2006
DOI: 10.1080/07366290600952519
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A New Sorbent for Selective Separation of Metal: Polyethylenimine Methylenephosphonic Acid

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Cited by 28 publications
(17 citation statements)
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“…A number of sorbents, such as amberlite XAD [13], amberlite XAD-2-functionalized with 2-(2 I -benzothiazolylazo)-p-cresol (BTAC-XAD) [18], organically modified clay [19], modified silica gel [20][21][22][23], polyethylenimine methylenephosphonic acid (PEIMPA) [24], and calixarenes [25,26], have been used as solid-phase extraction materials. Among these, silica gel, especially when modified with different metal-chelating organic compounds and microorganisms [27][28][29][30][31], has received great attention due to a number of advantages, such as good mechanical and thermal stability, selectivity, no swelling, and easy regeneration [32].…”
Section: Introductionmentioning
confidence: 99%
“…A number of sorbents, such as amberlite XAD [13], amberlite XAD-2-functionalized with 2-(2 I -benzothiazolylazo)-p-cresol (BTAC-XAD) [18], organically modified clay [19], modified silica gel [20][21][22][23], polyethylenimine methylenephosphonic acid (PEIMPA) [24], and calixarenes [25,26], have been used as solid-phase extraction materials. Among these, silica gel, especially when modified with different metal-chelating organic compounds and microorganisms [27][28][29][30][31], has received great attention due to a number of advantages, such as good mechanical and thermal stability, selectivity, no swelling, and easy regeneration [32].…”
Section: Introductionmentioning
confidence: 99%
“…11 shows the extraction yield as a function of initial pH, where the extraction efficiency increases rapidly with increasing initial pH. It reaches a maximum value around pH 7.0 for fine particles and pH 6.0 for the large particles; this is due to the favorable conditions for the complex formation of neodymium with particles magnetic in this pH [33].The progressive decrease in the retention of neodymium ions at low pH is due to the competition of hydrogen with neodymium for sorption sites on particles magnetic and to the protonation of the active groups [21,22,33]. The dépro-tonation during the increase of pH returns the favorable approach of the cations [34].…”
Section: Effect Of Initial Phmentioning
confidence: 90%
“…Reactions were performed both by heating and under microwave irradiation [19,20]. In a second time, scope of application was extended to phosphonation of amine based polymers like PEI in aqueous solution, affording phosphonated PEI [21][22][23][24][25].…”
Section: Preparation Of Polymermentioning
confidence: 99%
“…They are very similar and contain different overlapping bands characteristic of the resin structure. A broad band in the 3600−3200 cm −1 region is characteristic of the O-H groups of the acid and residual hydration water (Abderrahim et al 2006;Lazar et al 2014). The peaks at about 2926 cm −1 are due to the aliphatic C-H stretching vibrations derived from the methyl groups in the main chain of resin.…”
Section: Ftir Studiesmentioning
confidence: 99%