Effect of temperature and photon absorption on the kinetics of micropollutant removal by solar photo-Fenton in raceway pond reactors

Pérez, J.A. Sánchez; Soriano-Molina, P.; Rivas, G.; Sánchez, José Francisco Fernandez; López, J.L. Casas; Sevilla, J. M. Fernández

doi:10.1016/j.cej.2016.06.055

Cited by 42 publications

(10 citation statements)

References 35 publications

(48 reference statements)

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“…The slight increase in the reaction rate could be probably due to the difference between average operation temperatures ( ca 5 °C), as it is well known that temperature plays a critical role in the photo‐Fenton process 30 . In general, an increase of temperature below 55 °C improves photo‐Fenton performance, whereas at higher temperature iron precipitation is favoured 31 . The resulting Q UV values also support the photosaturation and photolimitation explanations.…”

Section: Resultssupporting

confidence: 52%

A critical evaluation of the use of accumulated energy as a parameter for the scale‐up of solar photoreactors during the treatment of simulated industrial wastewater by solar photo‐Fenton

Cabrera‐Reina

Miralles-Cuevas

Soriano-Molina

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND This work presents a critical evaluation of the use of accumulated energy (QUV) as a parameter for the scale‐up of solar photoreactors. The combined effect of initial pollutant load, iron concentration and UV radiation on industrial wastewater treatment by solar photo‐Fenton was investigated to identify photolimitation and photosaturation conditions. RESULTS The assays were carried out using a flat‐plate collector (photoreactor with 12 and 20 mg L−1 of iron under average solar UVA irradiances in the range from 16 to 27 W m−2. In effluents with low initial organic load (45–90 mg L−1), the effect of the initial Fenton reaction was predominant against the contribution of solar radiation. Conversely, the contribution of solar radiation to the process performance was greater in effluents with the highest initial organic load (180–270 mg L−1). Within the range of solar radiation investigated, the process was photolimited when carried out with 20 mg L−1 of iron; however, with 12 mg L−1 of iron the process became photosaturated at irradiances above 15 W m−2. CONCLUSIONS Under photosaturation, the extra energy available that cannot be absorbed by the catalyst resulted in ca 60% overestimation of QUV, which can finally lead to 20–30% cost overrun due to photoreactor oversize. © 2021 Society of Chemical Industry

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Section: Resultssupporting

confidence: 52%

A critical evaluation of the use of accumulated energy as a parameter for the scale‐up of solar photoreactors during the treatment of simulated industrial wastewater by solar photo‐Fenton

Cabrera‐Reina

Miralles-Cuevas

Soriano-Molina

et al. 2021

J of Chemical Tech & Biotech

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“…In other words, the generation of HO• is proportional to H 2 O 2 consumption and stops when H 2 O 2 concentration is negligible. 23 To take into account the variability of the wastewater, experiments were performed in triplicate with effluent waters collected on three different days, and each wastewater was always treated by both strategies.…”

Section: Methodsmentioning

confidence: 99%

“…As such, the decrease in H 2 O 2 concentration with reaction time is used to monitor the photo‐Fenton treatment. In other words, the generation of HO• is proportional to H 2 O 2 consumption and stops when H 2 O 2 concentration is negligible …”

Section: Experimental Set Upmentioning

confidence: 99%

Does micropollutant removal by solar photo‐Fenton reduce ecotoxicity in municipal wastewater? A comprehensive study at pilot scale open reactors

