Personal Research Database

Full Text: 2010\J Haz Mat178, 233.pdf

Abstract: A series of highly vis-light active Ni,La-codoped SrTiO3 photocatalysts were successfully synthesized with sol-gel process. The characterization results show that the calcination temperature has a strong influence on the physical-chemical properties of as-synthesized photocatalysts. The surface area and porosity, even the initial adsorption rate for malachite green (MG), decreased with increasing calcination temperature. To evaluate the photocatalytic activities, the photodegradation of a water contaminant (MG) was carried out under visible light irradiation. The as-synthesized photocatalysts exhibited a high vis-light activity, and a 100% degradation of MG was observed for the Ni,La-SrTiO3-x catalysts calcined at low temperature under visible light irradiation for 1 h, during which only 7% and 15% of MG was degraded for self-degrade and commercially available photocatalyst Degussa P25, respectively. The high vis-light activity is a result of the best combination of many properties, such as the intensive visible light response, the large surface area and pore volume and the high initial adsorption rate for substrate. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Aqueous-Solutions, Band-Structure, Chromium, Codoped, Decomposition, Degradation, H-2, Methylene-Blue, Photocatalysis, Pore, S-Doped TiO₂, Sol-Gel, Strontium Titanate, Surface, Visible Light Activity, Visible-Light Irradiation, Water

? Mata, Y.N., Blazquez, M.L., Ballester, A., Gonzalez, F. and Munoz, J.A. (2010), Studies on sorption, desorption, regeneration and reuse of sugar-beet pectin gels for heavy metal removal. Journal of Hazardous Materials, 178 (1-3), 243-248.

Full Text: 2010\J Haz Mat178, 243.pdf

Abstract: This work reports the effectiveness of sugar-beet pectin xerogels for the removal of heavy metals (cadmium, lead and copper) after multiple batch sorption-desorption cycles, with and without a gels regeneration step. Metals were recovered from xerogel beads without destroying their sorption capability and the beads were successfully reused (nine cycles) without significant loss in both biosorption capacity and biosorbent mass. Metals uptake levelled off or increased after using a 1 M CaCl2 regeneration step after each desorption. Calcium, as a regenerating agent, increased the stability and reusability of the gels repairing the damage caused by the acid and removing the excess protons after each elution providing new binding sites. Because of their excellent reusability, pectin xerogels are suitable for metal remediation technologies. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Aqueous-Solutions, Batch, Beads, Beta Vulgaris, Binding, Biosorption, Biosorption-Desorption Cycles, Cadmium, Copper, Cu(II), Desorption, Equilibrium, Heavy Metal, Heavy Metals, Ions, Lead, Metal Removal, Metals, Pb(II), Pectin Xerogel, Regeneration, Remediation, Removal, Reuse, Seaweed Biomass, Sorption

? Dahlan, I., Ahmad, Z., Fadly, M., Lee, K.T., Kamaruddin, A.H. and Mohamed, A.R. (2010), Parameters optimization of rice husk ash (RHA)/CaO/CeO₂ sorbent for predicting SO₂/NO sorption capacity using response surface and neural network models. Journal of Hazardous Materials, 178 (1-3), 249-257.

Full Text: 2010\J Haz Mat178, 249.pdf

Abstract: In this work, the application of response surface and neural network models in predicting and optimizing the preparation variables of RHA/CaO/CeO2 sorbent towards SO2/NO sorption capacity was investigated. The sorbents were prepared according to central composite design (CCD) with four independent variables (i.e. hydration period, RHA/CaO ratio, CeO2 loading and the use of RHA(raw) or pretreated RHA(600 degrees C) as the starting material). Among all the variables studied, the amount of CeO2 loading had the largest effect. The response surface models developed from CCD was effective in providing a highly accurate prediction for SO2 and NO sorption capacities within the range of the sorbent preparation variables studied. The prediction of CCD experiment was verified by neural network models which gave almost similar results to those determined by response surface models. The response surface models together with neural network models were then successfully used to locate and validate the optimum hydration process variables for maximizing the SO2/NO sorption capacities. Through this optimization process, it was found that maximum SO2 and NO sorption capacities of 44.34 and 3.51 mg/g, respectively could be obtained by using RHA/CaO/CeO2 sorbents prepared from RHA(raw) with hydration period of 12 h, RHA/CaO ratio of 2.33 and CeO2 loading of 8.95%. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Absorbent, Air Pollution, Algorithm, CeO₂, Flue-Gas Desulfurization, Fly-Ash, Low-Temperature, Metal-Oxides, Methodology, Network, NN Model, NO, Removal, Rice Husk Ash, Rsm Model, Silica, SO₂, Sorbent, Sorption

