Present study aims to investigate the efficiency of newly synthesized adsorbent polyvinyl alcohol-alginate bound nano magnetite microspheres modified with cetyltrimethyl ammonium bromide [PVAANM/CTAB] in removal of anionic dye ‘Alizarin Red S’ from aqueous medium. The effect of agitation time, influence of pH, amount of adsorbent, initial dye concentration and temperature were systematically studied by batch sorption system. Various isotherms and kinetic models have been fitted with...
Topics: Alizarin Red S, Nano magnetite, polyvinyl alcohol-alginate, sorption efficiency, sorption isotherm
Folkscanomy: General Academic Papers
95
95
Feb 11, 2014
02/14
by
Chuan-Pin Lee, Ming-Chee Wu, Tsuey-Lin Tsai, Hwa-Jou Wei, Lee-Chung Men, Chun-Nan Hsu
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This study focused on sorption of individual and coexisting Cs and Se on bentonite and quartz sand mixtures by batch techniques. Batch kinetic tests have been conducted with carrier free by using individual and coexisting radiotracers ,137Cs and 75Se. The distribution coefficients (Kd) of Cs on bentonite showed that there is no interference on sorption additivity between individual and coexisting value (366±3 and 371±10 mL/g in synthetic groundwater, 43±1 and 60±2mL/g in synthetic...
Topics: Sorption, Individual, Coexisting, Cesium, Selenium
Laboratory studies and pot Experiments were carried out to determine the optimum sulphur (S)fertilizer rate for groundnut production in selected soils of Benue state using sorption indices. Surface soil samples (0-20 cm) were collected for sorption studies and pot experiments. The sorption study was carried out by shaking known concentrations of S (0, 20, 40, 60, 80, 100 and 120 mgkg-1) with 5g soil sample. The suspension was filtered and the amount of S in solution determined. The amount of...
Topics: Sorption, Sulphur, Groundnut, Fertilizer, Indices.
Cellulose is of special interest due to its abundance in nature and it provides excellent materials for membranes both in native and derivatized forms. Graft copolymers of cellulose when used in separation and enrichment technologies have advantages over the conventional ones, due to chemical resistance, radiation stability and low cost of preparation. Cellulose based graft copolymers and hydrogels offer large hydrophilic area despite being insoluble in water and enrich or separate metal ion by...
Topics: Graft copolymer, post polymer reaction, sorption, cellulosics.
Effect of temperature and time on Lead (Pb) adsorption and affinity of the adsorbed Pb was evaluated in three acidic soils from China. The distribution coefficient increased slightly with increasing temperature up to 35 0C and then decreased at 450C.The increase of temperature was not favorable to sorption. The heat of reaction (△H) was positive (endothermic) at lower temperatures, while it was negative (exothermic) at higher temperatures. It was observed that there was an increase in the...
Topics: sorption, lead, variable charge soils, time, temperature.
Part of the research work carried out at our university is presented. Ag, Fe and ZnO nanoparticles are prepared by the lab made electro-exploding wire system. The prepared nanoparticles are utilized in water pollution treatment. Laboratory experiments have been designed for exploring the sorption properties of these nanoparticles for the removal of nitrite from water. Spectrophotometric method was used for the determination of nitrite in the concentration range of 0.05–2.5 mg/L. At fixed...
Topics: Exploding Wire, Nanoparticles, Nitrite Sorption, Water Treatment
In this study, the water vapour sorption of Belmadur wood is fully investigated. The sorption isotherms were analysed using the Hailwood-Horrobin model. Belmadur wood was shown lower total sorption by 26.5%, polymolecular sorption by 23.9% and monomolecular sorption by 33.1% at saturation, compared with the untreated wood. Regression analysis of the EMC values at saturation revealed that the variation shown in the water sorbed at the polymolecular level plays the main role...
