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Showing 1 to 20 of 103 for “"Freundlich"”.
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On Competitive Adsorption of Oxyanions by Soils (Freundlich Equation, Enthalphy of Adsorption, Selectivity Coefficient, Anion Mixtures, Anion)
The adsorption behavior of anionic mixtures (binary-solute combinations of arsenate, molybdate, and phosphate) by three soil samples (Cecil clay, EPA-14, and Catlin silt loam) was investigated using batch equilibrium techniques. The adsorption of arsenate and molybdate by all three soils was …
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ADSORPTION OF ANTIBIOTICS BY VERMICULITE
… adsorption techniques. The Langmuir and Freundlich isotherm models were initially used to explain the adsorption processes. The separation factor (RL) values derived from the Langmuir model and the 1/n values derived from Freundlich model in the present investigation were less than one, …
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Kinetics, mass transfer, and mass re-equilibrium for arsenate adsorption on iron oxide-based carbons
… time in small water treatment systems. … The Freundlich isotherm can fit experimental data well: a crossover point for the two fitted Freundlich isotherms was observed and nano-FeAC had higher adsorption plateau. Furthermore, we demonstrated that due to the MRE process, a pseudo-equilibrium of …
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Veränderungen interpersonal-affektiver Schemata im Verlauf psychoanalytischer Langzeitbehandlungen
… sie ihr Beziehungsverhalten zunehmend als freundlich den Objekten zugewandt und berichteten von mehr positiven objektbezogenen Affekten.
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Lumped approach for sorption of organic contaminant mixtures to simulated aquifer sorbents
… The results of the BESTs were analyzed using the Freundlich sorption equation, and the lumped approach was evaluated on the basis of experimentally derived lumping criteria (i.e., Freundlich sorption parameters). Also, the use of the ideal adsorbed solution theory (IAST) with the determined …
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Efficiency of natural coagulants for treatment of public market wastewater
… system were analysis using Langmuir and Freundlich models. The adsorption isotherms studies were fitted well by Langmuir model than Freundlich model. The RL value was 47.39 mg/L, 9.20 mg/L, 54.64 mg/L, 1.51 Pt.Co and 2.91 NTU for COD, TSS, O&G, colour and turbidity respectively, which …
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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
… sorption isotherms were generated using the Freundlich model. Comparison of Freundlich coefficients for the two types suggest that the Mines Park biomat has a higher sorption capacity which may be due to higher organic content. Comparison with similar sorbents like activated sludge suggests …
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The adsorption of vinyl chloride and vinylidene chloride monomers on their polymers
… branches of the isotherms appeared to obey the Freundlich isotherm and the approximate isosteric heats of adsorption calculated from the equilibrium data fell off linearly as the logarithm of the amount of monomer adsorbed increased; as would be expected if the Freundlich isotherm were obeyed. …
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Disposal of Bituminized and Other Low- and Medium-Level Wastes: Waste Characterization and the Retention of Migrating Radionuclides by Steel Corrosion Products
… one system with slow flow. Langmuir and Freundlich adsorption isotherms were used to analyze the data and to characterize the ion exchange capacity of the sorbate.
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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
… 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 asphalt and coal tar. No statistically significant correlation was observed between CM …
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Adsorption of sulfate and phosphate at the mineral-water interface: isotherm, stoichiometry, and models
… well by the simple Langmuir, two-site Langmuir, Freundlich, and Temkin equations. The capacity of SO42-adsorption for y-AI203 was five times greater than for kaolinite, indicating the difference in reactive site density between y-Ab03 and kaolinite. Mathematical analyses for the adsorption …
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Removal of antibiotics from contaminated waters using natural zeolite
… capacity was calculated using the Langmuir-Freundlich sorption model. The results showed that at a neutral pH the maximum sorption capacity for the antibiotics was up to 8 mg/g. The sorption capacity increased as the solution pH decreased. The presence of NOM reduced the sorption of OTC but …
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Supercritical fluid extraction of rice bran with adsorption on rice hull ash
… also showed similar adsorption behavior. Freundlich isotherms successfully described adsorption behavior of the antioxidant compounds in the batch study using rice bran oil-hexane miscella. Freundlich fitting parameters (k and 1/n) were used to plot Van’t Hoff- Arrhenius equations and …
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Characterization and modeling of soluble manganese removal from drinking water by oxide-coated filter media
… the surface species found by XPS analysis. The Freundlich isotherm described Mn²⁺ sorption on this and the naturally coated media; sorption capacity increased between pH 6.0 and 7.5, and was reduced by [Ca²⁺] = 60 mg L⁻¹. The global Mn²⁺ oxidation rates for all coated media at pH 7.5 were 0.008 …
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Decentralized State Estimation using Robotic Sensor Networks
<p>This dissertation proposes three control algorithms for active sensing with one or several autonomous robots.</p><p>The algorithms all rely on models of the information content of the sensor measurement with respect to the relative poses between sensors and subjects.</p><p>The approaches each …
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Quantification of Parameters in Models for Contaminant Dissolution and Desorption in Groundwater
… which represented sorption/desorption using a Freundlich isotherm. The results suggest that first-order/Freundlich models can reproduce dynamic desorption attributed to high-and-low relative energy sorption sites. However, additional experimentation with the inversion method suggests that mass …
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Sorption and desorption of selenium in cement formulations
… added to vary the concentrations as needed. Freundlich isotherms fitted to the data indicate irreversible sorption by selenium.
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Role of Nanosize Effects on the Adsorptive and Catalytic Properties of NiO Nanoparticles towards Heavy Hydrocarbons
… as an asphaltene model molecule. Langmuir and Freundlich adsorption isotherms models and computational modeling for the interaction between NiO nanoparticle surface and Q-65 were carried out to understand the adsorption behavior. TGA/DTA and TGA-MS techniques were used to study the effect of …
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Land Use Impacts of Plastic Mulch Tomato Production and Evaluation of Sorbent Control on Shellfish Hatchery Operations
… were shown to increase sorption. Utilizing the Freundlich isotherm, the capacity of the eight sorbents studies ranged from 25 to 221 ug/g with a 24-hour contact time. Column studies with an influent concentration of 300 ug/L dissolved copper showed that using 10 grams of a GAC sorbent, a flow …
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Adsorbents as mitigators in the Transport System of Nitrogen in Soil
… adsorption behaviors in this thesis by employing Freundlich and Langmuir equations, pseudo-first and second-order kinetic equations, and thermodynamic analysis, both of which are focused on various studies performed in previous research work. Excess ammonium NH4+treatment and neutralization of …
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