Sorption studies of europium on cerium phosphate using Box-Behnken design

Authors : Suleyman INAN

Pages : 971-986

View : 18 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Amorphous cerium phosphate was prepared and characterized. Three-level Box-Behnken design insert ignore into journalissuearticles values(BBD); was employed to analyze the effect of process variables such as initial pH insert ignore into journalissuearticles values(2-6);, contact time insert ignore into journalissuearticles values(60-180 min);, and sorbent amount insert ignore into journalissuearticles values(0.05-0.15 g); on the sorption capacity of europium. Analysis of variance insert ignore into journalissuearticles values(ANOVA); revealed that the main effect of initial pH and sorbent amount has a substantial impact on the sorption of Euinsert ignore into journalissuearticles values(III);. Probability F-value insert ignore into journalissuearticles values(F = 3 x 10insert ignore into journalissuearticles values(-3);); and correlation coefficient insert ignore into journalissuearticles values(R-2 = 0.97); point out that the model is in good accordance with experimental data. The maximum sorption capacity of Euinsert ignore into journalissuearticles values(III); was found to be 42.14 mg ginsert ignore into journalissuearticles values(-1); at initial pH 6, contact time of 180 min, and a sorbent amount of 0.05 g. Sorption isotherm data was well explained by the Langmuir model and monolayer Euinsert ignore into journalissuearticles values(III); sorption capacity was obtained as 30.40 mg ginsert ignore into journalissuearticles values(-1);. Kinetic data were well described by the pseudo-second-order model. Thermodynamic data suggested that the process is endothermic and spontaneous.
Keywords : Sorption, europium, cerium phosphate, Box Behnken, separation