Topics: Modification, Impregnation, Sorption, Belmadur Wood, HailwoodHorrobin Model, Dmdheu
Recently, the harmful impact of toxic metals in the aquatic environment cannot be over emphasized again. This work investigated the potential application of ginger root waste (GRW) to remove toxic cations (Cd 2+ and Pb 2+ ) from the aqueous medium. Batch adsorption examination was carried out as a function of sorbent dose, initial metal ion concentration, contact time, and temperature. The sorption equilibrium of the metal ions onto the GRW was subjected to Langmuir, Freundlich, Elovich and...
Topics: Ginger root waste, sorption, toxic cations, kinetics, thermodynamics
In recent years, a lot of attention has been directed towards metal hydrides. The reason being their ability to store hydrogen. Many attempts have been made to develop metal hydride based heating and cooling systems. The possibility to utilize low temperature heat (waste heat) to drive these systems has great potential, helping to reduce to pollution if implemented. Major applications are seen in air conditioning and heat supply for buildings and in air conditioning of automobiles. Although...
Topics: Air-Conditioning, Metal Hydride, PCT, Sorption, Thermal Cooling, Iaeme
In this study, the water vapour sorption of Belmadur wood is fully investigated. The sorption isotherms were analysed using the Hailwood-Horrobin model. Belmadur wood was shown lower total sorption by 26.5%, polymolecular sorption by 23.9% and monomolecular sorption by 33.1% at saturation, compared with the untreated wood. Regression analysis of the EMC values at saturation revealed that the variation shown in the water sorbed at the polymolecular level plays the main role in the variation in...
Topics: Modification, Impregnation, Sorption, Belmadur Wood, Hailwood-Horrobin Model, Dmdheu
In recent years, a lot of attention has been directed towards metal hydrides. The reason being their ability to store hydrogen. Many attempts have been made to develop metal hydride based heating and cooling systems. The possibility to utilize low temperature heat (waste heat) to drive these systems has great potential, helping to reduce to pollution if implemented. Major applications are seen in air conditioning and heat supply for buildings and in air conditioning of automobiles. Although...
Topics: Air-Conditioning, Metal Hydride, PCT, Sorption, Thermal Cooling, Iaeme
As climate change and water scarcity continue to be of concern, reuse of treated wastewater is an important water management strategy in many parts of the world, particularly in developing countries and remote communities. Many countries, especially in remote regional areas, use waste stabilisation ponds (WSPs) to treat domestic wastewater for a variety of end uses, including using the treated wastewater for irrigation of public spaces (e.g. parks and ovals) or for crop irrigation. Thus, it is...
Topics: Biodegradation, Organic micropollutants, Photodegradation, Sorption, Waste stabilisation ponds,...
The biosorption of copper (II) ions onto Luffa cylindrica was investigated. Luffa cylindrica, a biomaterial with wide distribution particularly in the tropical world, is characterized with the surface area, chemical bonds, bulk density, pore size distribution, microstructures, composition, morphology and elemental composition which are determined. Biosorption studies were carried out with varying dosage and the experimental data obtained were fitted to Pseudo-Second order kinetic model. The...
Topics: Sorption Capacity, Luffa Cylindrica, Biosorption, Mathematical Modelling, Artificial Neural Network
Bell System Technical Journal, 35: 5. September 1956 pp 1230-1232. Recent Monographs of Bell System Technical Papers Not Published in thisJournal.
Topics: monograph, monographs, attenuation, electrons, waveguide, spectral, acceptors, graph, reuability,...
The biosorption of copper (II) ions onto Luffa cylindrica was investigated. Luffa cylindrica, a biomaterial with wide distribution particularly in the tropical world, is characterized with the surface area, chemical bonds, bulk density, pore size distribution, microstructures, composition, morphology and elemental composition which are determined. Biosorption studies were carried out with varying dosage and the experimental data obtained were fitted to Pseudo-Second order kinetic model. The...
Topics: Sorption Capacity, Luffa Cylindrica, Biosorption, Mathematical Modelling, Artificial Neural Network
The characteristics of two cationic organic pharmaceutical compounds, Metoprolol and Atenolol have been simulated in laboratory experiments. The objective of the present research was to characterize the sorption of the two similar compounds onto natural sediment and to correlate the competition effect of the compounds with inorganic cations by means of column experiments. Tap water with additional of certain inorganic cations from salt solutions (Ca2+, Mg2+, K+, and Na+) was used as model water...
