Novel adsorption and photocatalytic oxidation for removal of gaseous toluene by V-doped TiO2/PU under visible light

Pham, Thanh-Dong; Lee, Byeong–Kyu

doi:10.1016/j.jhazmat.2015.07.048

Cited by 83 publications

(34 citation statements)

References 40 publications

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“…In present study system was designed dynamically with a flow rate of 1 m/L. Pham et al 2 were able to remove 80% toluene vapors. They employed visible light with a wavelength of 400–700 nm and TiO 2 nanoparticles to remove toluene vapors from the air with a flow rate of 0.2 L/m and concentration of 200 ppm.…”

Section: Discussionmentioning

confidence: 99%

“…Masoud Rismanchian et al 26 at the study of gaseous toluene removal by using of the photocatalytic activity of TiO 2 coated on foam nickel metal, reported 30% as the optimal moisture. Dezhi et al 27 chose 25% moisture and Pham et al 2 preferred 50% to carry out photocatalytic processes. In this study, the moisture and environmental volatile compounds is reduced to zero by passing the air through silica gel and activated charcoal.…”

Section: Aterials and M Ethodsmentioning

confidence: 99%

“… 1 Many VOCs, such as benzene and chloroform, are known carcinogens to humans. 2 Toluene (C 6 H 5 CH 3 ) is a colorless, flammable liquid and due to the uncertainty of being carcinogenic, toluene is used as an alternative to benzene in many cases and as a solvent in the manufacture of chemicals such as paints, adhesives, rubber and leather. 3 Inhalation of toluene vapors can cause the adverse effects on human such as effects on the nervous system, causing a decline in thinking, memory and ability of muscle.…”

Section: Introductionmentioning

confidence: 99%

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Removal of toluene vapors from the polluted air with modified natural zeolite and titanium dioxide nanoparticles

et al. 2018

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Toluene is a colorless and flammab1le liquid with the same solubilizing capacity as benzene that is in many cases used as an alternative to benzene, because of the uncertainty of being carcinogens. Workers can be exposed to toluene by breathing the chemical. To avoid inhalation and dermal effects caused by exposure to toluene, solutions such as adsorption, thermal oxidation, membrane separation and photocatalytic processes are applied. In this study, removal of toluene vapors with modified natural zeolite and titanium dioxide nanoparticles was discussed. The natural zeolite was modified using chemical and thermal methods. The samples characterized by Brunauer-Emmet-Teller, Barrett-Joyner-Halenda, X-ray diffraction and scanning electron microscopy tests. After stabilization of TiO2 nanoparticles, the removal efficiency for the toluene vapors at a concentration of 50, 150 and 300 ppm were evaluated using a dynamic system. The results showed that the zeolite has a very porous surface and after modifying the context its specific surface area increased 2.54 times. The results of the adsorption capacity calculation and photocatalytic process showed that modified zeolite samples-TiO2 bed has greater efficiency in the adsorption capacity and better photocatalytic activity than a Ze-TiO2 bed. Ze-TiO2 bed was able to remove 26% of toluene vapors at the concentration of 50 ppm and inlet flow rate of 1 L/m, which was 1.26 times more than a bed Ze-TiO2. According to the results of this study, while modifying the natural zeolite increased desirable properties such as specific surface area and Si/Al ratio, but in comparison with similar studies with synthetic bed such as zeolite Y and ZSM-5, could not achieve desired results in a photocatalytic activity for its application in industry. However, because of its abundance in the world and Iran and therefore low cost of preparation and also due to its unique characteristics, it is recommended that more studies to be done about modifying and its application in photocatalytic processes.

