Removal of Chromium Ions from Polluted Water by Highly Active Surface ZnO/ Activated Carbon: Kinetic and Thermodynamic Model
نویسندگان
1 National University of Science and Technology, Dhi Qar, Iraq
2 Al-Manara College For Medical Science, Maysan,Iraq
3 Mazaya university college, Iraq
4 Medical technical college, Al-Farahidi University, Iraq
5 Department of Pharmacy, Osol Aldeen University College, Baghdad, Iraq
6 Al-Nisour University College, Baghdad, Iraq
7 Al-Hadi University College, Baghdad, 10011, Iraq
doi
10.22052/JNS.2023.04.013چکیده
In this study, Activated carbon was prepared by simple method using stem a Punica granatum. The nano ZnO was prepared by Silybum marianum leaves extract and zinc sulfate (ZnSO4) (source of zinc oxide nanoparticles) with calcination at temperature at 600 °C. The activated carbon and nano ZnO as a binary composite were prepared by mixing a certain different ratio of activated carbon and zinc oxide nanoparticles by ultrasonicification. FTIR spectroscopy, Field-Emission Scanning Electron Microscope techniques (FESEM) and X-ray diffraction were used to characterize the synthesized compounds. The experimental data were fitted into two kinetic models: pseudo-first order and pseudo-second order. It was observed that pseud-second order describe the adsorption better than pseudo-first order kinetic models. Negative values of the thermodynamic functions (ΔG, ΔH, ΔS) of the adsorption declared that it is spontaneous, exothermic and the position of the adsorbed Cr+3 ions is more regularly after the adsorption process.
