TY - JOUR
T1 - Kinetics and statistical approach for 2,5-dichlorophenol degradation in short reaction times by solar TiO2/glass photocatalysis
AU - Morones-Esquivel, M. M.
AU - Núñez-Núñez, C. M.
AU - González-Burciaga, L. A.
AU - Hernández-Mendoza, J. L.
AU - Osorio-Revilla, G. I.
AU - Proal-Nájera, J. B.
N1 - Publisher Copyright:
© 2020, Universidad Autonoma Metropolitana Iztapalapa. All rights reserved.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - 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).
AB - 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).
KW - 2,5-dichlorophenol degradation
KW - Kinetics
KW - Short reaction times
KW - Solar heterogeneous photocatalysis
KW - Statistics
UR - http://www.scopus.com/inward/record.url?scp=85079117889&partnerID=8YFLogxK
U2 - 10.24275/rmiq/Cat732
DO - 10.24275/rmiq/Cat732
M3 - Artículo
AN - SCOPUS:85079117889
SN - 1665-2738
VL - 19
SP - 555
EP - 568
JO - Revista Mexicana de Ingeniera Quimica
JF - Revista Mexicana de Ingeniera Quimica
IS - 2
ER -