomenon of the palladium-acetylene system which is not due to surface impurities.

scholarly journals Adsorption in Mixtures with Competing Interactions

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4532
Author(s):  
Marek Litniewski ◽  
Alina Ciach
Keyword(s):  
Short Range ◽  
Selective Adsorption ◽  
Similar Amount ◽  
Particle Interactions ◽  
Near Surface ◽  
Gas Density ◽  
Short Range Repulsion ◽  
Adsorbed Layers ◽  
Dynamics Simulations ◽  
Oppositely Charged

A binary mixture of oppositely charged particles with additional short-range attraction between like particles and short-range repulsion between different ones in the neighborhood of a substrate preferentially adsorbing the first component is studied by molecular dynamics simulations. The studied thermodynamic states correspond to an approach to the gas–crystal coexistence. Dependence of the near-surface structure, adsorption and selective adsorption on the strength of the wall–particle interactions and the gas density is determined. We find that alternating layers or bilayers of particles of the two components are formed, but the number of the adsorbed layers, their orientation and the ordered patterns formed inside these layers could be quite different for different substrates and gas density. Different structures are associated with different numbers of adsorbed layers, and for strong attraction the thickness of the adsorbed film can be as large as seven particle diameters. In all cases, similar amount of particles of the two components is adsorbed, because of the long-range attraction between different particles.

Increased transmission of a thin gold film by adsorbed layers of dye molecules

2002 ◽  
Vol 80 (20) ◽  
pp. 3715-3717 ◽  
Author(s):  
Ulrich C. Fischer ◽  
Eugene Bortchagovsky ◽  
Jörg Heimel ◽  
René T. Hanke
Keyword(s):  
Gold Film ◽  
Dye Molecules ◽  
Thin Gold Film ◽  
Adsorbed Layers

Thickness of Adsorbed Layers of High Molecular Weight Polyelectrolytes Studied by Ellipsometry

Langmuir ◽  
1995 ◽  
Vol 11 (7) ◽  
pp. 2621-2625 ◽  
Author(s):  
Lars Oedberg ◽  
Sussan Sandberg ◽  
Stefan Welin-Klintstroem ◽  
Hans Arwin
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Adsorbed Layers

Demethanation Trend of Hydrochar Induced by Organic Solvent Washing and Its Influence on Hydrochar Activation

2017 ◽  
Vol 51 (18) ◽  
pp. 10756-10764 ◽  
Author(s):  
Xiangdong Zhu ◽  
Yuchen Liu ◽  
Feng Qian ◽  
Zhongfang Lei ◽  
Zhenya Zhang ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Solvent Washing

Competing polymer–substrate interactions mitigate random copolymer adsorption

Soft Matter ◽  
2018 ◽  
Vol 14 (35) ◽  
pp. 7204-7213 ◽  
Author(s):  
Mary J. B. Davis ◽  
Biao Zuo ◽  
Rodney D. Priestley
Keyword(s):  
Random Copolymer ◽  
Polymer Substrate ◽  
Compositional Heterogeneity ◽  
Substrate Interactions ◽  
Adsorbed Layers ◽  
Individual Polymer

Compositional heterogeneity introduces a competition between individual polymer–substrate interactions that limits the growth of irreversibly adsorbed layers.

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