Title: Ukrainian Journal of Physical Optics

Title: Ukrainian Journal of Physical Optics

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? Vlokh, R.O. (2010), Bibliometric and statistical analyses of Ukrainian scientific journals. Physics journals. Ukrainian Journal of Physical Optics, 11, S11-S25.

Full Text: 2010\Ukr J Phy Opt11, S11.pdf

Abstract: The present work is devoted to evaluation of the Ukrainian physics journals on the basis of Pareto distribution and a comparison of the present situation with that occurring five years ago. It is shown that about 20 journals may be qualified as principal ones, though the total number of the corresponding editions is equal to 63. The criteria for evaluation of Ukrainian scientific journals are formulated.

Keywords: Bibliometric, Bibliometry, Comparison, Evaluation, Impact Factor, Journals, Science, Science Citation Analysis, Scientific Journals, Ukrainian Physics Journals

Title: Ukrainskii Khimicheskii Zhurnal

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? Loshkare, Y.M., Malaya, R.V. and Snetkova, L.P. (1971), Kinetics of cadmium electrodeposition and adsorption phenomena. Ukrainskii Khimicheskii Zhurnal, 37 (12), 1231-??.

? Oshkare, Y.M., Snetkova, L.P. and Malaya, R.V. (1972), Kinetics of cadmium electrodeposition and adsorption phenomena. Ukrainskii Khimicheskii Zhurnal, 38 (1), 38-??.

? Nazarok, V.I., Shmelev, A.S., Evseeva, D.I. and Galich, P.N. (1974), Diffusion kinetics of adsorption in systems with Langmuir isotherm. Ukrainskii Khimicheskii Zhurnal, 40 (6), 613-617.

? Kakaulina, T.N., Levchenko, T.M. and Koganovskii, A.M. (1976), Kinetics of organic matters adsorption from aqueous-solutions by active anthracites of different porous structure. Ukrainskii Khimicheskii Zhurnal, 42 (8), 873-874.

? Antonov, S.P., Gorodyskij, A.V. and Morozenko, E.S. (1976), Kinetics of contact exchange of metals with adsorption of organic matters. Ukrainskii Khimicheskii Zhurnal, 42 (11), 1123-1126.

? Zolotarev, P.P. and Marutovskij, R.M. (1977), Kinetics equations of 2 substances mixture adsorption for adsorbents with biporous structure. Ukrainskii Khimicheskii Zhurnal, 43 (6), 612-613.

? Koganovskij, A.M., Timoshenko, M.N., Grishchenko, A.E., Marutovskij, R.M. and Roda, I.G. (1977), Kinetics of adsorption from solutions by fine-grained active carbons. Ukrainskii Khimicheskii Zhurnal, 43 (7), 693-698.

? Goroshchenko, J.G., Soliev, L., Savchenko, L.T. and Mardanenko, V.K. (1977), Structure of phase complex of solution isotherm 100-degrees of Na⁺, K⁺, Mg²⁺ parallel to SO₄^2-, Cl--H₂O system. Ukrainskii Khimicheskii Zhurnal, 43 (12), 1277-1280.

? Gasanova, K.G. and Abduragimova, R.A. (1978), Isotherm of solubility of KVO₃-K₂SO₄-K₃PO₄-H₂O system at 35 and 60-degrees. Ukrainskii Khimicheskii Zhurnal, 44 (2), 158-163.

? Larina, A.A. and Alejnikov, V.G. (1978), Effect of reaction participants adsorption by oxidized coals on kinetic characteristic of sucrose inversion process. Ukrainskii Khimicheskii Zhurnal, 44 (5), 498-502.

? Litsov, N.I., Nikolaevskaja, V.I. and Kachan, A.A. (1978), Effect of medium reaction on kinetics and mechanism of methylene-blue adsorption on silicon dioxides. Ukrainskii Khimicheskii Zhurnal, 44 (12), 1275-1277.

