| Autor: |
H Kamel A; Chemistry Department, Faculty of Science, Ain Shams University, Abbasia 11566, Egypt., Hassan AA; Chemistry Department, Faculty of Science, Ain Shams University, Abbasia 11566, Egypt.; Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA., Amr AEE; Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.; Applied Organic Chemistry Department, National Research Center, Dokki 12622, Egypt., El-Shalakany HH; Chemistry Department, Faculty of Science, Ain Shams University, Abbasia 11566, Egypt., A Al-Omar M; Pharmaceutical Chemistry Department, Drug Exploration & Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia. |
| Abstrakt: |
In this research, CuFe 2 O 4 nanoparticles were synthesized by co-precipitation methods and modified by coating with thiophene for removal of Hg(II) ions from aqueous solution. CuFe 2 O 4 nanoparticles, with and without thiophene, were characterized by x-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), energy dispersive x-ray (EDX), high-resolution transmission electron microscopy (HRTEM) and Brunauer-Emmett-Teller (BET). Contact time, adsorbent dose, solution pH, adsorption kinetics, adsorption isotherm and recyclability were studied. The maximum adsorption capacity towards Hg 2+ ions was 7.53 and 208.77 mg/g for CuFe 2 O 4 and CuFe 2 O 4 @Polythiophene composite, respectively. Modification of CuFe 2 O 4 nanoparticles with thiophene revealed an enhanced adsorption towards Hg 2+ removal more than CuFe 2 O 4 nanoparticles. The promising adsorption performance of Hg 2+ ions by CuFe 2 O 4 @Polythiophene composite generates from soft acid-soft base strong interaction between sulfur group of thiophene and Hg(II) ions. Furthermore, CuFe 2 O 4 @Polythiophene composite has both high stability and reusability due to its removal efficiency, has no significant decrease after five adsorption-desorption cycles and can be easily removed from aqueous solution by external magnetic field after adsorption experiments took place. Therefore, CuFe 2 O 4 @Polythiophene composite is applicable for removal Hg(II) ions from aqueous solution and may be suitable for removal other heavy metals. |