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Section: Discussionmentioning

confidence: 99%

Section: Aterials and M Ethodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of toluene vapors from the polluted air with modified natural zeolite and titanium dioxide nanoparticles

et al. 2018

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“…e synthesized Fe-TiO 2 /Bent-Fe could absorb significant amount of incident light to generate huge amount of electrons and holes. en, the generated electrons and holes could react with H 2 O and O 2 , respectively, to produce strong oxidative radicals, including hydroxyl and superoxide anion radicals, for degradation of diazinon into harmless inorganic materials [38][39][40]. e total diazinon removal by both adsorption and photocatalytic degradation was approximately 58.3%.…”

Section: Photocatalytic Degradation Of Diazinonmentioning

confidence: 99%

Novel Removal of Diazinon Pesticide by Adsorption and Photocatalytic Degradation of Visible Light-Driven Fe-TiO₂/Bent-Fe Photocatalyst

Phương

Chu

Thuan

et al. 2019

Journal of Chemistry

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In the study, Fe was used as a dopant to enhance photocatalytic activity of TiO2. Then, the Fe-doped TiO2 was deposited on bentonite, which was pillared by Fe. The synthesized materials were characterized by SEM, XRD, UV-Vis, BET, and point of zero charge (pHPZC). Then, the synthesized materials were used for diazinon removal under both dark and visible light conditions to investigate adsorption and photocatalytic degradation abilities of the synthesized materials. The maximum diazinon adsorption capacity of the synthesized Fe-TiO2/Bent-Fe was 27.03 mg/g. The obtained results indicated that the Fe-TiO2/Bent-Fe exhibited high photocatalytic degradation activity for removal of diazinon even under visible light. The diazinon removal experiments were also conducted using different photocatalyst dosages, under different pH and light sources to figure the optimal conditions for removal processes. The obtained results indicated that optimal photocatalyst dosage and pH were 0.5 g/L and 4.5, respectively. Finally, the natural light generated from solar could be suitable used for diazinon removal by the synthesized Fe-TiO2/Bent-Fe.

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“…For the purpose of metabolizing benzene, catalytic oxidation and intermolecular electron transitions methods have been commonly applied, however, these methods are limited because of their low yields or strict requirement on lights of characteristic wavelengths678. Recently membrane separation processes have also become restricted due to the high cost91011.…”

mentioning

confidence: 99%

Potential application of an Aspergillus strain in a pilot biofilter for benzene biodegradation

Sun

Zhang

Duan

et al. 2017

Sci Rep

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A biofilter with fungus was developed for efficient degradation of benzene, which can overcome the potential risk of leakage commonly found in such services. Results indicated that the optimum parameter values were temperature 40 °C, pH 6, and 500 mg L−1 of the initial benzene concentration. Besides, the empty bed residence time and inlet load range of biofilter were set to 20 s and 21.23–169.84 g m−3 h−1 respectively. Under these conditions, this biofilter can obtain the maximum removal efficiency of more than 90%, the eliminating capacity could be up to 151.67 g m−3 h−1. Furthermore, scanning electron microscopy was used to investigate three filler materials for packing fungus biofilm. This is the first study introducing an Aspergillus strain for benzene removal and these results highlight that the development of this biofilter has the potential scaling-up application as gas-processing of industrial wastes.

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Novel adsorption and photocatalytic oxidation for removal of gaseous toluene by V-doped TiO2/PU under visible light

Cited by 83 publications

References 40 publications

Removal of toluene vapors from the polluted air with modified natural zeolite and titanium dioxide nanoparticles

Removal of toluene vapors from the polluted air with modified natural zeolite and titanium dioxide nanoparticles

Novel Removal of Diazinon Pesticide by Adsorption and Photocatalytic Degradation of Visible Light-Driven Fe-TiO₂/Bent-Fe Photocatalyst

Potential application of an Aspergillus strain in a pilot biofilter for benzene biodegradation

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Novel adsorption and photocatalytic oxidation for removal of gaseous toluene by V-doped TiO2/PU under visible light

Cited by 83 publications

References 40 publications

Removal of toluene vapors from the polluted air with modified natural zeolite and titanium dioxide nanoparticles

Removal of toluene vapors from the polluted air with modified natural zeolite and titanium dioxide nanoparticles

Novel Removal of Diazinon Pesticide by Adsorption and Photocatalytic Degradation of Visible Light-Driven Fe-TiO2/Bent-Fe Photocatalyst

Potential application of an Aspergillus strain in a pilot biofilter for benzene biodegradation

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Novel Removal of Diazinon Pesticide by Adsorption and Photocatalytic Degradation of Visible Light-Driven Fe-TiO₂/Bent-Fe Photocatalyst