Topics: Cationic Organic Compound, Pollutant Behavior, Sorption, Pharmaceutical, Retardation, Atenolol,...
9
9.0
Sep 29, 2021
09/21
by
Hari, Vani, author
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xii, 369 pages ; 25 cm
Topics: Weight loss, Detoxification (Health), Weight Reduction Programs, Sorption Detoxification, Weight...
Bell System Technical Journal, 17: 3. July 1938 pp 483-485. Abstracts of Technical Articles from Bell System Sources.
Topics: loudness, masking, decibels, sorption, carrier, relation, discusses, repeaters, railroad,...
Journal of Research of the National Institute of Standards and Technology
Topics: volumetric contraction, adhesion, amorphous calcium phosphate, hydroxyapatite, methacrylate...
Persistent ores, which are characterized by insufficient gold recovery under traditional conditions of cyanide leaching, occupy a prominent place in resource base of the modern gold mining industry. Gold in such ores is in a state of fine dispersion in sulfide minerals, most often in pyrite and arsenopyrite. Refining refractory gold ores to enhance extraction at cyanidation involves pretreatment. Traditional technologies for extraction of gold from sulfide refractory ores include flotation...
Topics: Gold, Refractory Gold-Bearing Concentrate, Autoclave Oxidation, Bacterial Oxidation, Roasting,...
A regenerative adsorbent heat pump process and system for cooling and heating a space. A sorbent is confined in a plurality of compressors of which at least four are first stage and at least four are second stage. The first stage operates over a first pressure region and the second stage over a second pressure region which is higher than the first. Sorbate from the first stage enters the second stage. The sorbate loop includes a condenser, expansion valve, evaporator and the compressors. A...
Topics: NASA Technical Reports Server (NTRS), ADSORBENTS, HEAT PUMPS, SORPTION, PATENTS, Jones, Jack A....
794
794
Jul 21, 2010
07/10
by
Jones, R. M
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The investigation conducted at the Tennessee Valley Authority's Sequoyah Nuclear Power Plant to determine and correct increasing vibrations in the vertical reactor coolant pumps is described. Diagnostic procedures to determine the vibration causes and evaluate the corrective measures taken are also described.
Topics: MATHEMATICAL MODELS, SORPTION, THERMAL ANALYSIS, MODULES, SERVICE LIFE, VINYL POLYMERS, WATER,...
In this work, thermally expanded graphite and carbonized rice husk were obtained by heat treatment at different temperature conditions and different ratios. The samples were purified and characterized by physico-chemical methods. The synthesized samples were tested as oil sorbents in water. The results of determination of sorption capacity of thermally expanded graphite oil showed higher values (5-6%) compared to carbonized rice husks (3.1-3.7%). It should be noted that all samples of thermally...
Topics: Oil Spills, Oily Wastewater, Carbonized Rice Husk, Thermally Expanded Graphite, Sorption Capacity...
The objective of the program was to investigate materials that can be used in the cleanup of massive oil spills by sinking the oil. Laboratory tests were developed to evaluate the effectiveness of oil sinking materials under varying conditions. Tests were developed to determine: Optimum oil sinking material retention potential; Sinking efficiency; Dynamic retention capability; and Volatile loss-time characteristics of oil retained on glass wool. The tests developed are not applicable to Bunker...
Topics: DTIC Archive, Roshore, E C, *WATER POLLUTION, *OILS, *SORPTION, REMOVAL, TEST METHODS, SEA WATER,...
Multiple amendment active caps (MAACs) developed under this project for the remediation of contaminated sediments consist of a mixture of chemically active amendments combined with sand or other neutral materials such as clay or clean soil/sediment. The objectives of SERDP project (ER-1501) part II were 1) the development and evaluation of MAAC technology for sorption and desorption of contaminants, 2) prediction of contaminant release over time from MAAC formulations by numerical modeling, 3)...
