NDLI: Equilibrium , Kinetic and Thermodynamic Studies of the Adsorptive Properties Offonio ( Digitariaiburua ) Husks on Cadmium ( Ii ) Ions in Aqueous Solution

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Equilibrium , Kinetic and Thermodynamic Studies of the Adsorptive Properties Offonio ( Digitariaiburua ) Husks on Cadmium ( Ii ) Ions in Aqueous Solution

Content Provider	Semantic Scholar
Author	Gongden, J. J. Okoye, Stella Nnebedum, M. L. Kagoroand J.
Copyright Year	2016
Abstract	This study examined the adsorption characteristics of aqueous Cd(II) ions onto Digitariaiburua husks under batch mode. The effects of initial Cd(II) concentration, adsorbent dosage, initial solution pH, contact time and temperature on the adsorption process were studied. Maximum adsorption occurred at initial Cd(II) concentration of 15.0 mg/L, adsorbent dosage of 2.5 g, solution pH of 6.0 and 45 minutes contact time. It was observed that an initial increase in temperature enhanced the adsorption capacity of the adsorbent. The equilibriumdata were analyzed using Langmuir, Freundlichand Dubinin-Radushkevich (D-R) isotherm models. The results showed that the experimental data werebest fitted by the Freundlich model. Kinetic results revealed that the adsorption process followed the pseudo-second order model. The mechanism of adsorption showed that intra-particle diffusion was not the only rate controlling step. From the thermodynamic parameters, it can be said that the adsorptionprocess was feasible, spontaneous, endothermic, randomand physical in nature. The results obtained revealed that Digitariaiburua husks, an agricultural waste can serve as alternativelow-cost adsorbent for the removal of lead metal from aqueous solution like wastewaters.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.iosrjournals.org/iosr-jac/papers/vol9-issue11/Version-3/E0911032431.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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