? Perez-Gregorio, M.R., Garcia-Falcon, M.S., Martinez-Carballo, E. and Simal-Gandara, J. (2010), Removal of polycyclic aromatic hydrocarbons from organic solvents by ashes wastes. Journal of Hazardous Materials, 178 (1-3), 273-281.

Full Text: 2010\J Haz Mat178, 273.pdf

Abstract: Polycyclic aromatic hydrocarbons (PANs) can be formed during the refinery processes of crude petroleum. Their removal is of great importance. The same happens with other organic solvents used for the extraction of PAHs (hexane, acetonitrile...), which can be polluted with PAHs. Kinetic and equilibrium batch sorption tests were used to investigate the effect of wood ashes wastes as compared to activated carbon on the sorption of three representative PAHs from n-hexane and acetonitrile. Mussel shell ashes were discarded for batch sorption experiments because they were the only ashes containing PAHs. The equilibrium time was reached at 16 h. Physical sorption caused by the aromatic nature of the compounds was the main mechanism that governed the PAHs removal process. Our investigation revealed that wood ashes obtained at lower temperature (300 degrees C) did not show any PAHs sorption, while ashes obtained at higher temperature (>500 degrees C) have adsorbent sites readily available for the PAH molecules. An increase in the molecular weight of PAHs has a strong effect on sorption wood ashes wastes. As low the wood ashes particle size as high the sorption of PAHs, as a result of differences in adsorbent sites. The performance of wood ash wastes vs. activated carbon to remove 10 PAHs from organic solvents is competitive in price, and a good way for waste disposal. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Acetonitrile, Activated Carbon, Adsorption, Aqueous-Solutions, Batch, Compounds, Equilibrium, Extraction, Kinetic, Mobile Order Theory, Molecules, Mussel Shell, N-Hexane, Polycyclic Aromatic Hydrocarbons, Pyrene, Removal, Removal Efficacy, Soils, Sorption, Waste Disposal, Water, Weight, Wood Ashes Wastes

? Cotman, M. and Gotvajn, A.Ž. (2010), Comparison of different physico-chemical methods for the removal of toxicants from landfill leachate. Journal of Hazardous Materials, 178 (1-3), 298-305.

Full Text: 2010\J Haz Mat178, 298.pdf

Abstract: Our work was focused on investigation of different treatment procedures for the removal of toxic fractions from a landfill leachate, because sometimes the existing treatment in biological sequencing batch reactor (SBR) is not efficient enough, leading to a hazardous environmental impact of the present persistent and toxic compounds. The efficiency of the procedures used was monitored by chemical analyses and two toxicity tests (activated sludge and Vibrio fischeri). The existing SBR (HRT = 1.9 days) removed 46-78% of COD and 96-73% of NH4+-N. Experiments were conducted with three landfill leachate samples expressing significant difference in concentrations of pollutants and with low BOD5/COD ratio (0.06/0.01/0.03). The applied methods were air stripping, adsorption to activated carbon and zeolite clinoptilolite and Fenton oxidation. Air stripping at pH 11 was a viable treatment option for the removal of ammonia nitrogen (up to 94%) and reduction of toxicity to microorganisms. In the adsorption experiments in batch system with different concentration of PAC the most effective was the highest addition (50.0 g L-1) where 63-92% of COD was removed followed by significant reduction in toxicity to V. fischeri. In the column experiments with clinoptilolite 45/93/100% of NH4+-N as well as 25/32/39% of COD removal was attained. The removal efficiency for metals followed the sequence Cr > Zn > Cd > Ni. The procedure with zeolite was the second most efficient one regarding reduction of toxicity to both organisms. Fenton oxidation at molar ratio Fe2+:H2O2 = 1.0:10.0 assured 70-85% removal of COD but it only slightly reduced the toxicity. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Activated Carbon, Adsorption, Adsorption, Air Stripping, Batch, Biological Treatment, COD, Cod Removal, Compounds, Fenton Oxidation, Landfill Leachate, Microorganisms, Oxidation, PAC, pH, Removal, SBR, Sequencing Batch, Sewage, Sorption, System, Toxicity, Toxicity Identification, Toxicity Test, Treatment, Waste Landfills, Zeolite

? Sayin, S., Ozcan, F. and Yilmaz, M. (2010), Synthesis and evaluation of chromate and arsenate anions extraction ability of a N-methylglucamine derivative of calix[4]arene immobilized onto magnetic nanoparticles. Journal of Hazardous Materials, 178 (1-3), 312-319.

