Impregnation of different ionic liquids onto cationic starch and their comparison in the extraction of Th(IV)

Authors : ELİF ANT BURSALI, SERAP SEYHAN BOZKURT, MÜRÜVVET YURDAKOÇ

Pages : 364-372

View : 16 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Cationic starch insert ignore into journalissuearticles values(CS); was prepared by using epichlorohydrin insert ignore into journalissuearticles values(EPI); and 3-chloro-2-hydroxypropyltrimethy- lammonium chloride insert ignore into journalissuearticles values(CHPTMA); and ionic liquids insert ignore into journalissuearticles values(ILs); having different anionic groups [1-butyl-3-methyl imidazolium tetrafluoroborate insert ignore into journalissuearticles values(BMI$^{+}$BF$_{4}^{-});$, 1-butyl-3-methyl imidazolium bromide insert ignore into journalissuearticles values(BMI$^{+}$Br$^{-});$, 1-butyl-3-methyl imidazolium hexafluorophosphate insert ignore into journalissuearticles values(BMI$^{+}$PF$_{6}^{-});$, and 1-butyl-3-methyl imidazolium bis-[insert ignore into journalissuearticles values(trifluoromethyl);sulfonyl]imide insert ignore into journalissuearticles values(BMI$^{+}$ [insert ignore into journalissuearticles values(TF);$_{2}$N]$^{-});$] were impregnated onto CS. Thoriuminsert ignore into journalissuearticles values(IV); ions were preconcentrated by using IL impregnated CS. The effects of ILs were investigated for extraction of Thinsert ignore into journalissuearticles values(IV); by CS and the results were compared. Thinsert ignore into journalissuearticles values(IV); was preconcentrated with approximately 73{\%} sorption capacity by CS and increased up to 98{\%}--100{\%} for IL impregnated sorbents at pH 7.0. The sorption capacities of Thinsert ignore into journalissuearticles values(IV); were 0.453 mmol g$^{-1}$, 0.399 mmol g$^{-1}$, 0.281 mmol g$^{-1}$, and 0.183 mmol g$^{-1}$ for CS--BMI$^{+}$Br$^{-}$, CS--BMI$^{+}$[insert ignore into journalissuearticles values(TF);$_{2}$N], CS--BMI$^{+}$PF$_{6}^{-}$ and CS--BMI$^{+}$BF$_{4}^{-}$, respectively. The elution occurred with HCl and NaOH solutions at pH 7.0.
Keywords : Thorium extraction, cationic starch, ionic liquids