Mürüvvet YURDAKOÇ, Elif ANT BURSALI, Serap BOZKURT SEYHAN

8687

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

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

Cationic starch (CS) was prepared by using epichlorohydrin (EPI) and 3-chloro-2-hydroxypropyltrimethy-lammonium chloride (CHPTMA) and ionic liquids (ILs) having different anionic groups [1-butyl-3-methyl imida-zolium tetra uoroborate (BMI+BF4), 1-butyl-3-methyl imidazolium bromide (BMI+Br), 1-butyl-3-methyl imida-zolium hexa uorophosphate (BMI+PF6), and 1-butyl-3-methyl imidazolium bis-[(tri uoromethyl)sulfonyl]imide (BMI+[(TF)2N])] were impregnated onto CS. Thorium(IV) ions were preconcentrated by using IL impregnated CS. The ef-fects of ILs were investigated for extraction of Th(IV) by CS and the results were compared. Th(IV) was preconcentratedwith approximately 73% sorption capacity by CS and increased up to 98%{100% for IL impregnated sorbents at pH 7.0.The sorption capacities of Th(IV) were 0.453 mmol g1, 0.399 mmol g1, 0.281 mmol g1, and 0.183 mmol g1forCS{BMI+Br, CS{BMI+[(TF)2N], CS{BMI+PF6and CS{BMI+BF4, respectively. The elution occurred with HCland NaOH solutions at pH 7.0.
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Turkish Journal of Chemistry-Cover
  • ISSN: 1300-0527
  • Yayın Aralığı: 6
  • Yayıncı: TÜBİTAK
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