Full Text: 2010\J Haz Mat178, 312.pdf

Abstract: In this study, 5,17-bis-[(N-methylglucamine)methyl]-25,26,27,28-tetrahydroxy-calix[4]ar ene (3) was synthesized by the treatment of calix[4]arene with a secondary amine N-methylglucamine and formaldehyde. The calixarene derivative (3) was characterized by a combination of FTIR, H-1 NMR and elemental analyses. Followingly, using the macrocyclic building block, the compound 3 was immobilized by [3-(2,3-epoxypropoxy)propyl]trimethoxysilane-modified Fe3O4 magnetite nanoparticles (EPPTMS-MN). The prepared calix[4]arene immobilized material was characterized by a combination of Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and thermogravimetric analyses (TGA). Moreover, the studies regarding the removal of arsenate and dichromate ions from the aqueous solutions were also carried out by using the compound in solid-liquid extraction experiments. It was found that the calix[4]arene-based magnetic material has high extraction ability towards dichromate and arsenate anions in 66% (at pH 1.5) and in 86% (at pH 3.5), respectively. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Alkali, Aqueous Solutions, Arsenate, Arsenate Anion, Biomedical Applications, Calixarene, Calix[4]Arene, Chromium(VI), Complexation, Cr(VI), Diamide-Derivatives, Dichromate, Dichromate Anion, Drinking-Water, Evaluation, Fourier Transform Infrared, FTIR, Infrared, Magnetic Nanoparticles, Nanoparticles, NMR, pH, Receptors, Removal, Sorption, TEM, Treatment

? Sheng, G.D., Li, J.X., Shao, D.D., Hu, J., Chen, C.L., Chen, Y.X. and Wang, X.K. (2010), Adsorption of copper(II) on multiwalled carbon nanotubes in the absence and presence of humic or fulvic acids. Journal of Hazardous Materials, 178 (1-3), 333-340.

Full Text: 2010\J Haz Mat178, 333.pdf

Abstract: The adsorption of Cu(II) on multiwalled carbon nanotubes (MWCNTs) as a function of pH and ionic strength in the absence and presence of humic acid (HA) or fulvic acid (FA) was studied using batch technique. The results indicated that the adsorption is strongly dependent on pH but independent of ionic strength. A positive effect of HA/FA on Cu(II) adsorption was found at pH <7.5, whereas a negative effect was observed at pH >7.5. The adsorption isotherms can be described better by the Freundlich model than by the Langmuir model in the absence and presence of HA/FA. Adsorption isotherms of Cu(II) at higher initial HA/FA concentrations are higher than those of Cu(II) at lower FA/HA concentrations. The thermodynamic data calculated from temperature-dependent adsorption isotherms suggested that the adsorption was spontaneous and enhanced at higher temperature. Results of this work suggest that MWCNTs may be a promising candidate for the removal of heavy metal ions from aqueous solutions. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Activated Carbon, Adsorption, Adsorption Isotherms, Aqueous-Solution, Cu(II), FA, HA, Heavy-Metal Ions, Hydrogen-Storage, Isotherms, Langmuir, Mwcnts, Nanoparticles, Natural Organic-Matter, Nuclear-Magnetic-Resonance, pH, Removal, Sorption, Thermodynamic Data, Water

? Eftekhari, S., Habibi-Yangjeh, A. and Sohrabnezhad, S. (2010), Application of AlMCM-41 for competitive adsorption of methylene blue and rhodamine B: Thermodynamic and kinetic studies. Journal of Hazardous Materials, 178 (1-3), 349-355.

