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Application of a polymer inclusion membrane made of cellulose triacetate base polymer and trioctylamine for the selective extraction of bismuth( III ) from chloride solutions
Author(s) -
Ghaderi Narges,
Dolatyari Leila,
Kazemi Davood,
Sharafi Hamid Reza,
ShayaniJam Hassan,
Yaftian Mohammad Reza
Publication year - 2022
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.51480
Subject(s) - cellulose triacetate , bismuth , extraction (chemistry) , nuclear chemistry , plasticizer , membrane , hydrochloric acid , chloride , dichloromethane , dibutyl phthalate , chemistry , polymer , materials science , solvent , chromatography , inorganic chemistry , organic chemistry , biochemistry
A polymer inclusion membrane (PIM) prepared by casting a solution of cellulose triacetate (CTA), trioctylamine (TOA), and tri‐ n ‐butylphosphate (TBP), dissolved in dichloromethane was used for the extraction of bismuth(III) from hydrochloric acid solutions. The optimized PIM, in terms of mechanical properties and its efficiency for the extraction of bismuth(III), was consisted of CTA 40 wt%, TOA 25 wt%, and TBP 35 wt%. Contact angle measurements, FESEM, AFM, TGA, and stress–strain analysis were used for characterizing the PIM. A 3.5 cm diameter circular membrane segment of the PIM extracts quantitatively the bismuth ions (initial concentration 20 mg L −1 ) from 50 ml of 0.3 M HCl, after 120 min. The extracted bismuth was fully back‐extracted by shaking for 60 min of the loaded PIM with 50 ml solution of 2 M Na 2 CO 3 . It was confirmed that the extraction reaction involves the formation of the ion pairTOA H +2BiC l 5 2 −. The developed PIM was stable for using in four extraction/back‐extraction cycles of bismuth(III). This stability was enhanced to ten extraction/back‐extraction runs by replacing the plasticizer TBP with 2–nitrophenyloctyl ether or dibutyl phthalate. The investigated PIM showed excellent selectivity towards Bi(III) over Cu(II), Pb(II), Zn(II), Ni(II), Co(II), Cd(II), Fe(III), Cr(III), Mo(VI), W(VI), NO 3 − , and SO 4 2− .