Trace detection of La (III), Ce (III), Ce (IV), Nd (III), and Gd (III) using 2, 8, 14, 20-tetramethyl-5, 7-dinitro calix [4] resorcinarene polyhydroxamic acid by solid-phase extraction and separation

The quantitative trace determination and separation from individual rare earths is a difficult task, with this view a new synthesized and functionalised Calix[4]resorcinarene polyhydroxamic acid is used for sorption, speciation, sequential separation and trace determination of La (II), Ce (III), Ce...

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Bibliographic Details
Published in:	Reactive & functional polymers Vol. 190; p. 105642
Main Authors:	Sharma, Chandramauly, Patadia, Ritesh, Thakur, Bignesh, Pandya, Vamangi, Agrawal, Yadvendra
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-09-2023
Subjects:	Column separation Hydroxamic acid ICP – AES Nanogram determination Rare earths Hydroxamic acid Column separation ICP – AES Rare earths Nanogram determination
Online Access:	Get full text
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Summary:	The quantitative trace determination and separation from individual rare earths is a difficult task, with this view a new synthesized and functionalised Calix[4]resorcinarene polyhydroxamic acid is used for sorption, speciation, sequential separation and trace determination of La (II), Ce (III), Ce (IV), Nd (III) and Gd (III). The rare earths are quantitatively separated and trace determination in the range of 2–15 ng with the selectivity order La (III) > Ce (III) > Nd (III) > Gd (III). The column parameters like pH, flow rate and distribution were evaluated. The effect of various electrolytes and diverse metal ions in separation are studied. The present method is applied for estimation of rare earths in monazite and other geological specimens. Suitable eluents were used to effectuate the separations of the binary and ternary combinations. •New resin extracts La (III), Ce (III), Ce (IV), Nd (III), and Gd (III) from highly acidic waste streams effectively.•The developed resin exhibits high selectivity and efficiency in removing trace rare earth elements from complex environments with multiple coexisting ions and electrolytes.•The extraction efficiency of the resin is maintained even after being recycled as many as 30 times.•The technique holds promise for detecting ultra-trace levels of rare earth elements in monazite sand and other prevalent geological samples.
ISSN:	1381-5148
DOI:	10.1016/j.reactfunctpolym.2023.105642