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... showed that P4VP was adsorbed on bentonite. The good efficiency in removing chromium ions from acidic solutions was demonstrated by adsorption kinetics. Freundlich and Langmuir isotherm models were used to determine adsorption capacity of Bf, Bf0.06 and Bf0.3 composites at 25°C and at pH = 1. Th ...
Desalination 245 (2009)
Biosorption of lead(II) ions onto waste biomass of Phaseolus vulgaris L.: estimation of the equilibrium, kinetic and thermodynamic parameters
... the biosorption of lead(II) ions onto P. vulgaris L. waste is a spontaneous endothermic process. Keywords: Biosorption; Lead(II) ions; Isotherm; Kinetics; Thermodynamics 0011-9164/09/$– See front matter © 2009 Elsevier B.V. All rights reserve ...
Desalination 244 (2009)
Removal of chromium (VI) ions from aqueous solutions by using Turkish montmorillonite clay: effect of activation and modification
... and Dubinin–Radushkevich isotherm models were used to evaluate the equilibrium data at 20EC and regression coefficients were derived. Adsorption kinetics was analyzed using the firstorder and the pseudo-second-order kinetic models. Also, the effects of activation and modification on the adsorptio ...
Desalination 244 (2009)
... results indicate that acidic pH (1.5) supported the adsorption of DY-12 on activated carbon developed from orange peel. Furthermore, adsorption kinetics of DY-12 was studied and the rate of sorption was found to conform to pseudo-second-order kinetics with correlation coefficients equal unity unde ...
Desalination 238 (2009)
Adsorption behavior of cationic dyes on citric acid esterifying wheat straw: kinetic and thermodynamic profile
... study indicated that the adsorptions of dyes were spontaneous and endothermic. High temperatures favored the adsorption processes. Keywords: Kinetics; Thermodynamics; Cationic dye; Adsorption 0011-9164/08/$– See front matter © 2008 Elsevier B.V. All rights reserve ...
Desalination 230 (2008)
Calcium alginate beads from Laminaria digitata for the removal of Cu+2 and Cd+2 from dilute aqueous metal solutions
... a rough estimation of the operational and design parameters in flow column adsorption processes. Keywords: Alginate; Heavy metals; Fixed bed; Kinetics; Sorption 1. Introduction The increase of industrial activities has intensified environmental pollution and the deterioration of ecosystems ...
Desalination 224 (2008)
... rate constants for the three models were determined and the correlation coefficients were calculated. Adsorption followed pseudo-second-order rate kinetics for both sepiolite and PAC. The suitability of the kinetic models for the adsorption of nitrite on the sepiolite and PAC were investigated.
Desalination 223 (2008)
Effect of amine type modifier on the uptake behaviour of silica towards mercury(II) in aqueous solution
... using batch and column methods was studied. The maximum uptake values at 293 K were 1.70 and 3.50 mmol g–1 for MAMS and PAMS, respectively. Kinetics and thermodynamics data showed a pseudo-second order adsorption process with endothermic nature. Regeneration of the modified silica was performe ...
Desalination 247 (2009)
Kinetics of decolourization of malachite green from aqueous medium by maize cob (Zea maize): An agricultural solid waste
... maize cob can be used as an 3. 4. 5. 6. DES4177.3d 6/24/2009 12:39:59 DESALINATION Desalination 250 (2009) 94–105 www.elsevier.com/locate/desal Kinetics of decolourization of malachite green from aqueous medium by maize cob (Zea maize): An agricultural solid waste G.H. Sonawanea, V.S. Shrivastavab ...
Desalination 250 (2009)
Formation of disinfection by-products and applicability of differential absorbance spectroscopy to monitor halogenation in chlorinated coastal and deep ocean seawater
... in DO natural organic matter (NOM) was much lower than that for coastal marine NOM, which was also more active in forming brominated DBPs. The kinetics of seawater chlorination was relatively rapid, and high levels of DBPs were released within the first 20–30 min of reaction. The kinetics o ...
Desalination 176 (2005)