Results 211 to 220 of about 39,051 (262)

Phosphate and sulfate adsorption on goethite: Single anion and competitive adsorption

Geochimica et Cosmochimica Acta, 1997
Abstract The adsorption of phosphate and sulfate on goethite is studied individually and in combination at solution concentrations of phosphate ranging from 10 −8 to 10 −4 M and of sulfate ranging from 10 −5 to 10 −3 M. For single anion adsorption the influence of pH, ionic strength, and anion:goethite ratio was determined.
Geelhoed, J.S., Hiemstra, T., van Riemsdijk, W.H.   +2 more
openaire   +1 more source

Competitive adsorption, displacement, and transport of organic matter on iron oxide: I. Competitive adsorption

Geochimica et Cosmochimica Acta, 1996
Different organic compounds or fractions of natural organic matter (NOM) show different adsorption affinities (K) and capacities (qm) on mineral surfaces. We hypothesize that these different organic compounds or fractions compete for adsorption when surface adsorption sites are limited.
Baohua Gu, Tonia L. Mehlhorn, Liyuan Liang, John F. McCarthy   +3 more
openaire   +1 more source

Random copolymer adsorption. II. Competitive and displacement adsorption

Macromolecules, 1989
Etude de l'adsorption de copolymeres (styrene-methacrylate de methyle) et des homopolymeres a partir de solutions dans le trichloroethylene sur la silice par spectrometrie FT-IR. Adsorption preferentielle des chaines de copolymere et de polymethacrylate par rapport au PS et les copolymeres riches en styrene.
Masami Kawaguchi, Katsunori Itoh, Satoshi Yamagiwa, Akira Takahashi   +3 more
openaire   +1 more source

Competitive Adsorption of Phenols on GAC. I: Adsorption Equilibrium

Journal of Environmental Engineering, 1993
The impact of the presence of molecular oxygen on multicomponent adsorption is evaluated in this study. Adsorption equilibria for binary mixtures of phenol/o‐cresol and ternary mixtures of phenol/o‐cresol/3‐ethylphenol on granular activated carbon (GAC) are determined at 23°C using three different initial‐concentration combinations.
George A. Sorial, Makram T. Suidan, Radisav D. Vidic, Stephen W. Maloney   +3 more
openaire   +1 more source

Compensation effect associated with multisite adsorption and competition for adsorption

Bulletin des Sociétés Chimiques Belges, 1979
AbstractAccording to a model of “landing site” for chemisorption of alkanes on metal in presence of H2, previously published, the hydrocarbon adsorption rate is proportional to a function G of the H coverage (ΘH). The observed variations with H2 pressure and temperature range of the temperature factor affecting the adsorption rate of CH4 and C2H6 may ...
L. Degols, A. Frennet, A. Crucq, G. Lienard   +3 more
openaire   +1 more source

Competitive Protein Adsorption—Multilayer Adsorption and Surface Induced Protein Aggregation

Langmuir, 2009
In this study, competitive adsorption of albumin and IgG (immunoglobulin G) from human serum solutions and protein mixtures onto polymer surfaces is studied by means of radioactive labeling. By using two different radiolabels (125I and 131I), albumin and IgG adsorption to polymer surfaces is monitored simultaneously and the influence from the presence ...
Maria, Holmberg, Xiaolin, Hou
openaire   +2 more sources

Competition between self-assembly and surface adsorption

The Journal of Chemical Physics, 2009
We investigate a minimal equilibrium polymerization model for the competition between self-assembly on a boundary and in solution that arises when an assembling system is in the presence of an adsorbing interface. Adsorption generally occurs upon cooling, but assembly (equilibrium polymerization) may arise either upon cooling or heating. Both cases are
Jacek, Dudowicz, Jack F, Douglas, Karl F, Freed   +2 more
openaire   +2 more sources

Competitive adsorption behavior of heavy metals on kaolinite

Journal of Colloid and Interface Science, 2005
Polluted and contaminated soils can often contain more than one heavy metal species. It is possible that the behavior of a particular metal species in a soil system will be affected by the presence of other metals. In this study we have investigated the adsorption of Cd(II), Cu(II), Pb(II), and Zn(II) onto kaolinite in single- and multi-element systems
Srivastava, Prashant., Singh, Balwant., Angove, Michael.   +2 more
openaire   +2 more sources

Nanoconfined competitive adsorption and wettability transition

Journal of Colloid and Interface Science
Adsorption-driven wettability transitions are fundamental to understanding fluid-solid interfacial phenomena and their impacts on diverse processes in nature and industry. In systems with multiple fluid species, competitive adsorption introduces additional complexity by altering interfacial energy and fluid behavior.
Wenzhen, Chu, Kaiqiang, Zhang
openaire   +2 more sources

Competitive and cooperative adsorption of arsenate and citrate on goethite

Journal of Environmental Sciences, 2009
The fate of arsenic in natural environments is influenced by adsorption onto metal (hydr)oxides. The extent of arsenic adsorption is strongly affected by coexisting dissolved natural organic acids. Recently, some studies reported that there existed competitive adsorption between arsenate and citrate on goethite. Humic acid is known to interact strongly
Rong, Shi, Yongfeng, Jia, Chengzhi, Wang
openaire   +2 more sources