Full Text: 2010\J Haz Mat178, 349.pdf

Abstract: AlMCM-41 was applied for adsorption of methylene blue (MB) and rhodamine B (RB) in single and binary component systems. In the single component systems. AlMCM-41 represents higher adsorption capacity for MB than RB with the maximal adsorption capacity of 2.08×10^-4 and 8.74×10^-5 mol/g at 25ºC for MB and RB, respectively. In the binary component system, MB and RB exhibit competitive adsorption onto the adsorbent. The adsorption is approximately reduced to 94 and 79% of single component adsorption systems for MB and RB (initial concentration of 8×10^-6 M) at 25ºC. In single and binary component systems, kinetic and adsorption isotherm studies demonstrate that the data are following pseudo-second-order kinetic model and Langmuir isotherm. Effect of solution pH on the adsorption in single and binary component systems was studied and the results were described by electrostatic interactions. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorbent, Adsorption, Adsorption Capacity, Adsorption Isotherm, Adsorption Kinetic, Almcm-41, Aqueous-Solution, Basic Dye Removal, Bottom Ash, Capacity, Competitive, Competitive Adsorption, Concentration, Data, Isotherm, Kinetic, Kinetic Model, Kinetic Studies, Langmuir, Langmuir Isotherm, Mb, MCM-41, Methylene Blue, Model, Molecular-Sieves, Natural Zeolite, pH, Pseudo Second Order, Pseudo-Second-Order, Pseudo-Second-Order Kinetic Model, Rhodamine B, Rhodamine-B, Rights, Selective Mesoporous Adsorbents, Separation, Solution, Systems, Thermodynamic, Toluidine-Blue, Waste-Water

? Abu-Lail, L., Bergendahl, J.A. and Thompson, R.W. (2010), Adsorption of methyl tertiary butyl ether on granular zeolites: Batch and column studies. Journal of Hazardous Materials, 178 (1-3), 363-369.

Full Text: 2010\J Haz Mat178, 363.pdf

Abstract: Methyl tertiary butyl ether (MTBE) has been shown to be readily removed from water with powdered zeolites, but the passage of water through fixed-beds of very small powdered zeolites produces high friction losses not encountered in flow through larger sized granular materials. In this study, equilibrium and kinetic adsorption of MTBE onto granular zeolites, a coconut shell granular activated carbon (CS-1240), and a commercial carbon adsorbent (CCA) sample was evaluated. In addition, the effect of natural organic matter (NOM) on MTBE adsorption was evaluated. Batch adsorption experiments determined that ZSM-5 was the most effective granular zeolite for MTBE adsorption. Further equilibrium and kinetic experiments verified that granular ZSM-5 is superior to CS-1240 and CCA in removing MTBE from water. No competitive adsorption effects between NOM and MTBE were observed for adsorption to granular ZSM-5 or CS-1240, however there was competition between NOM and MTBE for adsorption onto the CCA granules. Fixed-bed adsorption experiments for longer run times were performed using granular ZSM-5. The bed depth service time model (BDST) was used to analyze the breakthrough data. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Activated Carbon, Activated-Carbon, Adsorption, Breakthrough, Contaminants, Drinking-Water, Equilibrium, Fixed-Bed, High-Silica Zeolites, Hydrophobic Molecular-Sieves, Kinetic, MTBE, MTBE Adsorption, Natural Organic-Matter, Nom, Oxidation, Removal, Water, Zeolite, ZSM-5

? Rocher, V., Bee, A., Siaugue, J.M. and Cabuil, V. (2010), Dye removal from aqueous solution by magnetic alginate beads crosslinked with epichlorohydrin. Journal of Hazardous Materials, 178 (1-3), 434-439.

