TITLE:
Adsorption of Cerium (IV) from Aqueous Solutions Using Activated Carbon Developed from Rice Straw
AUTHORS:
Ehsan Farahmand
KEYWORDS:
Activated Carbon, Cerium, Isotherms, Adsorption Kinetics, Temperature, pH
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.3,
March
29,
2016
ABSTRACT: In this study, the
adsorption of Cerium from synthetic solution containing cerium oxide is
investigated using activated carbon developed from rice straw that is activated
by H3PO4. SEM and FTIR techniques are used to examine
structural and morphological characteristics of rice straw and activated
carbon. The optimum conditions obtained with the highest adsorption include
contact time = 500 minutes, pH = 4, temperature = 35°C, cerium concentration =
300 ppm, and adsorbent dosage = 0.02 gr. The highest adsorption of Cerium is
determined by 4.13 mg/g. Adsorption kinetics of cerium and equilibrium behavior
is studied. It indicates that the adsorption process obeys Pseudo-first-order
kinetic model and Langmuir isotherm model. The results of this study show that
the activated carbon developed from rice straw activated by H3PO4 is a relatively effective adsorbent
for the adsorption of cerium from aqueous solution.