Hemijska industrija 2011 Volume 65, Issue 2, Pages: 123-129
https://doi.org/10.2298/HEMIND101027077M
Full text ( 555 KB)
Cited by
Adsorption of cationic dye methylene blue onto activated carbon obtained from horse chestnut kernel
Momčilović Milan Z. (Faculty of Sciences and Mathematics, Department of Chemistry, Niš)
Purenović Milovan M. (Faculty of Sciences and Mathematics, Department of Chemistry, Niš)
Miljković Milena N. (Faculty of Sciences and Mathematics, Department of Chemistry, Niš)
Bojić Aleksandar Lj. (Faculty of Sciences and Mathematics, Department of Chemistry, Niš)
Ranđelović Marjan S. (Faculty of Sciences and Mathematics, Department of Chemistry, Niš)
Horse chestnut kernel was used as the precursor for the preparation of
powdered activated carbon using phosphoric acid as the activating agent.
Batch adsorption experiments for the adsorption of cationic dye methylene
blue from aqueous solutions were carried out using the obtained carbon as
adsorbent. Equilibrium and kinetic experiments were conducted. The
equilibrium data were fitted with the Langmuir, Freundlich and Temkin
theoretical isotherm models. The best results was obtained in the case of
Langmuir model, which indicates that monolayer adsorption occurs on finite
number of the active adsorption sites on the carbon surface. The kinetic data
were fitted with pseudo-first, pseudo-second, Elovich and interparticle
diffusion model. Pseudo-second order model and Elovich model showed the best
results of the kinetic data. The increasing of the solution pH led to a
higher uptake of methylene blue due to the fact that competitive adsorption
of methylene blue cation and proton exists in acidic solutions. The
adsorption capacity for methylene blue in equilibrium study was significant
(168.93 mg g-1). Comparison of the adsorption capacities of methylene blue
onto activated carbons derived from various alternative precursors proves
chestnut kernel to be efficient and low-cost material which could be
substantially deployed in the future.
Keywords: adsorption, methylene blue, chestnut kernel, activated carbon
More data about this article available through SCIndeks