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Showing 1 to 20 of 37 for “"sorption isotherms"”.
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An experimental apparatus for the measurement of sorption isotherms of moisture in porous building materials
… apparatus and test procedure to measure the sorption isotherm of moisture in porous building materials was developed and tested for its reliability and accuracy. The apparatus shows excellent potential for determining reliable moisture storage property data. The data are used in heat and …
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Development and Comparison of 17beta-Estradiol Sorption Isotherms for Three Agriculturally Productive Soils From Different Physiographic Regions in Virginia
… goal of this research was to quantify the sorption of 17beta-estradiol to three soils considered to be agriculturally productive from different physiographic regions in Virginia to aid in modeling the concentration of estrogens available for transport in runoff from agricultural fields. …
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Determination of Chemical Activity of Soybean Proteins and Amino Acid Model Systems From NMR Relaxation Data in Relation to Water Sorption Isotherms
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1994.
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Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials
… based materials are closely related to moisture sorption and moisture transport properties. Therefore, it is important to study these properties, both theoretically and practically. This work is an experimental investigation in this field. Nowadays, the cement industry produces cements with …
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Comparison of the new vapor sorption analyzer to the traditional saturated salt slurry method and the dynamic vapor sorption instrument
… the water activity (aw) concept is the moisture sorption isotherm, which plots the moisture content of a material as a function of aw at the same temperature. Moisture sorption isotherms are useful for a variety of processing and product stability applications. The most common methods of …
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Investigation of Moisture Sorption Properties of Food Materials Using Saturated Salt Solution and Humidity Generating Techniques
… salt solution method and the new automated water sorption instruments with the Dynamic Vapor Sorption instrument as a representative instrument for obtaining moisture sorption isotherms, and (B) Explore additional applications of humidity generating instruments with the Dynamic Vapor Sorption …
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Equilibrium moisture content measurement for porous building materials at various temperatures
Sorption isotherms and scanning data were obtained for three test materials at three different temperatures. These data resulted from further investigating the operating range of an existing experimental apparatus and procedure. During the course of the research, the operating range and control of …
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The Role of Carbonaceous Materials in Pavement Dust, Soils, and Lake Sediments on the Fate of Organic Pollutants in Small Urban Watersheds
… 13C nuclear magnetic resonance spectroscopy. Sorption isotherms of phenanthrene to these fractions and bulk samples fitted with Freundlich models are nearly linear (N = 0.90--1.00), suggesting a partitioning-dominated mechanism which likely is attributed to the sorption contribution from …
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Effect of surfactants on the sorption and transport of Cu(II) in a sandy soil : batch, column experiments and modeling
… column studies were conducted to investigate the sorption processes and transport behavior of Cu(II) in a sandy soil in the presence of surfactants. SDS (sodium dodecyl sulfate) and Triton X-100 were chosen as representatives of an anionic surfactant and a nonionic surfactant, respectively. …
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Equilibrium studies of ion sorption on zeolitized tuff from Rainier Mesa, Nye County, Nevada
… were performed to investigate the equilibrium sorption of Pb(II), Sr(II), CrO{dollar}\sb4\sp{2-}{dollar} and SeO{dollar}\sb3\sp{2-}{dollar} ions on zeolitized tuff from Rainier Mesa, Nevada, and on clinoptilolite from Jordan Valley, Oregon. The fractional uptake of the ions on the zeolitized …
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Concrete at high temperatures: hygro-thermo-mechanical degradation of concrete
… model. A novel alternative formulation for sorption isotherms, that is applicable to both normal and high strength concrete, is developed. Furthermore, the effect of the slip flow effect is included and several state equations, including relative permeability and saturation vapour pressure, …
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Moisture redistribution in screeded concrete slabs
… of redistribution is presented. In addition, sorption isotherms including scanning curves were determined in a sorption balance for materials used in the floor constructions, viz, w/c 0.65 concrete, w/c 0.4 concrete, w/c 0.55 cement mortar, and Floor 4310 Fibre Flow, a self leveling flooring …
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The deposition of silica on titanium dioxide surfaces
… and nitrogen, argon and water sorption. Nitrogen and argon adsorption isotherms have been analysed using the equation of Brunauer, Emmett and Teller (BET). Differential energies of adsorption of nitrogen and argon have been determined calorimetrically. Water sorption isotherms …
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Design of isostructural metal-imidazolate frameworks : application for gas storage
… owing to their large capacity for the adsorption of gases and their structural and chemical tunability. The ability to rationally select the framework components is expected to allow the affinity of the internal pore surface toward CO2 to be precisely controlled, facilitating materials …
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Cadmium removal and sorption by benthic microbial biomats and potential applications for a contaminated watershed in the Arequipa region of southern Peru
… metal for treatment with wetland microcosms and sorption using biomat material from the Prado Wetlands in Orange County, California, and the Mines Park wetland reactor at Colorado School of Mines. The two types of biomat were characterized for organic content as volatile suspended solids which …
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Phosphorus Retention and Fractionation in Masonry Sand and Light Weight Expanded Shale Used as Substrate in a Subsurface Flow Wetland
… The objectives of this study were to: (i) use sorption isotherms to estimate the P sorption capacity of the two materials, masonry sand and light weight expanded shale; (ii) describe dissolved P removal in small (2.7 m3) subsurface flow wetlands; (iii) quantify the forms of P retained by the …
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Optimizing the structure and plasticization resistance of asymmetric polyimide hollow fiber membranes for CO2 removal from natural gas
… based on the nucleation and growth and dual mode sorption model to gain a comprehensive understanding of the plasticization phenomenon and to link the bridge between membrane formation mechanisms with membrane morphology and plasticization phenomenon. Gas sorption tests were performed on the …
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Moisture Buffering in the Indoor Environment
… the indoor environment is the ability, through absorption and desorption, of surface materials to attenuate the moisture variations of the indoor air. Moisture buffering plays an important role in understanding the risks for biological growth in surface materials in the indoor environment, e.g., …
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The role of soil clays and clay-humic complexes in processes controlling colloidal stability and the sorption and degradation of tetracyclines
… and humic substances and their interactions on sorption and desorption of tetracyclines. Tetracyclines are important in human medicine and are also used extensively in livestock production. Chlortetracycline and tetracycline are routinely used for growth promoting and therapeutic purposes in …
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