Kinetic and thermodynamic studies on the removal of Cr (VI) ions from aqueous solution using | ||
| Journal of Basic and Environmental Sciences | ||
| Volume 5, Issue 3, July 2018, Pages 222-229 PDF (270.24 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jbes.2018.370473 | ||
| Authors | ||
| Eman. A. Kamar1; Hisham. M. Aly1; Dalia. A. Amen2 | ||
| 1Department of chemistry, Faculty of Science, Benha University, Benha, Egypt, 13518 | ||
| 2Department of chemistry, Faculty of Science, Benha University, Benha, | ||
| Abstract | ||
| We have studied the removal of Cr (VI) ion from aqueous solution at different condition using n-ZVI. The n-ZVI was prepared via borohydrate reduction under inert atmosphere. The effect of temperature, concentration and loading quantities on kinetic and equilibrium of chromium ion removal using n-ZVI were thoroughly examined. The prepared n- ZVI was characterized by several techniques including X-ray diffraction (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM). The adsorption capacity was found to be 40 mg g-1 at pH 3.9 and 300 K. The pseudo second order was found to be the best fitting kinetic model. The adsorption activation energy was calculated and given to be 41.56 kJ mol-1 . The thermodynamic parameters ∆Go , ∆Ho and ∆So , were also calculated. The results indicate the endothermic and spontaneous nature of the adsorption process. | ||
| Keywords | ||
| Zero valent iron; Chromium; Thermodynamic; Kinetic; Nanoparticles | ||
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