? Rudenko, V.M. and Tarasevich, Y.I. (1979), Kinetics of aceton and dioxane adsorption by montmorillonite. Ukrainskii Khimicheskii Zhurnal, 45 (6), 528-530.

? Roda, I.G., Timoshenko, M.N. and Marutovsky, R.M. (1979), Adsorption of soluble substances by activated charcoal in the apparatus with intermixing (external diffusion mass exchange). Ukrainskii Khimicheskii Zhurnal, 45 (7), 603-609.

Keywords: Adsorption, Diffusion

Title: Ultrapure Water

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? Bigwood, M. (2004), Trends in high-purity water research: A bibliometric patent review. Ultrapure Water, 21 (1), 24-29.

Full Text: 2004\Ult Wat21, 24.pdf

Title: Ultrasonics Sonochemistry

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? Breitbach, M. and Bathen, D. (2001), Influence of ultrasound on adsorption processes. Ultrasonics Sonochemistry, 8 (3), 277-283.

Full Text: 2001\Ult Son8, 277.pdf

Abstract: One of the most popular means for removal of organic water pollutants found in small concentrations is by adsorption. An important step in adsorption processes is the regeneration of the adsorbent as it does not only affect the adsorption–desorption cycle but also the expenses of the following process steps. State of the art regeneration of adsorbent resins is done by chemical methods. These require the use of organic solvents or inorganic chemicals and involve a difficult secondary separation step. Therefore, industry seeks for alternative methods to regenerate exhausted adsorbents. One of the discussed regeneration methods is desorption by ultrasound.

Ultrasound does not only promote desorption but also enhances the mass transfer of sorption processes. We discuss the arising problems and basic effects when applying ultrasound during sorption processes in order to show the potentials of this desorption process. The focus is laid in particular on the influence of ultrasound frequency and intensity.

Keywords: Adsorption, Desorption, Ultrasound, Mass Transfer, Intensity, Frequency

? Hamdaoui, O., Naffrechoux, E., Tifouti, L. and Pétrier, C. (2003), Effects of ultrasound on adsorption–desorption of p-chlorophenol on granular activated carbon. Ultrasonics Sonochemistry, 10 (2), 109-114.

Full Text: 2003\Ult Son10, 109.pdf

Abstract: The aim of this work is the evaluation of the effects of ultrasound on p-chlorophenol adsorption–desorption on granular activated carbon. Adsorption equilibrium experiments and batch kinetics studies were carried out in the presence and the absence of ultrasound at 21 kHz. Results indicate that the adsorption of p-chlorophenol determined in the presence of ultrasound is lower than the adsorption observed in the absence of ultrasound. Desorption of p-chlorophenol from activated carbon with and without the application of ultrasound was studied. The desorption rates were favoured by increased ultrasound intensity. This rise is more noticeable as temperature increases. The addition of ethanol or NaOH to the system causes an enhancement of the amount of p-chlorophenol desorbed, especially in the presence of ultrasound. A synergetic enhancement of the desorption rate was observed when ultrasonic irradiation was coupled with ethanol chemical regeneration.

Keywords: Ultrasound, Adsorption, Desorption, Activated Carbon, P-Chlorophenol

? Entezari, M.H. and Pétrier, C. (2005), A combination of ultrasound and oxidative enzyme: sono-enzyme degradation of phenols in a mixture. Ultrasonics Sonochemistry, 12 (4), 283-288.

