Removal of Acid Orange 7 dye from wastewater using combination of ultraviolet radiation, ultrasonic method, and MgO nanoparticles

Talaiekhozani, Amirreza; Chaleshtori, Abbas Heydari; Banisharif, Farhad; Eskandari, Zeinab; Nasiri, Mohammad; Aminsharei, Farham; Park, Junboum; Rezania, Shahabaldin; Bazrafshan, Maryam

doi:10.15171/ehem.2019.18

Cited by 3 publications

(1 citation statement)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The removal of certain dyes by UV radiation alone has been reported [36,37]. This means that a significant amount of some dyes, such as acid orange 7 dye, can be removed from water under UV radiation [38]. Therefore, an experiment was planned to ensure that a significant amount of the RR198 dye could not be removed under the irradiation of UV.…”

Section: Effect Of Amount Of Zno-ndmentioning

confidence: 99%

Application of ZnO-Nd Nano-Photocatalyst for the Reactive Red 198 Dye Decolorization in the Falling-Film Photocatalytic Reactor

Biglar

Talaiekhozani²,

Aminsharei

et al. 2021

Toxics

Self Cite

View full text Add to dashboard Cite

A large amount of Reactive red 198 (RR198) is released yearly into the environment. RR198 is toxic for human and aquatic creatures; therefore, it should be removed from wastewater before releasing into the environment. In this study, the nano ZnO-Nd -photo-catalyst for the first time was synthesized by the combustion method. First, the physical characteristics of the generated nano photocatalyst were evaluated using FESEM, XRD, Bandgap calculation, and FTIR analysis. Then, the ZnO-Nd nano-photocatalyst was suspended into the contaminated water with RR198 dye in a falling-film photocatalytic reactor. The effects of parameters such as the amount of H2O2, catalyst dose, pH, and initial concentration of dye were investigated during the experiments. Finally, the decolorization process with the falling-film photocatalytic reactor was optimized using response surface methodology (RSM). The physical characteristics showed that the average particle size of the synthesized ZnO-Nd was 40 nm. Doping ZnO with Nd reduced the photocatalyst energy bandgap by 14%. The results indicated that the optimum amount of catalyst dose and pH level was 0.1 g/L and 5, respectively. The simultaneous usage of H2O2 and ZnO-Nd with an H2O2/dye ratio of two increased dye removal performance by 90%. The results demonstrated that the developed equations can be applied to predict the performance of the falling-film photoreactor. This study showed that using the nano ZnO-Nd photocatalyst in a falling-film photocatalytic reactor under optimum operating conditions is an appropriate way to remove RR198 from water.

show abstract

Section: Effect Of Amount Of Zno-ndmentioning

confidence: 99%