Rheokinetic and efectiveness during the phenol removal in mescal vinasses with  a rotary disks photocatalytic reactor  (RDPR)

Gines-Palestino, Ruby; Rosa, Ear; Montalvo-Romero, Carlos; Cantú-Lozano, Denis

doi:10.24275/rmiq/cat673

Cited by 4 publications

(4 citation statements)

References 9 publications

(10 reference statements)

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“…Different physical, chemical, and biological treatments have been used for the removal and total or partial degradation of these recalcitrant contaminants present in water (Angulo-Mercado et al, 2012). Advanced oxidation processes (AOPs) are considered the most suitable for treating these types of substances due to the in situ generation of their powerful chemical oxidant, the hydroxyl radical ( • OH, 2.8 eV oxidative potential) (Wu and Chern, 2006;Núñez-Núñez et al, 2018;Gines-Palestino et al, 2020;Morones-Esquivel et al, 2020;Núñez-Núñez et al, 2020). One of these processes is heterogeneous photocatalysis, which mainly uses TiO 2 as a semiconductor and UV radiation as activation energy, achieving the degradation of recalcitrant substances when destroying their chemical bonds, by generating gaps in electron pairs as there is a reaction between the organic substances and water (López-Ojeda et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Methylthionine chloride degradation on pilot UV-C reactors: Kinetics of photolytic and heterogeneous photocatalytic reactions

Zaruma-Arias

Núñez-Núñez²,

Villanueva-Fierro

et al. 2021

RMIQ

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Section: Introductionmentioning

confidence: 99%

Methylthionine chloride degradation on pilot UV-C reactors: Kinetics of photolytic and heterogeneous photocatalytic reactions

Zaruma-Arias

Núñez-Núñez²,

Villanueva-Fierro

et al. 2021

RMIQ

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“…Annually, the production of this type of compounds is about 700,000-10,000,000 t [23][24][25], and ≈280,000 t of dyes are released into water bodies and end in traditional wastewater treatment plants [23,24] where they are considered urban wastes and treated with primary and secondary treatments but only reaching 20% and 60% of removal, respectively [26]. These substances can cause negative and counterproductive effects in water bodies, contaminating the ecosystem and the species that inhabit it [27]. This not only aesthetically affects an ecosystem but also causes a serious disturbance in photosynthetic activity due to the low penetration of solar radiation, progressing directly to living organisms [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Solar Heterogenous Photocatalytic Degradation of Methylthionine Chloride on a Flat Plate Reactor: Effect of pH and H2O2 Addition

et al. 2022

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Methylthionine chloride (MTC) is a compound with several applications both in the clinical and medical industries. Nevertheless, such compounds can become an environmental problem, as they are not properly treated by wastewater treatment plants. This objective of this work was to study MTC degradation in a flat plate reactor through solar photolysis and heterogeneous photocatalysis processes with TiO2 as a catalyst. In addition to the processes, three pH (3.5, 6.5, and 9) and the effect of H2O2 addition (no dose, 0.5, and 1 mM/L) were tested. The results show that acidic pH is the most appropriate for MTC degradation, which ranged between 56% and 68.7% for photolysis and between 76% and 86.7% in photocatalysis. The H2O2 addition resulted in lower degradation in all cases, leading the authors to conclude that the presence of peroxide actually hinders degradation in solar photolysis and photocatalysis processes. Statistical analysis showed that the constant rate reactions calculated for every process, under the same conditions of pH and H2O2 addition, are significantly different from one another, and the three factors considered for experimental design (process, pH, and H2O2) have a statistically significant effect on MTC degradation. The collector area per order confirmed higher efficiency for photocatalysis when compared to photolysis processes.

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“…In addition, several reactors have been used to immobilize enzymes such as OTC-IMER, MC-IMER, and capillary columns [12,25]. On the other hand, rotary disk reactors have been used for degradation because of their easy handling and low-cost energy consumption [26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Modification, and Characterization of Fe3O4@SiO2-PEI-Dextranase Nanoparticles for Enzymatic Degradation of Dextran in Fermented Mash

et al. 2022

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During the sugar production process, undesirable compounds such as dextrans are produced and contaminate the flow of the sugar mill, reaching levels in the fluid of more than 10,000 ppm. Dextranase is an enzyme that has different industrial applications, since it catalyzes the hydrolysis of the bonds in random sites of the dextran. Therefore, the enzyme was immobilized using synthesized ferrite magnetic nanoparticles to degrade dextran in the fermented mash, because it is suitable to reuse and has a large surface area to bind dextranase on a solid carrier for easy magnetic separation. The synthesized bare and modified nanoparticles were characterized using SEM, EDS, FTIR, and XRD and confirmed the core–shell silica by increasing the silica composition from 0.2% of bare Fe3O4 NPs to 31.3% of modified Fe3O4 NPs. Ultrasonic treatment reduced the calculated crystal size with Scherer’s equation from 91.3 to 13.5 nm, providing more particles for immobilization. The solvothermal process synthesized ferrite nanoparticles (Fe3O4) and modified them with TEOS and PEI. The obtained immobilization efficiency was 28%. Perhaps it was lower; Fe3O4 degraded almost the same as the free enzyme. The percentage of dextran degradation with free enzymes and immobilized enzymes with Fe3O4 magnetic nanoparticles was 61 and 52%, respectively.

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Rheokinetic and efectiveness during the phenol removal in mescal vinasses with a rotary disks photocatalytic reactor (RDPR)

Abstract: totales del petróleo intemperizados en suelos y sedimentos (Biodegradation modeling of sludge bioreactors of total petroleum hydrocarbons weathering in soil and sediments)

Cited by 4 publications

References 9 publications

Methylthionine chloride degradation on pilot UV-C reactors: Kinetics of photolytic and heterogeneous photocatalytic reactions

Methylthionine chloride degradation on pilot UV-C reactors: Kinetics of photolytic and heterogeneous photocatalytic reactions

Solar Heterogenous Photocatalytic Degradation of Methylthionine Chloride on a Flat Plate Reactor: Effect of pH and H2O2 Addition

Synthesis, Modification, and Characterization of Fe3O4@SiO2-PEI-Dextranase Nanoparticles for Enzymatic Degradation of Dextran in Fermented Mash

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