Full Text: 2005\Ult Son12, 283.pdf

Abstract: Sono-degradation and sono-enzyme degradation of phenols were performed on the mixtures of double compounds (phenol, p-chlorophenol; phenol, p-cresol; phenol, p-nitrophenol; and p-chlorophenol, p-cresol) in aqueous medium. Sono-degradation of phenol and its substituted compounds individually behaved approximately the same, but in the case of mixture behaved differently. Sonodegradation of substituted phenols was easier than phenol in a mixture, but there was an exception in the combination of phenol and p-nitrophenol that the degradation of phenol was faster than substituted compound. This behavior was the same in sono-enzyme degradation, but with higher degradation rate. Between these mixtures, the combination of phenol and p-cresol presented a significant different behavior in case of single and double compounds solutions. In this system, the sono-degradation of phenol in mixture was more difficult than phenol alone but, the sono-degradation of p-cresol in mixture was easier in comparison with p-cresol alone. In sono-enzyme degradation, p-cresol as a more reactive compound facilitated the remove of phenol in mixture in compare of the individual case. (C) 2004 Elsevier B.V. All rights reserved.

Keywords: Sono-Degradation, Sono-Enzyme Degradation, Horseradish Peroxidase, Phenol, P-Cresol, P-Chlorophenol, P-Nitrophenol, Sonochemical Reactions, Horseradish-Peroxidase, Waste-Water, Frequency, Removal

? Bernardo, E.C., Fukuta, T., Fujita, T., Ona, E.P., Kojima, Y. and Matsuda, H. (2006), Enhancement of saccharin removal from aqueous solution by activated carbon adsorption with ultrasonic treatment. Ultrasonics Sonochemistry, 13 (1), 13-18.

Full Text: 2006\Ult Son13, 13.pdf

Abstract: This study investigates the use of ultrasonication as a pretreatment process and its effect on the adsorption characteristics of saccharin onto activated carbon (AC). Ultrasonic decomposition of saccharin was performed at a frequency of 500 kHz under argon and O₂/N₂ (20/80 vol%) atmospheres. Adsorption was carried out using a commercial activated carbon. The behavior of total organic carbon (TOC) during ultrasonication was investigated. Saccharin removal after 180 min of ultrasonication under Ar and O₂/N₂ atmospheres are 38% and 26%, respectively, while the amount of saccharin removed by activated carbon adsorption without US pretreatment is 40% after 16 h. After 16 h of AC adsorption with 180 min of ultrasonic pretreatment under Ar and O₂/N₂ atmospheres, both removal ratios increased to 75%. These results indicated that the pretreatment of sonication under O₂/N₂ leads to the increase in the amount of saccharin adsorbed on AC. On the other hand, the TOC removal by decomposition by ultrasound is not more than 5% in both Ar and O₂/N₂ atmospheres after 180 min ultrasonication. However, the TOC removal increased to 54% and 69% after 16 h of adsorption of saccharin pretreated by ultrasonication for 180 min under Ar and O₂/N₂ atmospheres, respectively. About 13% and 16% TOC removal in Ar and in O₂/N₂, respectively, were achieved due to adsorption of the by-products. It is considered that the improvement in TOC removal is also brought about by the formation of the by-products that were adsorbed onto AC.

Keywords: Ultrasonication, Adsorption, Saccharin, Total organic carbon, Adsorption capacity

? Entezari, M.H., Mostafai, M. and Sarafraz-Yazdi, A. (2006), A combination of ultrasound and a bio-catalyst: removal of 2-chlorophenol from aqueous solution. Ultrasonics Sonochemistry, 13 (1), 37-41.

Full Text: 2006\Ult Son13, 37.pdf

Abstract: Phenolic compounds have become a cause for worldwide concern due to their persistence, toxicity and health risks. This paper reports a three-step approach to remove 2-chlorophenol from dilute aqueous solution and compares each technique. The first step utilizes Horse Radish Peroxidase (HRP) in presence of hydrogen peroxide to oxidize this organic pollutant (enzyme treatment). For a more efficient removal of 2-chlorophenol, it is necessary to add the enzyme solution gradually to the contents of the reactor instead of rapid addition. The second step, involving ultrasonic waves eliminated 2-chlorophenol through hydroxyl radical generated by the cavitation process (sono-degradation). In the third step, a combination of ultrasonic waves and enzyme was used (sono-enzyme degradation). It should be mentioned that, the enzyme can be active in the presence of ultrasonic waves under the proper sonication. The degradation has been studied at different temperatures, intensities of irradiation, and concentrations of enzyme. The rate of degradation exhibited pseudo-first order behavior and the combination method was more effective than sonolysis and enzyme treatment individually. (c) 2004 Elsevier B.V. All rights reserved.