Topics: DTIC Archive, SAVANNAH RIVER NATIONAL LAB AIKEN SC, *SOIL REMEDIATION, CONTAMINATION, DESORPTION,...
The Gd(+3)/H(+) ion exchange on a commercial zirconium phosphate ion exchanger was investigated in chloride, sulfate, and phosphate solutions of Gd(+3) at gadolinium concentrations of 0.001 to 1 millimole per cc and in the pH range of 0 to 3.5. Relatively low Gd(+3) capacities, in the range of 0.01 to 0.1 millimole per g of ion exchanger were found at room temperature. A significant difference in Gd(+3) sorption was observed, depending on whether the ion exchanger was converted from initial...
Topics: NASA Technical Reports Server (NTRS), GADOLINIUM, HYDROGEN IONS, ION EXCHANGING, SORPTION, Liu, D....
Different aspects of transfer through human skin are clarified. Water and water vapor are believed to move through intact skin surface by: (a) glandular secretion such as that of sweat glands, (b) sorption and desorption in the horny layer, (c) diffusion through the horny layer. With proper care all three avenues can be sufficiently well differentiated. Sweating can be partly controlled by low room temperature, atropine and selection of a body area not prone to sweating. Sweat amount is also...
Topics: DTIC Archive, WASHINGTON UNIV SEATTLE, *TRANSDERMAL ABSORPTION, AIR, FEET, MOISTURE, SECRETION,...
Adsorption experiments with GA-agent on activated carbon were completed at 30 and 45C in the 2-500 microgram per liter concentration range. The data were expressed in the form of Langmuir type adsorption isotherms. The adsorption of GA-agent on activated carbon is less than monomolecular. The effect of water vapor on the adsorbed quantities of GA agent was found to be negligible up to a 85% relative humidity, a slight reduction of adsorptive capacity of 5-25% occurs at humidities exceeding 85%...
Topics: DTIC Archive, MONSANTO RESEARCH CORP EVERETT MA, *TEMPERATURE, MEASUREMENT, ADSORPTION, CARBON,...
Topics: DTIC Archive, ARMY BIOLOGICAL LABS FREDERICK MD, *BACTERIOPHAGES, USSR, SENSITIVITY, X RAYS,...
By isolating contaminated sediments, capping can effectively reduce exposure to contaminants and the potential for contaminant transport into the food chain. However, typical sand caps have little sorption capacity to retard the transport of hydrophobic contaminants such as PAHs that can be mobilized by groundwater flow. The primary objective of this research was to develop and improve engineering tools for more efficient cap designs by enhancing the scientific understanding of organic...
Topics: DTIC Archive, MARYLAND UNIV BALTIMORE, *CONTAMINANTS, *SEDIMENTS, CAPPING, EXPOSURE(GENERAL), FOOD...
The environmental fate and biotic effects of contaminant trace metals in coastal bays, harbors and estuaries is a priority research concern for the United States Navy. We are carrying out field and laboratory studies to address these issues. The studies entail determining the chemical speciation (or equilibrium partitioning between different chemical forms) of potentially toxic trace metals, in particular Cu and Zn (but also Cd, Pb and Ni). Our studies emphasize the role of strong metal-binding...
Topics: DTIC Archive, CALIFORNIA UNIV SANTA CRUZ INST OF MARINE SCIENCES, *METALS, CHEMICALS, KINETICS,...
Journal of Research of the National Bureau of Standards
Topics: Gas thermometry, International Practical Temperature Scale of 1968, sorption, steam point,...
The diffusivities, D, of copper and silver in high purity lead have been measured by a radioactive tracer technique. The results, in combination with those of Seith and Keil and Ascoli et al., show that the rates of diffusion of the noble metals in lead are several orders of magnitude greater than the self diffusion rate of lead, D sub Pb. We have found that D sub Pb is not measurably affected by the dissolution of either gold, in agreement with Seith and Keil, or of copper. The results...
Topics: DTIC Archive, HARVARD UNIV CAMBRIDGE MA DIV OF ENGINEERING AND APPLIED PHYSICS, *COPPER, *SILVER,...
