Kinetics and Adsorption Isotherm Studies of Methylene Blue Photodegradation Under UV Irradiation Using reduced Graphene Oxide- TiO2 Nanocomposite in Different Wastewaters Effluents. | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Article 21, Volume 23, Issue 1, January 2019, Pages 253-263 PDF (495.34 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2019.26975 | ||
| Authors | ||
| Mohamed H. H. Ali; Mohamed E. Goher; Afify D. G. Al-Afify | ||
| Abstract | ||
| In this study TiO2@rGO nanoparticles was synthesized as an effective photocatalyst. Reduced graphene oxide (rGO) was mixed with TiO2 with different doping ratio (1%, 3% and 5% wt) and utilized to remove MB dye as organic pollutants from different wastewater effluents and also from aqueous solution. The impacts of different factors, e.g. pH of solution, contact time, photocatalyst dose and initial MB dye concentration on the removal efficiency were studied. The results showed that the highest MB degradation occurred at pH 9, contact time = 120 min, dose of photocatalyst of 0.75 g/L at 30 mg/l dye concentration. Also, the prepared nanocomposites success in reducing COD values of wastewater in the range of 30 – 89.1 %. Moreover, the data of kinetics studies indicated that the adsorption process well obeys the pseudo-second order reaction model with qe values ranged between 14.28 – 19.37 mg/L. Langmuir isotherm model well describes the behavior of adsorption behavior than Freundlich Model. | ||
| Keywords | ||
| Photodegradation; COD; Nanoparticles; Reduced Graphene oxide; MB dye; Wastewaters | ||
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