Keywords: 2-Chlorophenol, Cavitation, Horseradish Peroxides, Sonolysis, Degradation, Sonochemical Degradation, Phenol, Trichloroethylene, Chlorobenzene, Decomposition, Kinetics, Water

? Juang, R.S., Lin, S.H. and Cheng, C.H. (2006), Liquid-phase adsorption and desorption of phenol onto activated carbons with ultrasound. Ultrasonics Sonochemistry, 13 (3), 251-260.

Full Text: 2006\Ult Son13, 251.pdf

Abstract: The effect of 48-kHz ultrasound on the adsorption and desorption of phenol from aqueous solutions onto coconut shell-based granular activated carbons was studied at 25 °C. Experiments were performed at different carbon particle sizes (1.15, 2.5, 4.0 mm), initial phenol concentrations (1.06–10.6 mol/m³), and ultrasonic powers (46–133 W). Regardless of the absence and presence of ultrasound, the adsorption isotherms were well obeyed by the Langmuir equation. When ultrasound was applied in the whole dsorption process, the adsorption capacity decreased but the Langmuir constant increased with increasing ultrasonic power. According to the analysis of kinetic data by the Elovich equation, it was shown that the initial rate of adsorption was enhanced after sonication and the number of sites available for adsorption was reduced. The effect of ultrasonic intensity on the initial rate and final amount of desorption of phenol from the loaded carbons using 0.1 mol/dm³ of NaOH were also evaluated and compared.

Keywords: Ultrasound, Adsorption, Desorption, Activated carbons, Phenol

? Entezari, M.H. and Al-Hoseini, Z.S. (2007), Sono-sorption as a new method for the removal of methylene blue from aqueous solution. Ultrasonics Sonochemistry, 14 (5), 599-604.

Full Text: 2007\Ult Son14, 599.pdf

Abstract: The sorption of methylene blue as a basic dye onto cellulosic materials such as waste newspaper was examined kinetically in the presence of ultrasound (sono-sorption) and in its absence (conventional method). The effects of various experimental parameters such as the amount of sorbent, type of cellulosic sorbents, initial dye concentration, temperature, and contact time have been investigated using a batch sorption technique. The information obtained can be used for treating effluents from the dye industry which deals with this kind of dye. The results show that as the amount of sorbent is increased, the dye removal in conventional method increases accordingly. In case of sono-sorption, it was stopped at specific amount of sorbent. More than 98% removal of the dye could be achieved in a very short period of time of sonication with respect to the conventional method. This behavior is related to the cavitation process which facilitates the removal of dye from aqueous solution. The method mentioned could be employed as a low cost alternative to the commercial activated carbon currently used in wastewater treatment for the removal of dyes.

Keywords: Sono-Sorption, Methylene Blue, Cellulosic Materials, Cavitation

? Entezari, M.H., Al-Hoseini, Z.S. and Ashraf, N. (2008), Fast and efficient removal of Reactive Black 5 from aqueous solution by a combined method of ultrasound and sorption process. Ultrasonics Sonochemistry, 15 (4), 433-437.

Full Text: 2008\Ult Son15, 433.pdf

Abstract: Removal of Reactive Black 5 (RB5) from aqueous solutions was carried by the sorption process in the presence and in the absence of ultrasound. Sorption of the dye on the solid phase was investigated in a series of batch sorption experiments to determine the influence of different parameters such as contact time, amount of sorbent and concentration of pollutant on the removal efficiency of RB5 with and without ultrasound. The experimental data were fitted properly to the Freundlich model and the isotherm constants were 28.2 and 7.4 for k(f) and 0.13 and 0.38 for lln in the presence and in the absence of ultrasound (20 kHz) respectively. The data were analyzed with different sorption kinetic models and were better fitted with a pseudo-second-order kinetic model. Two ultrasonic generators at 20 and 500 kHz were used for sonication of the system. This investigation also reveals that RB5 can be removed by higher frequency apparatus (500 kHz) without sorbent in about 60 min sonication. The rate of removal was higher at the higher frequency than at the lower one. (c) 2007 Elsevier B.V. All rights reserved.

