Removal of Reactive Red 195 from aqueous solutions by adsorption on the surface of TiO2 nanoparticles

Belessi, Vassiliki; Romanos, G.; Boukos, N.; Lambropoulou, Dimitra A.; Trapalis, C.

doi:10.1016/j.jhazmat.2009.05.045

Cited by 166 publications

(87 citation statements)

References 49 publications

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“…Besides, the phenolate anions are mostly soluble in the aqueous solution, and stronger adsorbate-water bonds must be broken before adsorption can take place (Terzyk 2003). Similar result was reported for adsorption of reactive red 195 on TiO 2 nanoparticles (Belessi et al 2009). Thus, the rest of the experiments were performed at pH 2.…”

Section: Effect Of Initial Phsupporting

confidence: 71%

Removal of 4-chloro-2-nitrophenol occurring in drug and pesticide waste by adsorption onto nano-titanium dioxide

Mehrizad

Zare

Aghaie

et al. 2012

Int. J. Environ. Sci. Technol.

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The present study deals with removal of 4-chloro-2-nitrophenol (4C2NP) as a model contaminant from pharmaceutical and pesticide industries using titanium dioxide nanoparticles as an adsorbent. 4C2NP is recalcitrant and persistent toward biodegradation and its generation in aqueous environment during formulation, distribution and field application of pesticides is often unavoidable. Batch experiments were carried out to investigate the effect of contact time, nano-titanium dioxide dosage, initial pH, initial 4C2NP concentration and temperature on adsorption efficiency. The results showed that the adsorption capacity was increased with increasing 4C2NP concentration and temperature. Optimum conditions for 4C2NP adsorption were found to be initial pH & 2, nano-titanium dioxide dosage & 0.01 g/250 mL and equilibrium time & 1 h. Titanium dioxide nanoparticles recorded a maximum capacity of 86.3 mg/g at optimal conditions. The linear correlation coefficients of Langmuir, Freundlich and Temkin isotherms were obtained. The results revealed that the Freundlich isotherm fitted the experimental data better than the other isotherm models.

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Section: Effect Of Initial Phsupporting

confidence: 71%

Removal of 4-chloro-2-nitrophenol occurring in drug and pesticide waste by adsorption onto nano-titanium dioxide

Mehrizad

Zare

Aghaie

et al. 2012

Int. J. Environ. Sci. Technol.

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“…BET measurements revealed the surface area and mean pore radius of T TAB is 83.49 m 2 g -1 and 7.6 nm, respectively with ink-bottles shape. The lower value of surface area for T TAB can be related to the formation of agglomeration of the crystallites during preparation of TiO 2 using tetrabutylammonium bromide [16]. FTIR spectra of TiO 2 samples were performed to estimate the features of the chemical status of their surface.…”

Section: Resultsmentioning

confidence: 99%

Removal of Orange 2G Dye from Aqueous Solutions Using TiO2-Based Nanoparticles: Isotherm and Kinetic Studies

Al-Arfaj¹,

Alakhras²,

Alabbad³

et al. 2018

Asian J. Chem.

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In the current study, the removal of Orange 2G dye founded in aqueous solutions using titanium dioxide-based nanoparticles has been investigated. Titanium dioxide nanoparticles were successfully prepared using tetrabutyl ammonium bromide (TTAB) as a surfactant by sol-gel method and characterized by X-ray diffraction, BET surface area, IR and TEM spectroscopy. The experimental data is most fitting with Freundlich isotherm model indicating heterogeneity of sorbent surface. Langmuir data revealed that the maximum removal capacity of Orange 2G equals to 85.47 mg g -1 . Kinetic studies disclosed that intraparticle diffusion is not the only rate-determining step and the removal process is organized by a chemical reaction as well.

