Photocatalytic Removal of Reactive Black-5 Dye from Aqueous Solution by UV Irradiation in Aqueous TiO2: Equilibrium and Kinetics Study

Abstract. In this present study, the investigation of the photocatalytic removal of malachite green and brilliant blue dyes from their aqueous solution using photocatalytic oxidation process was provided. The application of factorial experimental design for the analysis the results was the main objective in the present study. The photocatalytic removal of Malachite Green (MG) and Brilliant Blue (BB) dyes was carried out in aqueous solutions containing the dye and suspended of ZnO upon UV irradiation (high pressure mercury lamp Radium 125 W). The effect of different factors such as initial dye concentration, sample volume and treatment time was taken in account. All samples of MG and BB have been analysed at 617 and 620 nm, respectively. The linearity ranged between 5 and 50 mg/L for MG dye while it was ranged between 20 and 200 mg/L for BB dye. The linear regression, R2, was more than 0.995 for both dyes. The results revealed that factorial experimental design analysis has given a better indication to investigate the effects of factors. It was observed that the most of factors are significant for both dyes. Initial concentration and treatment time factors were the most significant factors for MG and BB dyes, respectively according to pareto chart. Resumen. En este estudio se presenta una investigación sobre la remoción fotocatalítica de colorantes de verde de malaquita y azul brillante de soluciones acuosas mediante procesos de oxidación fotocatalítica. El objetivo principal de este trabajo fue la aplicación de un diseño experimental factorial para el análisis de los resultados. La remoción del verde de malaquita (MG) y azul brillante (BB) de soluciones acuosas se llevó a cabo mediante irradiación de luz UV en presencia de partículas de ZnO en suspensión. Para los experimentos, se usó una lámpara de mercurio a alta presión (Radium 125 W). Se consideraron los efectos de distintas variables, como la concentración inicial de cada colorante, el volumen de la muestra y el tiempo de tratamiento. Todas las muestras de MG y BB se analizaron a 617 y 620 nm, respectivamente. Se observó linealidad en los resultados en el intervalo de concentraciones entre 5 y 50 mg/L para el caso de MG, mientras que para el BB la linealidad se observó en el intervalo de concentraciones entre 20 y 200 mg/L. En ambos casos, los datos se ajustaron a modelos lineales con valores de R2 mayores a 0.995. Los resultados revelaron que el diseño experimental factorial permite investigar de mejor manera los efectos de diversos factores, encontrándose que la concentración inicial y el tiempo de tratamiento son los factores más importantes para la remoción de MG y BB, respectivamente, según se muestra en los gráficos de Pareto.

Download Full-text

Adsorption Equilibrium and Kinetics of Reactive Black 5 and Reactive Red 239 in Aqueous Solution onto Surfactant-Modified Zeolite

Journal of Chemical & Engineering Data ◽

10.1021/je7000057 ◽

2007 ◽

Vol 52 (5) ◽

pp. 1615-1620 ◽

Cited By ~ 84

Author(s):

Dogan Karadag ◽

Mustafa Turan ◽

Eda Akgul ◽

Sema Tok ◽

Ayşegül Faki

Keyword(s):

Aqueous Solution ◽

Adsorption Equilibrium ◽

Reactive Black 5 ◽

Modified Zeolite ◽

Equilibrium And Kinetics ◽

Adsorption Equilibrium And Kinetics ◽

Kinetics Of

Download Full-text

Equilibrium and kinetics study of uranium(VI) from aqueous solution by Citrus limetta peels

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-014-3165-3 ◽

2014 ◽

Vol 302 (1) ◽

pp. 451-457 ◽

Cited By ~ 10

Author(s):

Sachin C. Gondhalekar ◽

Sanjeev R. Shukla

Keyword(s):

Aqueous Solution ◽

Kinetics Study ◽

Equilibrium And Kinetics ◽

Citrus Limetta

Download Full-text

Adsorption of chloride ions from aqueous solution on γ-alumina modified by sodium oxide: an equilibrium and kinetics study

10.5004/dwt.2017.0958 ◽

2017 ◽

Vol 58 ◽

pp. 249-257

Author(s):

Masoud Gerami ◽

Rouein Halladj ◽

Rouholamin Biriaei ◽

Sima Askari ◽

Mehdi Nazari

Keyword(s):

Aqueous Solution ◽

Chloride Ions ◽

Sodium Oxide ◽

Kinetics Study ◽

Equilibrium And Kinetics

Download Full-text

Comments on “Adsorption Equilibrium and Kinetics of Reactive Black 5 and Reactive Red 239 in Aqueous Solution onto Surfactant-Modified Zeolite” (Karadag, D.; Turan, M.; Akgul, E.; Tok, S.; Faki, A.J. Chem. Eng. Data2007,52, 1615−1620)

Journal of Chemical & Engineering Data ◽

10.1021/je7004227 ◽

2008 ◽

Vol 53 (1) ◽

pp. 322-323 ◽

Cited By ~ 2

Author(s):

Saeid Azizian

Keyword(s):

Aqueous Solution ◽

Adsorption Equilibrium ◽

Reactive Black 5 ◽

Modified Zeolite ◽

Equilibrium And Kinetics ◽

Adsorption Equilibrium And Kinetics ◽

Kinetics Of

Download Full-text

Oxidation of Sulfonamides in Aqueous Solution by UV-TiO2-Fe(VI)

BioMed Research International ◽

10.1155/2015/973942 ◽

2015 ◽

Vol 2015 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Yan Ma ◽

Kejia Zhang ◽

Cong Li ◽

Tuqiao Zhang ◽

Naiyun Gao

Keyword(s):

Aqueous Solution ◽

Photocatalytic Degradation ◽

Conduction Band ◽

Uv Irradiation ◽

Photocatalytic Oxidation ◽

Ph Value ◽

Electron Acceptors ◽

Potassium Ferrate ◽

The Stability ◽

Complete Mineralization

The photocatalytic degradation of sulfonamides in aqueous TiO2suspension under UV irradiation has been investigated using potassium ferrate as electron acceptors. The results showed that the stability of Fe(VI) is dependent on pH significantly, and the stability reduces obviously in the presence of UV-TiO2. The experiments indicated that Fe(VI) could effectively scavenge the conduction band electrons from the surface of TiO2. The photocatalytic oxidation of sulfonamides with Fe(VI) was found to be much faster than that without Fe(VI). The SD, SM, and SMX concentration was greatly reduced by 89.2%, 83.4%, and 82.0%, respectively, after 10 min with UV-TiO2-Fe(VI), comparing to 65.2%, 66.0%, and 71.9%, respectively, with Fe(VI) only in the dark and 71.3%, 72.7%, and 76.0%, respectively, with UV-TiO2. The pH value of solution significantly influenced the sulfonamides degradation in UV-TiO2-Fe(VI) system. The degradation amount of sulfonamides after 10 min was a maximum at pH 7. The intermediate products of sulfonamides oxidation by UV-TiO2-Fe(VI) were analysed by LC-HESI-MS-MS and the results suggested that a majority of sulfonamides turned into large-molecule products without complete mineralization.

Download Full-text