Keywords: Activated Carbon, Adsorption, Aqueous Solution, Aqueous Solutions, Azo-Dye, Black 5, Decolorization, Dye, Efficiency, Experimental, Experiments, Frequency, Freundlich, Freundlich Model, Investigation, Isotherm, Kinetic, Kinetic Models, Methylene-Blue, Mineralization, Model, Models, Reactive Black 5, Removal, Removal Efficiency, Rights, Solution, Sonication, Sonochemical Degradation, Sorption, Sorption Process, Ultrasonic, Ultrasound

? Li, M., Li, J.T. and Sun, H.W. (2008), Decolorizing of azo dye Reactive red 24 aqueous solution using exfoliated graphite and H₂O₂ under ultrasound irradiation. Ultrasonics Sonochemistry, 15 (5), 717-723.

Full Text: 2008\Ult Son15, 717.pdf

Abstract: At its natural pH (6.95), the decolorization of Reactive red 24 in ultrasound, ultrasound/H₂O₂, exfoliated graphite, ultrasound/exfoliated graphite, exfoliated graphite/H₂O₂ and ultrasound/exfoliated graphite/H₂O₂ systems were compared. An enhancement was observed for the decolorization in ultrasound/exfoliated graphite/H₂O₂ system. The effect of solution pH, H₂O₂ and exfoliated graphite dosages, and temperature on the decolorization of Reactive red 24 was investigated. The sonochemical treatment in combination with exfoliated graphite/H₂O₂ showed a synergistic effect for the decolorization of Reactive red 24. The results indicated that under proper conditions, there was a possibility to remove Reactive red 24 very efficient from aqueous solution. The decolorization of other azo dyes (Reactive red 2, Methyl orange, Acid red 1, Acid red 73, Acid red 249, Acid orange 7, Acid blue 113, Acid brown 75, Acid green 20, Acid yellow 42, Acid mordant brown 33, Acid mordant yellow 10 and Direct green 1) was also investigated, at their natural pH. (C) 2007 Elsevier B.V. All rights reserved.

Keywords: Acid, Aqueous, Azo Dye, Decolorization, Degradation, Dye, Dyes, Elsevier, Exfoliated Graphite, H₂O₂, Oxidation, pH, Sorption, System, Temperature, Treatment, Ultrasound, Wastewater

? Milenković, D.D., Dašić, P.V. and Veljković, V.B. (2009), Ultrasound-assisted adsorption of copper(II) ions on hazelnut shell activated carbon. Ultrasonics Sonochemistry, 16 (4), 557-563.

Full Text: 2009\Ult Son16, 557.pdf

Abstract: The present study was aimed to removal of Cu(II) ions from aqueous solution by ultrasound-assisted adsorption onto the granular activated carbon obtained from hazelnut shells. The attention was focused on modeling the equilibrium and kinetics of Cu(II) adsorption onto the granular activated carbon. The granular activated carbon was prepared from ground dried hazelnut shells by simultaneous carbonization and activation by water steam at 950°C for 2 h. Adsorption isotherm data were better fitted by the Langmuir model than the Freundlich model in both the absence and the presence of ultrasound. The maximum adsorption capacity of the adsorbent for Cu(II), calculated from the Langmuir isotherms, in the presence of ultrasound (3.77 mmol/g) is greater than that in the absence of ultrasound (3.14 mmol/g). The adsorption process in the absence and the presence of ultrasound obeyed to the pseudo second-order kinetics. The removal of Cu(II) ions was higher in the presence of ultrasound than in its absence, but ultrasound reduced the rate constant. The intraparticular diffusion model indicated that adsorption of Cu(II) ions on the granular activated carbon was diffusion controlled as well as that ultrasound promoted intraparticular diffusion. (c) 2008 Elsevier B.V. All rights reserved.