Full Text: 2010\J Haz Mat178, 434.pdf

Abstract: Innovative magnetic alginate beads are used to remove organic pollutants from aqueous solution under different experimental conditions. These alginate beads (EpiMAB) are prepared by an extrusion technique and crosslinked with epichlorohydrin. They contain both magnetic nanoparticles and activated carbon (AC). With the addition of magnetic properties, the beads can be easily recovered or manipulated with an external magnetic field. Their capacity to adsorb pollutants is linked to encapsulated AC and to active sites coming from both magnetic nanoparticles and alginate. The efficiency of the beads as biosorbent for the removal of dyes is assessed using methyl orange (MO) and methylene blue (MB) as model molecules. The dye uptake is found to vary with the initial concentration and the charge of the adsorbed molecule. The Langmuir equation fits well the adsorption data with maximum adsorption capacities of 0.02 mmol/g for MO and 0.7 mmol/g for MB. Kinetics experiments are performed to evaluate the equilibrium time; the pseudo-second-order kinetic model adequately describes the experimental data. The influence of the pH of the solution on adsorption is also investigated and a comparison with alginate beads crosslinked by calcium ions is made. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Activated Carbon, Activated Carbon, Adsorbents, Adsorption, Adsorption, Adsorption Capacities, Alginate, Aqueous Solution, Beads, Behavior, Biosorbent, Biosorbents, Calcium, Capacity, Carbon, Charge, Comparison, Concentration, Data, Dye, Dye Removal, Dyes, Efficiency, Equilibrium, Experimental, Experiments, Extrusion, Ferrofluid, Field, Ions, Kinetic, Kinetic Model, Kinetics, Langmuir, Langmuir Equation, Magnetic, Magnetic Field, Magnetic Nanoparticles, Magnetic Properties, Magnetic Separation, MB, Media, Methyl Orange, Methylene Blue, Methylene-Blue, Mo, Model, Nanoparticles, Organic, Organic Pollutants, pH, Phase, Pollutants, Pseudo Second Order, Pseudo-Second-Order, Pseudo-Second-Order Kinetic Model, Removal, Removal of Dyes, Rights, Solution, Sorption, Uptake

? Li, Y., Yue, Q.Y. and Gao, B.Y. (2010), Adsorption kinetics and desorption of Cu(II) and Zn(II) from aqueous solution onto humic acid. Journal of Hazardous Materials, 178 (1-3), 455-461.

Full Text: 2010\J Haz Mat178, 455.pdf

Abstract: The adsorption kinetics of Cu(II) and Zn(II) from aqueous solution onto humic acid (HA) were investigated under different conditions. The results showed that HA was particularly effective for adsorbing heavy metals and that the effective pH range was above 6. The adsorption force was not single and dependent on solution pH. The experimental data were found to comply with the pseudo-second-order kinetic model with adsorption capacity, gem more close to the measured results. Increment of initial adsorbate concentration (1-4 mg/L) and temperature (283-303 K) are both favorable to adsorption process. Based on the desorption experiments, it is further indicated that the main adsorption force was complexation effect between organic ligands of HA surface and metal ions and the percentage of desorption is 50% for Cu and 30% for Zn, respectively. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Adsorption Capacity, Adsorption Kinetics, Aqueous Solution, Behavior, Capacity, Cobalt Desorption, Complexation, Concentration, Copper(II) Adsorption, Cu, Cu(II), Data, Desorption, Experimental, Experiments, Extraction, Force, Heavy Metals, Heavy-Metals, Humic Acid, Hydrotalcite, Ions, Kinetic, Kinetic Model, Kinetics, Ligands, Metal, Metal Ions, Metals, Model, Organic, pH, Pseudo Second Order, Pseudo-Second-Order, Pseudo-Second-Order Kinetic Model, Removal, Rights, Soil, Solution, Sorption, Surface, Temperature, Zn(II)

? Liu, Y.H., Xu, Z.Z., Wu, X.G., Gui, W.J. and Zhu, G.N. (2010), Adsorption and desorption behavior of herbicide diuron on various Chinese cultivated soils. Journal of Hazardous Materials, 178 (1-3), 462-468.

Full Text: 2010\J Haz Mat178, 462.pdf

Abstract: The adsorption-desorption behaviors of diuron were investigated in six cultivated soils of China. The effect of system pH and temperature were also studied. The data fitted the Freundlich equation very well. The adsorption Kr values indicated the adsorption of diuron in the six soils was in the sequence of black soil (D) > yellow earth (F) > paddy soil (B) > yellow-brown soil (C) > yellow-cinnamon soil (A) > lateritic red earth (E). The adsorption Kr and Freundlich exponents n were decreased when temperature was increased from 298 K to 318K. However, the Gibb’s free energy values were found less negative with the increasing temperature. Meanwhile, the extent of diuron adsorption on soil was at rather high level under low pH value conditions and decreased with increasing pH value. In addition, the desorption behavior of diuron in the six soils was in the sequence of lateritic red earth (E) > yellow-cinnamon soil (A) > paddy soil (B) > yellow earth (F) > yellow-brown soil (C) > black soil (D). At the same time, desorption hysteresis of diuron were observed in all of the tested soils. And the soil organic matter content may play an important role in the adsorption-desorption behavior. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Aqueous-Solution, China, Degradation, Desorption, Diuron, Endosulfan, F, Freundlich, Indian Soils, Metolachlor, Organic-Matter, Pesticides, pH, Soil, Soils, Sorption, Spectroscopy, System

