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Sol-gel synthesized sorbents for Cu2+ and Cd2+ separation from solutions

A. POPA1,* , C. PACURARIU2, E. A. TACULESCU3, L. LUPA2

Affiliation

  1. Romanian Academy, Institute of Chemistry, 24 Mihai Viteazul Blv., RO-300223 – Timisoara, Romania
  2. ”Politehnica” University, Faculty of Industrial Chemistry and Enviromental Engineering, Physical Chemistry Department, Bul. V. Parvan 6, 300223 - Timisoara, Romania
  3. Romanian Academy- Timişoara Branch, Laboratory of Magnetic Fluids, Center for Fundamental and Advanced Technical Research, Bdul Mihai Viteazul 24, 300223 - Timişoara, Romania

Abstract

The aim of this work was synthesis and characterization of new hybrid materials by grafting phenylphosphonic acid on silica gels. The obtained hybrid were characterized by FT-IR spectroscopy, Thermal Analysis (TG, DTG, DTA), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). IR spectra indicate the formation of Si-O-P bonds, by the presence of a large band in the 850-1300 cm-1. Results obtained by the thermal analysis confirm the high stability of the obtained compounds. TEM and SEM micrographs showed the mesoporous structure of the analyzed materials. The adsorbant capacity of the obtained materials for removal of Cu2+ and Cd2+ ions from aqueous solution has been investigated. The maximum capacity of the synthesized hybrid materials was 2.016 mg/g for Cu2+, and 0.51 mg/g for Cd2+ ions. The obtained results allow us to propose utilization of these new hybrid materials as sorbents for the removal of heavy metal ions from aqueous solutions..

Keywords

Hybrid material, Sol-gel synthesis, Sorbent.

Citation

A. POPA, C. PACURARIU, E. A. TACULESCU, L. LUPA, Sol-gel synthesized sorbents for Cu2+ and Cd2+ separation from solutions, Optoelectronics and Advanced Materials - Rapid Communications, 4, 3, March 2010, pp.340-344 (2010).

Submitted at: Jan. 26, 2010

Accepted at: March 12, 2010