The paper gives a critical analysis of the basic positions and content of the Mecklenburg 'theory.' It is shown that this is an erroneous and pseudo-scientific theory.
Topics: DTIC Archive, Zhukhovitskii, A A, ARMY BIOLOGICAL LABS FREDERICK MD, *SORPTION, USSR, DYNAMICS,...
Mendeley Climate Change Library
51
51
Jul 6, 2019
07/19
by
Thanaphorn Detchusananard; Shivom Sharma; François Maréchal; Amornchai Arpornwichanop
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Biomass is one of the encouraging renewable energy sources to mitigate uncertainties in the future energy supply and to address the climate change caused by the increased CO 2 emissions. Conventionally, thermal energy is produced from biomass via combustion process with low thermodynamic efficiency. Conversely, gasification of biomass integrated with innovative power generation technologies, such as Solid Oxide Fuel Cell (SOFC), offers much higher conversion efficiency. Typically, energy...
Topics: CO 2 capture, Exergy analysis, Multi-objective optimization, Solid oxide fuel cell, Sorption...
The state-of-the-art of cryosorption of hydrogen (H2) and helium by cold cryodeposited frost is reviewed and summarized in some detail, and the results of additional measurements of the sorption of H2 by carbon dioxide (CO2) frosts are reported. It is shown that the sorption capacity of the frost depends upon the conditions at which the frost was formed and upon its temperature history. Frosts formed in a manner to make them porous or disordered are shown to possess greater sorption capacities....
Topics: DTIC Archive, Templemeyer, K E, ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN, *CRYOPUMPING,...
Chitosan is a biopolymer resulting from the deacetylation of chitin, the second most abundant biopolymer in nature. Chitosan has been successfully used in systems to remove metal ions and other pollutants from wastewater. Chitosan has shown promise as a sorbent for radionuclides in some aqueous waste streams.
Topics: DTIC Archive, OREGON STATE UNIV CORVALLIS, *PHYSICOCHEMICAL PROPERTIES, METALS, ORGANIC MATERIALS,...
Active or reactive capping, is the application of a relatively thin layer of reactive material to the sediment to physically and chemically reduce contaminant mobility and/or bioavailability. This project addressed high priority research needs related to developing/selecting active capping materials and cap designs for contaminant sequestration under a range of aquatic sediment conditions and assessing the ability of innovative amendments to immobilize a variety of organic and inorganic...
Topics: DTIC Archive, SAVANNAH RIVER NATIONAL LAB AIKEN SC, *CONTAMINANTS, *SEDIMENTS, *SORPTION,...
An investigation was made to increase the effectiveness of the CO2 Scrubber, currently used in nuclear submarines, to reduce the CO2 levels in the atmospheres. Redesigns of parts of the present unit could show appreciable increases in efficiency. To approach the desired level of 0.5% CO2 in the submarine atmosphere, a size redesign will be required. The data revealed that a redesign of the stripper on the present size unit could give nearly twice the current stripping efficiency.
Topics: DTIC Archive, Gadomski, Stanley T, NAVAL RESEARCH LAB WASHINGTON DC, *PURIFICATION, *CARBON...
Topics: DTIC Archive, Vorob'yeva,V Ya, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, *TETRACYCLINES,...
Contents: Influence of particle size and content of filler on tensile properties and shear moduli. Mechanical properties of highly filled elastomers. II. Appendices. Correlation between density and composition. Swelling in solvents. Numerical data of dynamic mechanical measurements of shear moduli.
Topics: DTIC Archive, CENTRAL LAB TNO DELFT (NETHERLANDS), *ELASTOMERS, DENSITY, PARTICLE SIZE, CHLORIDES,...
Efferent sorption methods of organism detoxication (by medical trend) are presented. Recently, specialists have shown their keen interest in the problem of treating exogenous and endogenous intoxications. This was stipulated by the growing production and accumulation of chemical products for industrial, agricultural, and domestic needs. To solve this problem the industrial production of carbon fibrous adsorbents was developed and implemented at NII Chimvolokno in St. Petersburg. A description...