Ibáñez

Bittner

Toušová

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND The reduction of toxicity in secondary effluents by solar photo‐Fenton has not been widely studied. In this present work, a strategy combining monitoring of micropollutants and application of a selected battery of bioassays has been applied to evaluate the effectiveness of the solar photo‐Fenton process for secondary effluent treatment at neutral pH in a raceway pond reactor (RPR) following two operating strategies: sequential iron dosage and the use of Fe(III)–EDDS complex at pilot plant scale. The applied battery of bioassays comprises in vivo (algal growth inhibition test) and in vitro, endocrine disruptor tests (androgenic/glucocorticoid activity and estrogenicity) and cytotoxicity tests. RESULTS The results obtained revealed high efficiency of micropollutant removal (>99%) by both strategies assayed. Regarding toxicity, androgenic/glucocorticoid activity and estrogenicity were efficiently removed in a similar fashion, and the relatively low potential phytotoxicity and cytotoxicity was also attenuated. Both RPR strategies are able to enhance the quality of municipal effluents from chemical and toxicological points of view. CONCLUSION To enable water reuse, the feasibility of solar photo‐Fenton reaction at neutral pH in open reactors for ecotoxicity and micropollutant removal in secondary municipal wastewater has been demonstrated for the first time. © 2017 Society of Chemical Industry

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“…The photo-Fenton process is based on the production of hydroxyl radicals through the reaction between hydrogen peroxide and iron and is usually carried out at acidic pH. The main reactions (Figure 1) of the process are, the Fenton reaction, which is the oxidation of ferrous iron by hydrogen peroxide consumption, generating hydroxyl radicals and ferric iron, and, after that, the photo-reduction of the ferric iron to ferrous iron in the presence of ultraviolet-visible (UV) radiation, giving rise to an iron-redox cycle (Figure 1) [22]. The environmental variables (UV and temperature) and characteristics of the reactor (liquid depth) condition the process and must be optimized to improve the removal of micropollutants.…”

Section: Model Backgroundmentioning

confidence: 99%

“…To achieve the highest possible efficiency during the elimination of ACTM, a detailed study of the variables that influence the solar photo-Fenton process is necessary. To this end, a simplified kinetic model was developed whereby ACTM removal can be predicted using environmental variables (UV irradiance and temperature), geometrical variables (light path length and reactor volume), and operating variables (reactants concentration and flow); the parameter that involves all these factors is the VRPA [22].…”

Section: Volumetric Rate Of the Photon Absorption (Vrpa) Mathematical...mentioning

confidence: 99%

Experimental study of wastewater micropollutant removal by solar photo‐Fenton using a virtual lab

Guadalupe Pinna‐Hernández,

Casas López,

Esteban García

et al. 2023

Comp Applic In Engineering

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New technologies are providing opportunities for the design of novel educational methodologies. Virtual laboratories can simulate real conditions, thus reducing the workload of teachers and students, and removing the costs associated with laboratory or pilot plant tests. The present work describes the creation of a virtual and interactive lab using the Easy JavaScript Simulation (EJsS) 6.0 tool. The solar photo‐Fenton process for the degradation of the Acetamiprid pesticide (ACTM) as a micropollutant model in wastewater was implemented in discontinuous mode in a stirred tank reactor (STR) and in continuous mode in a raceway pond reactor (RPR). The objective was to achieve a virtual tool that would allow easy, intuitive connection to different devices (laptops, tablets, and smartphones), simplifying the difficulties related to teaching technology. This contribution details the design and implementation process of the model for its use as support material for theoretical classes. The virtual tool presented in this article is an example of how the EJsS platform can be used to teach dynamics systems in chemical engineering.

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Effect of temperature and photon absorption on the kinetics of micropollutant removal by solar photo-Fenton in raceway pond reactors

Cited by 42 publications

References 35 publications

A critical evaluation of the use of accumulated energy as a parameter for the scale‐up of solar photoreactors during the treatment of simulated industrial wastewater by solar photo‐Fenton

A critical evaluation of the use of accumulated energy as a parameter for the scale‐up of solar photoreactors during the treatment of simulated industrial wastewater by solar photo‐Fenton

Does micropollutant removal by solar photo‐Fenton reduce ecotoxicity in municipal wastewater? A comprehensive study at pilot scale open reactors

Experimental study of wastewater micropollutant removal by solar photo‐Fenton using a virtual lab

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