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“…When the saturation's constant of semiconductor oxide is exceed, the effect is adverse. Active sites of TiO 2 are blocked by excess dye, as observed at concentrations of 80 and 100 mg/L (25,26).…”

Section: Kinetics Removal and Rb5 (Imcrb5) Minimum Concentration Inhimentioning

confidence: 85%

Simultaneous decolorization and detoxification of black reactive 5 using TiO2 deposited over borosilicate glass

et al. 2012

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Objective. Removal and detoxification of azo dye by photocatalysis with TiO 2 . Materials and methods. TiO 2 films were prepared by sedimentation at pH 1.3, using as support a borosilicate glass, annealed for 1 hour at 450 °C. Physical characterization was performed by Scanning Electron Microscopy, X-ray diffraction and UV/VIS spectrometry. Dye Black Reactive 5 removal was carried-out in a quartz photo-reactor. Results. Optical characterization revealed the films displayed evident TiO 2 spherical particles of various irregular sizes, porous, and without fractures. The average crystal size was 77.5 nm and 77.7 nm for 50 °C (dried temperature) and 450 ºC (annealed temperature) respectively. The energy of the band gap (GAP) was 3.02 and 2.68 eV respectively. Maximum concentration of dye that negatively affected color removal was 80 mg/L (17%). At lower dye's concentrations (10, 50 and 70mg/L) decolorization was greater than 80%. TiO 2 films were reused for five consecutive cycles of 6 hours at 10 mg/L (>80%), and three cycles of 10 hours at 70 mg/L (> 80%). Toxicity results demonstrate that Daphnia magna was more sensitive than Lactuca sativa. Conclusions. TiO 2 films obtained by sedimentation demonstrated a high reactive black 5 decolorization and COD removal (86% and 100%), as well as toxicity reduction.Key words: photocatalysis with TiO 2 , sedimentation techniques, reactive black 5, Lactuca sativa and Daphnia magna. ResumenDecoloración simultánea y la desintoxicación de reactivo negro 5 con TiO 2 depositadas sobre el vidrio de borosilicato por la técnica de sedimentación. Objetivo. Decolorización y disminución de la toxicidad de un azo colorante usando fotocatálisis con TiO 2 . Materiales y métodos. Las películas de TiO 2 fueron crecidas por sedimentación a pH 1,3 empleando vidrio de borosilicato como sustrato. La caracterización física se realizó por medio de microscopía electrónica de barrido, difracción de rayos X y espectrometría de absorción UV/vis. Los estudios de remoción del colorante Negro Reactivo 5, se realizaron en un fotoreactor de cuarzo. Resultados. De acuerdo con la caracterización óptica, las películas de TiO 2 presentaron partículas esféricas, con diferentes tamaños, irregulares y sin fracturas. El tamaño del cristal fue 77,5 nm y 77,7 nm para 50 y 450º C y la energía de banda prohibida fue 3,02 y 2,68 eV, respectivamente. La concentración máxima del colorante que afectó negativamente la remoción de color fue 80 mg/L (17%). A concentraciones más bajas de NR5 (10, 50 y 70 mg/L) la decoloración fue superior al 80%. Las películas de TiO 2 se reutilizaron por 5 ciclos de 6 horas a 10 mg/L y 3 ciclos de 10 h a 70 mg/L. Los estudios de toxicidad en Lactuca sativa y Daphnia magna demostraron que D. magna fue más sensible que L. sativa. Conclusión. Las películas de TiO 2 crecidas por sedimentación decoloraron el colorante negro reactivo 5 en un 86% y removieron la demanda química de oxígeno en un y 100%, igualmente redujeron la toxicidad.Palabras clave: fotocatálisis con TiO 2 , técnica de sed...

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Removal of Reactive Red 195 from aqueous solutions by adsorption on the surface of TiO2 nanoparticles

Cited by 166 publications

References 49 publications

Removal of 4-chloro-2-nitrophenol occurring in drug and pesticide waste by adsorption onto nano-titanium dioxide

Removal of 4-chloro-2-nitrophenol occurring in drug and pesticide waste by adsorption onto nano-titanium dioxide

Removal of Orange 2G Dye from Aqueous Solutions Using TiO2-Based Nanoparticles: Isotherm and Kinetic Studies

Simultaneous decolorization and detoxification of black reactive 5 using TiO2 deposited over borosilicate glass

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