Solar photocatalytic degradation of methylene blue in a fixed bed reactor

2017 ◽  
Vol 60 ◽  
pp. 285-289 ◽  
Author(s):  
Ouassila Benhabiles ◽  
Nadia Chekir ◽  
Nadia Chekir
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Fixed Bed ◽  
Fixed Bed Reactor

scholarly journals Photocatalytic Degradation of Paraquat Herbicide Using a Fixed Bed Reactor Containing TiO<sub>2</sub> Nanoparticles Coated onto <i>β-SiC</i> Alveolar Foams

2019 ◽  
Vol 10 (05) ◽  
pp. 171-184 ◽  
Author(s):  
Ignace Christian M’Bra ◽  
Grah Patrick Atheba ◽  
Didier Robert ◽  
Patrick Drogui ◽  
Albert Trokourey
Keyword(s):  
Photocatalytic Degradation ◽  
Fixed Bed ◽  
Fixed Bed Reactor

Fixed Bed Reactor for Removal of Methylene Blue Dye Using Heterogeneous Fenton Catalyst

2020 ◽  
Vol 24 (4) ◽  
pp. 04020037 ◽  
Author(s):  
Suraj Punathil ◽  
Damodhar Ghime ◽  
Titikshya Mohapatra ◽  
Chandrakant Thakur ◽  
Prabir Ghosh
Keyword(s):  
Methylene Blue ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Heterogeneous Fenton ◽  
Fenton Catalyst ◽  
Heterogeneous Fenton Catalyst

Heterogeneous photocatalytic degradation of 2-chloro-4-nitrophenol using slurry and fixed bed reactor

2014 ◽  
Vol 34 (2) ◽  
pp. 380-386 ◽  
Author(s):  
Anoop Verma ◽  
Divya Dixit ◽  
Amrit Toor ◽  
Jayant Srivastava
Keyword(s):  
Photocatalytic Degradation ◽  
Fixed Bed ◽  
Fixed Bed Reactor

Immobilization of PDMS-SiO2-TiO2 composite for the photocatalytic degradation of dye AO-7

2016 ◽  
Vol 74 (7) ◽  
pp. 1680-1688 ◽  
Author(s):  
Feigao Xu ◽  
Wencheng Tan ◽  
Heng Liu ◽  
Dan Li ◽  
Yuexiang Li ◽  
...  
Keyword(s):  
Thin Film ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Fixed Bed ◽  
Hydrophobic Surface ◽  
Fixed Bed Reactor ◽  
Photocatalytic Efficiency ◽  
Pumice Stone ◽  
Degradation Effect

Crack-free PDMS-SiO2-TiO2 composite as photocatalyst was prepared for degrading dyes by using thin-film fixed bed reactor. The hydrophobic surface of the photocatalyst loaded with PDMS-SiO2-TiO2 composite could be considered as an extractant for organic pollutants. The effect of different supports including pumice stone, medicinal stone, and fiberglass for photocatalytic efficiency were compared. Under the same condition, it was found that the photocatalytic degradation effect of dyes was best when PDMS-SiO2-TiO2 composite was fixed on pumice stone rather than medicinal stone or fiberglass. Furthermore, when pumice stone was used as the support for PDMS-SiO2-TiO2 composite, the photocatalytic degradation effect of dyes hardly decreased after five cycles.

Photocatalytic degradation of H-acid over a novel TiO2 thin film fixed bed reactor and in aqueous suspensions

2003 ◽  
Vol 156 (1-3) ◽  
pp. 179-187 ◽  
Author(s):  
M Noorjahan ◽  
M Pratap Reddy ◽  
V Durga Kumari ◽  
B Lavédrine ◽  
P Boule ◽  
...  
Keyword(s):  
Thin Film ◽  
Photocatalytic Degradation ◽  
Tio2 Thin Film ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Aqueous Suspensions

scholarly journals Fixed Bed Reactor Performance for Herbicide Degradation Under Solar Radiation

1970 ◽  
Vol 3 (1) ◽  
pp. 38-43
Author(s):  
Nadia Chekir ◽  
Djilali Tassalit ◽  
Mounir Mellal ◽  
Ouassila Benhabiles ◽  
Naima Sahraoui
Keyword(s):  
Titanium Dioxide ◽  
Solar Radiation ◽  
Photocatalytic Degradation ◽  
Fixed Bed ◽  
Chemical Oxidation ◽  
Fixed Bed Reactor ◽  
Polluted Water ◽  
Reactor Performance ◽  
Activated Carbon Adsorption ◽  
Herbicide Degradation