Topics: NASA Technical Reports Server (NTRS), CARBON FIBERS, COMPOSITE MATERIALS, SORPTION, TOXIC DISEASES,...
A number of atmospheric phenomena affect the propagation of light. This article reviews the effects of clear-air turbulence as well as atmospheric turbidity on optical communications. Among the phenomena considered are astronomical and random refraction, scintillation, beam broadening, spatial coherence, angle of arrival, aperture averaging, absorption and scattering, and the effect of opaque clouds. An extensive reference list is also provided for further study, Useful information on the...
Topics: NASA Technical Reports Server (NTRS), OPTICAL COMMUNICATION, TURBULENCE EFFECTS, REFRACTION,...
On the basis of these animal experiments, it is concluded that comparative investigations on the effectiveness of aerosols with different animal species do not make it possible to make any comparisons. The problem involves not only a differentiation of aerosol sorption in the various animal species in terms of quantity but also a preferred sorption of certain aerosol fractions. This obvious difference is due not only to the physiological condition of the respiratory passages but also to the...
Topics: DTIC Archive, Oldiges, H, ARMY BIOLOGICAL LABS FREDERICK MD, *AEROSOLS, *RESPIRATION, PARTICLE...
The economics of surfactant enhanced subsurface remediation are affected by losses of surfactants due to such phenomena as precipitation, sorption, etc. It is hypothesized that surfactants with twin head groups will exhibit lower losses in the subsurface as compared to single head group surfactants while maintaining high solubilization. The contaminant addressed in this research was naphthalene and the surfactants evaluated were mono- and di-sulfonated anionics (sodium dodecylbenzenesulfonate...
Topics: DTIC Archive, OKLAHOMA UNIV NORMAN, *SOIL REMEDIATION, *SUBSURFACE, *SURFACE ACTIVE SUBSTANCES,...
In order to understand the effects of certain properties of protective coating materials on corrosion protection, a study was made of these properties without the effects of corrosion present. The moisture absorption properties of various hot-melt coatings have been so investigated for periods up to 14-2/3 years. It was found that low penetration coal-tar enamel established the lowest absorption rate of the 11 materials tested. It was also found that after 5 years each material reached a...
Topics: DTIC Archive, BUREAU OF RECLAMATION DENVER CO OFFICE OF CHIEF ENGINEER, *SORPTION, *BITUMINOUS...
A wide variety of ionic contaminates can be removed from aqueous solutions by electrosorption on carbon aerogel electrodes. Carbon aerogel is an ideal electrode material because of its low electrical resistivity, high specific area, and controllable pore size distribution. This approach may avoid the generation of a substantial amount of secondary waste associated with ion exchange processing. Ion exchange resins require concentrated solutions of acid, base, or salt for regeneration, whereas...
Topics: DTIC Archive, Farmer, Joseph C., LAWRENCE LIVERMORE NATIONAL LAB CA, *WATER TREATMENT, GROUND...
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *CHEMISTRY, USSR, IONS, SYNTHESIS,...
Containment of chemical wastes in near-surface and repository environments is accomplished by designing engineered barriers to fluid flow. Impermeable barriers are intended to contain wastes for subsequent cleanup treatment or for longer-term isolation in cases where no effective cleanup treatment yet exists. Impermeable barriers also have recently been applied as components of funnel and gate approaches to selectively channel contaminated fluid flow through a reactive treatment zone....
Topics: DTIC Archive, Nagy, Kathryn L, COLORADO UNIV AT BOULDER DEPT OF GEOLOGICAL SCIENCES, *CLAY,...
The applicability of several existing adsorption theories for predicting the equilibrium isotherms for the sorption of hydrogen (H2) by carbon dioxide (CO2) cryodeposits has been examined in the pressure range from 10 to the - 8th power to 10 to the -3rd power torr. It is demonstrated that the H2 sorption capacity of CO2 frost cryosorbents at temperatures between 12 and 20K may be accurately predicted by an equilibrium isotherm equation proposed by Dubinin and Radushkevich. This equation is...
Topics: DTIC Archive, Tempelmeyer, K E, ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN, *CRYOPUMPING,...
