UV/H2O2 treatment of Rhodamine B in aqueous solution: Influence of operational parameters and kinetic modeling

Daneshvar, N.; Behnajady, Mohammad A.; Mohammadi, Mitra; Dorraji, Mir Saeed Seyed

doi:10.1016/j.desal.2007.11.012

Cited by 138 publications

(76 citation statements)

References 27 publications

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“…The pH decreased over the treatment period and the final values ranged from 4.7 to 6.5 (no data shown). This behavior was also reported by other authors (Braun and Oliveros 2002;Daneshvar et al 2008;Georgiou et al 2002;Zhou et al 2012), and it is probably related to the formation of acid species during oxidation process. Figure 7 clearly shows the reduction of residual COD as the [H 2 O 2 ]/COD ratio increases.…”

Section: Evaluation Of Uv-h 2 O 2 Processsupporting

confidence: 80%

Treatment of hospital laundry wastewater by UV/H2O2 process

Zotesso

Cossich

Janeiro

et al. 2016

Environ Sci Pollut Res

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Hospitals consume a large volume of water to carry out their activities and, hence, generate a large volume of effluent that is commonly discharged into the local sewage system without any treatment. Among the various sectors of healthcare facilities, the laundry is responsible for the majority of water consumption and generates a highly complex effluent. Although several advanced oxidation processes (AOPs) are currently under investigation on the degradation of a variety of contaminants, few of them are based on real wastewater samples. In this paper, the UV/HO AOP was evaluated on the treatment of a hospital laundry wastewater, after the application of a physicochemical pretreatment composed of coagulation-flocculation and anthracite filtration. For the UV/HO process, a photoreactor equipped with a low-pressure UV-C lamp was used and the effects of initial pH and [HO]/chemical oxygen demand (COD) ratio on COD removal were investigated through a randomized factorial block design that considered the batches of effluent as blocks. The results indicated that the initial pH had no significant effect on the COD removal, and the process was favored by the increase in [HO]/COD ratio. Color and turbidity were satisfactorily reduced after the application of the physicochemical pretreatment, and COD was completely removed by the UV/HO process under suitable conditions. The results of this study show that the UV/HO AOP is a promising candidate for hospital laundry wastewater treatment and should be explored to enable wastewater reuse in the washing process.

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Section: Evaluation Of Uv-h 2 O 2 Processsupporting

confidence: 80%

Treatment of hospital laundry wastewater by UV/H2O2 process

Zotesso

Cossich

Janeiro

et al. 2016

Environ Sci Pollut Res

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“…The effect of EE 2 concentration on the degradation rate was mainly due to the absorption of UV radiation by EE 2 molecules [28]. At high EE 2 concentrations, the penetration of photons entering into the solution decreased, so that an inner filter effect was induced and hence the solution became more and more impermeable to UV radiation [29]. Consequently, hydroxyl radical concentration decreased and EE 2 degradation rate reduced.…”

Section: Effect Of the Initial Ee 2 Concentrationmentioning

confidence: 99%

Kinetic degradation model and estrogenicity changes of EE2 (17α-ethinylestradiol) in aqueous solution by UV and UV/H2O2 technology

Zhang

Feng

et al. 2010

Journal of Hazardous Materials

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“…Hence, a figure-of-merit, electric energy per order (EE/O) was used to evaluate the cost efficiency of the optimum degradation process [29]. EE/O is the electrical energy (in kWh) required to degrade organic pollutant by one order of magnitude in 1000 US gal (3785 L) of water.…”

Section: Model Validation and Experimental Confirmationmentioning

confidence: 99%