Photocatalysis has the best potential to replace the traditional wastewater treatment techniques such as activated carbon adsorption, chemical oxidation, and biological treatment. Photocatalysis is a combination of a catalyst semiconductor is titanium dioxide TiO2 with an ultraviolet light source as the sun. It has the added advantage of not introducing additives in the medium to be treated. However, when applied in slurry form, agglomeration of nanoparticle will lead to serious decrease in photocatalytic performance due to hinderance effect. Further, the present study has made an effort to use a support for the immobilization of catalyst for treating the pesticide polluted water by photocatalytic degradation. In the present paper, we present the performance of 2 kinds of Titanium dioxide (Commercial Media Ahlstrom and impregned TiO2 on glass) as photocatlytic support in fixed bed reactor for the degradation of Metribuzin herbicide under solar radiation. The degradation Performance was studied under various conditions such as substrate and pH solution. Solar photocatalytic degradation rate can reach 100% during 180 min of treatment with using TiO2 immobilized on commercial support media 1048.

Solar photocatalytic degradation of commercial textile azo dyes: Performance of pilot plant scale thin film fixed-bed reactor

Desalination ◽  
2009 ◽  
Vol 246 (1-3) ◽  
pp. 344-352 ◽  
Author(s):  
Ghanem Zayani ◽  
Latifa Bousselmi ◽  
Farouk Mhenni ◽  
Ahmed Ghrabi
Keyword(s):  
Thin Film ◽  
Photocatalytic Degradation ◽  
Azo Dyes ◽  
Pilot Plant ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Pilot Plant Scale

Study of Photodegradation of Methylene Blue by Microbial Synthesized ZnS Material

2018 ◽  
Vol 917 ◽  
pp. 190-194 ◽  
Author(s):  
Yi Bin Li ◽  
Qi Yuan Gu ◽  
Xing Yu Liu ◽  
Ming Jiang Zhang
Keyword(s):  
Methylene Blue ◽  
Fixed Bed ◽  
Order Rate Constant ◽  
Pilot Scale ◽  
Fixed Bed Reactor ◽  
Excellent Performance ◽  
First Order ◽  
Sulfate Reducing ◽  
First Order Kinetics ◽  
Reducing Bacteria

The microbial synthesized ZnS obtained from a pilot-scale sulfate reducing bacteria (SRB) fixed bed reactor was investigated as photocatalyst. The SRB fixed bed reactor as used to treat the Zinc containing wastewater with the influent concentration of 200~300 mg Zn/L. The microbial synthesized ZnS was used as photocatalyst for methylene blue (MB) photodegradation. The results indicated that the photodegradation process could be promoted when the dosage of microbial synthesized ZnS increased. High initial MB concentration could promote the photodegradation reaction. The excellent performance of microbial synthesized ZnS in photodegradation could be explained as the formation of ZnS nanoparticles. The photodegradation with microbial synthesized ZnS were simulated by pseudo-first-order kinetics model. The apparent first-order rate constant of the ZnS catalyst was 0.15 min-1.

Photocatalytic degradation of methylene blue from aqueous solutions using nanopillars-TiO2 thin films: Batch reactor studies

2018 ◽  
Vol 18 (3) ◽  
pp. 81-91 ◽  
Author(s):  
C. Lalhriatpuia
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Carbon ◽  
Photocatalytic Degradation ◽  
Batch Reactor ◽  
Tio2 Thin Films ◽  
Initial Concentration ◽  
Bet Specific Surface Area ◽  
Interfering Ions

Nanopillars-TiO2 thin films was obtained on a borosilicate glass substrate with (S1) and without (S2) polyethylene glycol as template. The photocatalytic behaviour of S1 and S2 thin films was assessed inthe degradation of methylene blue (MB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the SEM, XRD, FTIR and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data confirmed that the TiO2 particles are in its anatase mineral phase. The SEM and AFM images indicated the catalyst is composed with nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of MB was well studied at wide range of physico-chemical parameters. The effect of solution pH (pH 4.0 to 10.0) and MB initial concentration (1.0 to 10.0 mg/L) was extensively studied and the effect of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of MB was demonstrated. The maximum percent removal of MB was observed at pH 8.0 beyond which it started decreasing and a low initial concentration of the pollutant highly favoured the photocatalytic degradation using thin films and the presence of several interfering ions diminished the photocatalytic activity of thin films to some extent. The overall photocatalytic activity was in the order: S2 > S1 > UV. The photocatalytic degradation of MB was followed the pseudo-first-order rate kinetics. The mineralization of MB was studied with total organic carbon measurement using the TOC (total organic carbon) analysis.

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