A simple heterogeneous synthesis of pure adsorbent based polymer hybrid made by condensing a functionalized C,N-bipyrazole with a 3-glycidoxypropyl-trimethoxysilane silylant agent, previously anchored on a silica surface was developed. The formed material (SG2P) was characterized through elemental analysis, FT-IR spectroscopy, ¹³C NMR of solid state, scanning electron microscope (SEM), and was studied and evaluated by determination of the surface area using the BET equation, the adsorption and desorption capability using the isotherm of nitrogen and B.J.H. pore sizes. The new material exhibits good thermal stability determined by thermogravimetry curves and good chemical stability was examined in various acidic and buffer solutions (pH 1–7). The binding and adsorption abilities of SG2P were investigated for Hg²⁺, Cd²⁺, Pb²⁺, Zn²⁺, K⁺, Na⁺ and Li⁺ cations and compared to the results of classical liquid–liquid extraction with the unbound C,N-bipyrazole compound. The grafting at the surface of silica does not affect complexing properties of the ligand and the SG2P exhibits a high selectivity toward Hg²⁺ ion with no complexation being observed towards zinc and alkali metals. The extracted and the complexing cation percentages were determined by atomic absorption measurements.

العنوان

Talanta

الناشر

Elsevier

بلد الناشر

هولندا

Indexing

Thomson Reuters

معامل التأثير

4,244

نوع المنشور

Both (Printed and Online)

المجلد

143

السنة

2015

الصفحات

1-6