Titanium dioxide-modified activated carbon for advanced drinking water treatment

Orha, Corina; Pode, Rodica; Manea, Florica; Lazău, Carmen; Bandas, Cornelia

doi:10.1016/j.psep.2016.07.013

Cited by 63 publications

(29 citation statements)

References 37 publications

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“…Aniline Benzothiazole According to Table 6, slight differences in the fitting of the experimental data were observed, with good results in general, except in the cases when the photocatalysis participates, and the pseudo second order model is considered (R 2 < 0.890). Supposing the overall photocatalysis process consist of an in-series combination of adsorption and photocatalysis steps, the lowest step kinetic will determine the rate of the overall process [46]. The pseudo first order model fitted the best overall process.…”

Section: Pollutantmentioning

confidence: 99%

Analysis of a Hybrid Suspended-Supported Photocatalytic Reactor for the Treatment of Wastewater Containing Benzothiazole and Aniline

Ferreiro

Villota

Lombraña

et al. 2019

Water

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In this work, a study of the main operating variables affecting TiO2/UV photocatalysis was carried out. The treatment of an industrial effluent containing aniline and benzothiazole from the manufacture of accelerants for vulcanization was performed in a TiO2-supported commercial photoreactor. The degradation of both contaminants was monitored by GC-MS analysis. The proposed experiments were able to properly identify the phenomenon of adsorption, as well as to improve the performance of the commercial photoreactor by adding small amounts of TiO2 in suspension. The removal performance, durability of the photocatalytic material, and energy costs were analysed. The results showed that the use of suspensions intensifies the degradation obtaining an improvement of 23.15% with respect to the use of the supported catalyst. For an aniline and benzothiazole solution, the best operating conditions were found at pH = 12.0, introducing 60.0 mg L−1 of suspended TiO2 together with the existing supported catalyst.

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Section: Pollutantmentioning

confidence: 99%

Analysis of a Hybrid Suspended-Supported Photocatalytic Reactor for the Treatment of Wastewater Containing Benzothiazole and Aniline

Ferreiro

Villota

Lombraña

et al. 2019

Water

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“…The most studied research has considered TiO 2 -based materials [26][27][28], and recently, cromite-type materials have raised a high interest due to their certain peculiarities for photocatalysis applications, e.g., small band-gap energy and chemical stability [29,30]. ZnCr 2 O 4 is considered a very important spinel compound, due to its potential application as an efficient catalyst, and its photocatalytic activity has been reported for the removal of organic dyes from wastewaters [6,31].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

et al. 2018

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Zinc chromite (ZnCr 2 O 4 ) has been synthesized by the thermolysis of a new Zn(II)-Cr(III) oxalate coordination compound, namely [Cr 2 Zn(C 2 O 4 ) 4 (OH 2 ) 6 ]·4H 2 O. The coordination compound has been characterized by chemical analysis, infrared spectroscopy (IR), and thermal analysis. The zinc chromite obtained after a heating treatment of the coordination compound at 450 • C for 1 h has been investigated by XRD, FE-SEM, TEM/HR-TEM coupled with selected area electron diffraction (SAED) measurements. The photocatalytic performance of nanosized zinc chromite was assessed for the degradation and mineralization of humic acid (HA) from a drinking water source, envisaging the development of the advanced oxidation process for drinking water treatment technology. A mineralization efficiency of 60% was achieved after 180 min of 50 mg L −1 HA photocatalysis using zinc chromite under UV irradiation, in comparison with 7% efficiency reached by photolysis.

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“…Various types of carbon and zeolite are reported as good sorbents for various types of pollutants from water [2,[15][16][17][18][19][20][21][22][23][24]. The easy separation of these materials from water and their good sorption capacity that is important in the first stage of the overall photocatalysis process make them very promising as support for the TiO 2 immobilization.…”

Section: Tio 2 -Based Composite Application For Sorption and Photocatmentioning

confidence: 99%

“…• Composites with TiO 2 coated (supported) on the support of activated carbon by the type of powder and granular and zeolite [15][16][17][18][19][20][21] • Hybrid composites, which comprise a matrix material of polymer (epoxy) in which TiO 2 and the support of carbon nanotubes or nanofibers are dispersed [22][23][24] Taking into account that the catalyst represents the key of the performance of the photocatalytic application, the catalyst-based composite should exhibit various effects related to the components and the obtaining methods [14], such as simple supporting effect, stabilizing the microstructure or active components, formation of new compounds which act as active components or stabilizers, having two or more functions, controlling of redox performances, and influencing the kinetics of adsorption/desorption and diffusion of molecules.…”

Section: Introductionmentioning

confidence: 99%

Carbon-/Zeolite-Supported TiO2 for Sorption/Photocatalysis Applications in Water Treatment

Manea¹,

Orha²

2019

Photocatalysts - Applications and Attributes

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The role of various carbon forms, i.e., activated carbon and carbon nanotubes/nanofibers as support for TiO 2 in drinking water treatment, is discussed. Also, TiO 2 supported onto zeolite that acts bifunctionally as a sorbent/photocatalyst for drinking water treatment is presented. The main contaminants of natural organic matter (NOM), arsenic species, and nitrogen compounds from drinking water sources by the type of groundwater and surface water can be removed/degraded by sorption/photocatalysis using TiO 2 supported onto carbon and/or zeolite. TiO 2 supported on powdered activated carbon (PAC-TiO 2), granular activated carbon (GAC-TiO 2), and zeolite (Z-TiO 2), namely, supported TiO 2 , was synthesized through the sol-gel method, and TiO 2 and multiwall carbon nanotubes/ carbon nanofibers dispersed within epoxy matrix (CNT-TiO 2-Epoxy, CNF-TiO 2-Epoxy), namely, TiO 2 composite, were obtained through the two-roll mill method. Kinetic study results through specific mathematic models allowed to elucidate some mechanistic aspects for sorption and photocatalysis for the application in drinking water. The intercalation of the carbon-and zeolite-supported TiO 2 layers into a filtering system allows to develop a self-cleaning filtering system in drinking water.

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Titanium dioxide-modified activated carbon for advanced drinking water treatment

Cited by 63 publications

References 37 publications

Analysis of a Hybrid Suspended-Supported Photocatalytic Reactor for the Treatment of Wastewater Containing Benzothiazole and Aniline

Analysis of a Hybrid Suspended-Supported Photocatalytic Reactor for the Treatment of Wastewater Containing Benzothiazole and Aniline

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Carbon-/Zeolite-Supported TiO2 for Sorption/Photocatalysis Applications in Water Treatment

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