Keywords: Activated Carbon, Adsorption, Almond, Aqueous-Solutions, Cadmium, Cr(VI), Cu(II), Equilibrium, Equilibrium, Hazelnut Shell, Kinetics, Langmuir Isotherms, Modeling, Phenol, Removal, Sorption Process, Ultrasound, Ultrasound-Assisted Adsorption, Wood Sawdust

? Küncek, İ. and Şener, S. (2010), Adsorption of methylene blue onto sonicated sepiolite from aqueous solutions. Ultrasonics Sonochemistry, 17 (1), 250-257.

Full Text: 2010\Ult Son17, 250.pdf

Abstract: The aim of the present study is to enhance the methylene blue (MB) adsorption of sepiolite by ultrasonic treatment. The natural sepiolite was pretreated by sonication to improve the surface characteristics and enhance the dye uptake capacity. Sonication process resulted in a significant increase in the specific surface area (SSA) of sepiolite. The FTIR spectrum of the sonicated sepiolite indicates that the tetrahedral sheet is probably distorted after sonication process. The effect of various parameters such as sonication, pH, initial dye concentration and temperature on dye adsorption has been investigated. The adsorbed amount of MB on sepiolite increased after sonication as well as with increasing pH and temperature. The experimental data were evaluated by applying the pseudo-first- and second-order, and the intraparticle diffusion adsorption kinetic models. Adsorption process of MB onto sepiolite followed the pseudo-second-order rate expression. The experimental data were analyzed by Langmuir and Freundlich isotherms, and found that the isotherm data were reasonably well correlated by Langmuir isotherm. Maximum monolayer adsorption capacity of sepiolite for MB increased from 79.37 to 128.21 mg/g after the sonication. Various thermodynamic parameters, such as ΔG(0), ΔH-0 and ΔS-0 were calculated. The thermodynamics of MB/sepiolite system indicated spontaneous and endothermic nature of the process. Adsorption measurements showed that the process was very fast and physical in nature. (C) 2009 Elsevier B.V. All rights reserved.

Keywords: Acid, Activated Sepiolite, Adsorption, Adsorption Capacity, Adsorption Kinetic, Aqueous Solutions, Basic Dye, Capacity, Cationic Dyes, Characteristics, Concentration, Data, Diffusion, Dye, Dye Adsorption, Dye Removal, Endothermic, Experimental, Expression, Freundlich, FTIR, Intraparticle Diffusion, Isotherm, Isotherms, Kaolinite, Kinetic, Kinetic Models, Kinetics, Langmuir, Langmuir And Freundlich Isotherms, Langmuir Isotherm, MB, Methylene Blue, Model-Calculations, Models, Monolayer, Natural, Particle-Size, pH, Physical, Pseudo Second Order, Pseudo-Second-Order, Pseudo-Second-Order Rate, Pyrophyllite, Removal, Rights, Second Order, Second-Order, Sepiolite, Solutions, Sonication, Specific Surface, Specific Surface Area, Surface, Surface Area, Temperature, Thermodynamic, Thermodynamic Parameters, Thermodynamics, Treatment, Ultrasonic, Ultrasonic Treatment, Uptake

? Karimi, M., Entezari, M.H. and Chamsaz, M. (2010), Sorption studies of nitrate ion by a modified beet residue in the presence and absence of ultrasound. Ultrasonics Sonochemistry, 17 (4), 711-717.

