کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
582350 1453166 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of polyimide from 5,5″-bis(bromomethyl)-2,2′:6′,2″-terpyridine and investigation of the polymer sorption behavior towards some metal ions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Synthesis of polyimide from 5,5″-bis(bromomethyl)-2,2′:6′,2″-terpyridine and investigation of the polymer sorption behavior towards some metal ions
چکیده انگلیسی
The synthesis of a terpyridine-based polyimide sorbent for solid-phase extraction (SPE) of some metal ions is described. For this purpose, 5,5″-bis(bromomethyl)-2,2′:6′,2″-terpyridine was polymerized with the corresponding diimide derivatives of dianhyrides to give polyimides utilizing terpyridine unit in the main chain. This polymer was used for its extraction capabilities for Pb(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II), at different pH. Under competitive conditions and at pH < 0.6, the selectivity order was Pb ≈ Cd ≈ Zn. Enhanced selectivity was observed at pH 3.5, the order was Cu > Ni > Zn ≈ Cd ≈ Pb. Quantitative recoveries > 97% were observed for all metals in case loading was stopped before reaching the point of breakthrough. As the synthesized polyimides are insoluble in water, solid-liquid extractions have been carried out and the resins sorption for mixture of basic and/or precious metals have been studied under various experimental conditions (reaction time and hydrochloric acid concentration).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 162, Issues 2–3, 15 March 2009, Pages 695-702
نویسندگان
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