Cinética y enfoque estadístico para la degradación de 2,5-diclorofenol en tiempos cortos de reacción por fotocatálisis solar TiO2/vidrio

Translated title of the contribution: Kinetics and statistical approach for 2,5-dichlorophenol degradation in short reaction times by solar TiO2/glass photocatalysis

M. M. Morones-Esquivel, C. M. Núñez-Núñez, L. A. González-Burciaga, J. L. Hernández-Mendoza, G. I. Osorio-Revilla, J. B. Proal-Nájera

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Aqueous 2,5-dichlorophenol (2,5-DCP) degradation was studied. Degradation was performed by solar photolysis and heterogeneous photocatalysis on TiO2 synthesized by sol-gel method. A thin film solar reactor of 1 m2 surface area was used. Solution was recirculated for 30 min under a laminar regime, with 20° and 26° surface slopes, under different temperatures and radiation. Samples were taken every 5 min to determine chemical oxygen demand (COD) and absorbance at λ= 280 nm. A 23 factorial with covariates and repeated measures experimental design was used to determine degradation kinetics of 2,5-DCP in short reaction times, having two response variables: COD and concentration of 2,5-DCP, determined at 280 nm. The factors were: Reactor inclination angles (20° and 26°), flow (355 L/h and 407 L/h) and process (photolysis and photocatalysis); and covariates: Solar radiation, temperature, evaporation and initial concentration of 2,5-DCP. By comparing the kinetic constants of both processes using Student-t statistic, significant differences (p <0.05) between them were found. Degradation reaction of 2,5-DCP in short times by solar photocatalysis, clearly showed a reaction order n = 1, reaching degradation of 75% (20 min), 83% (25 min) and up to 95% (30 min).

Translated title of the contributionKinetics and statistical approach for 2,5-dichlorophenol degradation in short reaction times by solar TiO2/glass photocatalysis
Original languageSpanish
Pages (from-to)555-568
Number of pages14
JournalRevista Mexicana de Ingeniera Quimica
Volume19
Issue number2
DOIs
StatePublished - 1 May 2020

Fingerprint Dive into the research topics of 'Kinetics and statistical approach for 2,5-dichlorophenol degradation in short reaction times by solar TiO<sub>2</sub>/glass photocatalysis'. Together they form a unique fingerprint.

Cite this