Full Text: 2010\Ult Son17, 711.pdf

Abstract: Kinetic and thermodynamic studies were carried out for the adsorption of nitrate ion from aqueous solutions onto modified beet residue and for desorption from the sorbent to the solution in batch experiments The beet residue was modified by epichlorohydrin in the presence of pyridine The experiments were conducted in the presence and absence of ultrasound The removal of this ion was examined by varying experimental conditions such as the amount of sorbent, contact time, concentration, and temperature It was found that more than 90% of nitrate ion was removed in less than 2 min from the solution Results indicate that the adsorption of nitrate in the presence of ultrasound was higher at lower temperature (10ºC) and it was lower at higher temperatures with respect to the control method (without ultrasound) In the case of desorption study, the amount of desorption was higher in the presence of ultrasound than its absence at different applied temperatures The Langmuir isotherm model fits adequately the experimental data for adsorption and desorption studies In point of kinetics. the secondorder kinetic model describes the sorption process for this ion The thermodynamic parameters such as ΔGº, ΔHº, and ΔSº were determined for the sorption of NO3- from the temperature dependence of the sorption process. (C) 2009 Elsevier B.V. All rights reserved.

Keywords: 2nd-Order Kinetic-Model, Adsorption, Adsorption, Aqueous Solutions, Batch, Batch Experiments, Concentration, Control, Data, Desorption, Desorption, Desorption Studies, Experimental, Experiments, Granular Activated Carbon, Groundwater, Isotherm, Isotherm Model, Kinetic, Kinetic Model, Kinetics, Langmuir, Langmuir Isotherm, Langmuir Isotherm Model, Model, Modified, Modified Beet Residue, Nitrate, P-Chlorophenol, Polymeric Resin, Pyridine, Reduction, Removal, Rights, Solution, Solutions, Sorbent, Sorption, Sorption Process, Temperature, Thermodynamic, Thermodynamic Parameters, Thermodynamic Studies, Time, Ultrasound, Water

? Şener, S. and Özyılmaz, A. (2010), Adsorption of naphthalene onto sonicated talc from aqueous solutions. Ultrasonics Sonochemistry, 17 (5), 932-938.

Full Text: 2010\Ult Son17, 932.pdf

Abstract: The adsorption behavior of naphthalene onto naturally hydrophobic talc from aqueous solution was investigated in this study. The natural talc was first pretreated by sonication to improve the surface characteristics and enhance the uptake capacity by increasing the specific surface area (SSA) of talc. The naphthalene uptake of talc was found as 276 mg g^-1, and increased to 359 mg g^-1 after the sonication. Adsorption studies also showed that the adsorption of naphthalene onto the sonicated talc was not affected by changes in pH suggesting that the main driving forces for naphthalene adsorption onto talc was hydrophobic bonding rather than electrostatic force. The pseudo-first and pseudo-second orders and intraparticle diffusion equation were used to evaluate the kinetic data and the constants were determined. Adsorption process of naphthalene onto talc followed the pseudo-second-order rate expression for different initial naphthalene concentrations. The Langmuir and Freundlich isotherm models were used to model the isotherm data for their applicability. The Freundlich isotherm best fitted for the adsorption of naphthalene onto talc. (C) 2010 Published by Elsevier B.V.

Keywords: Adsorbents, Adsorption, Adsorption Behavior, Aqueous Solution, Aqueous Solutions, Behavior, Capacity, Changes, Characteristics, Data, Diffusion, Driving, Expression, First, Force, Freundlich, Freundlich Isotherm, Hocs, Hydrophobicity, Intraparticle Diffusion, Isotherm, Kinetic, Kinetic Data, Kinetics, Langmuir, Model, Models, Molecular-Weight, Naphthalene, Natural, Organic-Compounds, Particle-Size, pH, Polycyclic Aromatic-Hydrocarbons, Pseudo Second Order, Pseudo-First and, Pseudo-Second-Order, Pseudo-Second-Order Rate, Pyrophyllite, Removal, Solution, Solutions, Sonication, Sorption, Specific Surface, Specific Surface Area, Surface, Surface Area, Talc, Ultrasonic Treatment, Uptake