? An, F.Q., Feng, X.Q. and Gao, B.J. (2010), Adsorption property and mechanism of composite adsorbent PMAA/SiO₂ for aniline. Journal of Hazardous Materials, 178 (1-3), 499-504.

Full Text: 2010\J Haz Mat178, 499.pdf

Abstract: In this paper, functional monomer methacrylic acid (MAA) was grafted onto the surface of silica gel particles using 3-methacryloxypropyl trimethoxysilane (MPS) as intermedia, and grafting particles PMAA/SiO2 were prepared. The adsorption properties and mechanism of PMAA/SiO2 towards aniline were researched through batch and column adsorption methods. The experimental results showed that PMAA/SiO2 possesses strong adsorption ability for aniline with interaction of hydrogen bond. The saturated adsorption amount could reach up to 140 mg g(-1). The empirical Langmuir isotherm was found to agree well with the equilibrium adsorption data. pH and temperature were found to have great influence on the adsorption amount. Finally, PMAA/SiO2 was observed to possess excellent reusability properties as well. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Adsorption Ability, Aniline, Batch, Design, Equilibrium, Hydrogen Bond, Ions, Isotherm, Langmuir, Langmuir Isotherm, MCM-41, Oxidation, pH, Photocatalysis, Poly(Methacrylic Acid), Removal, Silica, Silica Gel, Water

? Sheng, G.D., Shao, D.D., Ren, X.M., Wang, X.Q., Li, J.X., Chen, Y.X. and Wang, X.K. (2010), Kinetics and thermodynamics of adsorption of ionizable aromatic compounds from aqueous solutions by as-prepared and oxidized multiwalled carbon nanotubes. Journal of Hazardous Materials, 178 (1-3), 505-516.

Full Text: 2010\J Haz Mat178, 505.pdf

Abstract: The adsorption of 1-naphthylamine, 1-naphthol and phenol on as-prepared and oxidized multiwalled carbon nanotubes (MWCNTs) has been investigated. The results illustrated that both as-prepared and oxidized MWCNTs showed high adsorption capacity for the three ionizable aromatic compounds (IACs) studied. Oxidation of MWCNTs increased the surface area and the pore volume, and introduced oxygen-containing functional groups to the surfaces of MWCNTs, which depressed the adsorption of IACs on MWCNTs. Both Langmuir and Freundlich models described the adsorption isotherms very well and the adsorption thermodynamic parameters (Delta G degrees, Delta H degrees and Delta S degrees) were measured. The adsorption for 1-naphthylamine, 1-naphthol and phenol is general spontaneous and thermodynamically favorable. The adsorption of phenol is an exothermic process, whereas the adsorption of 1-naphthylamine and 1-naphthol is an endothermic process. Results of this work are of great significance for the environmental application of MWCNTs for the removal of IACs from large volume of aqueous solutions. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: 1-Naphthol, 1-Naphthylamine, Activated Carbon, Adsorption, Adsorption Capacity, Adsorption Isotherms, Aniline, Aqueous Solutions, Carbon Nanotubes, Compounds, Desorption, Equilibrium, Freundlich, Ionizable Aromatic Compounds, Isotherms, Kinetics, Langmuir, Multiwalled Carbon Nanotubes, Mwcnts, Nanomaterials, Organic-Chemicals, Oxidation, Phenol, Phenol, Pore, Removal, Sorption, Surfaces, Thermodynamic, Thermodynamic Parameters, Thermodynamics, Trihalomethanes, Water

? Wang, C., Ao, Y.H., Wang, P.F., Hou, J., Qian, J. and Zhang, S.H. (2010), Preparation, characterization, photocatalytic properties of titania hollow sphere doped with cerium. Journal of Hazardous Materials,