Removal of Selected Toxic Metals by a Modified Adsorbent

Atalay, Elif; Göde, Fethiye; Sharma, Yogesh Chandra

doi:10.1061/(asce)hz.1944-8376.0000023

Cited by 7 publications

(1 citation statement)

References 53 publications

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“…4a. Kinetic parameters such as k f , k s , q e,cal a, b and R 2 as listed in Table 3 were obtained from the slope and intercept of the straight-line plots not shown here (Wang et al 2006;Atalay et al 2009;Mohammod et al 2011;MontazerRahmati et al 2011). Table 3 demonstrates that correlation coefficient of second-order kinetic model was very close to unity in comparison with first-order and Elovich kinetic models.…”

Section: Sorption Kinetics and Equilibrium Isotherm Modelsmentioning

confidence: 99%

Adsorption of hexavalent chromium onto activated carbon derived from Leucaena leucocephala waste sawdust: kinetics, equilibrium and thermodynamics

Malwade

Lataye

Mhaisalkar

et al. 2016

Int. J. Environ. Sci. Technol.

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The adsorptive removal of Cr(VI) was studied using activated carbon derived from Leucaena leucocephala (ACLL). The physico-chemical properties of ACLL were determined using proximate analysis and N 2 BET surface area analysis. The N 2 BET surface area of ACLL was determined to be 1131 m 2 g -1 . The point of zero charge (pH pzc ) of 5.42 indicated that ACLL surface was positively charged for pH below the pH PZC , attracting anions. The effect of experimental operating parameters such as time of contact, ACLL dose, pH, initial concentration and temperature was investigated. The optimum values of parameters such as concentration of 100 mg L -1 , 300 mg of ACLL dose, time of contact of 60 min, pH of 4 indicated the maximum Cr(VI) uptake of 13.85 mg g -1 . The pseudo-second-order kinetic model best fitted with the Cr(VI) adsorption data. Adsorptive removal of Cr(VI) onto ACLL satisfactorily fitted in the order of Redlich-Peterson [ Freundlich [ Langmuir [ Temkin adsorption isotherm model. The thermodynamic parameters showed the adsorption of Cr(VI) onto ACLL was an endothermic and spontaneously occurred process.

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Section: Sorption Kinetics and Equilibrium Isotherm Modelsmentioning

confidence: 99%