Modern Chemistry & Applications

Comparison of the nano-graphene oxide and a modified nano-graphene oxide almond shell in the remediation of Cd and Ni from the polluted aqueous solution

9^th Global Chemistry Congress

July 23-24, 2018 | Lisbon, Portugal

Mehrdad Cheraghi, Bahareh Lorestani, Nasibeh Yarimoghadam and Saeed Jamehbozorgi

Islamic Azad University, Iran

Posters & Accepted Abstracts: Mod Chem Appl

Abstract:

The present study describes the preparation and capability of the low-cost graphene oxide/almond shell (GO@AS) composite by a freeze-drying method. The composite showed excellent ability to uptake the nickel and cadmium ions, which were characterized by FTIR and SEM techniques. The optimized values of pH, contact time and adsorbent doses were found to be 7.5, 1-3 h and 0.1 g, respectively. Also, adsorption isotherms of metal ions on adsorbents were determined and correlated with common isotherm equations such as, Langmuir and Freundlich models. The obtained correlation coefficient (R2) for different adsorbents (GO and GO@ AS composite) suggested well-fitting of the experimental data to Langmuir isotherm for Ni2+ and Cd2+ ions (except adsorption of Cd2+ ion on the surface of GO). The maximum sorption capacities of GO@AS calculated from Langmuir isotherm model were 113.63 mg g-1 for Cd (II) and 64.10 mg g-1 for Ni (II). Interestingly, it was found that much higher adsorption capacity was achieved for Cd (II) on GO@AS than that for Ni (II) adsorption.

Biography :

E-mail: cheraghi_md@yahoo.com