Efficient photocatalytic degradation of Safranin O by integrating solar-UV/TiO 2 /persulfate treatment: Implication of sulfate radical in the oxidation process and effect of various water matrix components

2017 ◽  
Vol 345 ◽  
pp. 80-91 ◽  
Author(s):  
Salim Bekkouche ◽  
Slimane Merouani ◽  
Oualid Hamdaoui ◽  
Mohamed Bouhelassa
Keyword(s):  
Photocatalytic Degradation ◽  
Oxidation Process ◽  
Sulfate Radical ◽  
Water Matrix ◽  
Treatment Implication ◽  
Solar Uv ◽  
Matrix Components ◽  
Safranin O

Stabilized landfill leachate treatment by coagulation-flocculation coupled with UV-based sulfate radical oxidation process

2018 ◽  
Vol 76 ◽  
pp. 575-581 ◽  
Author(s):  
Ahmad Razali Ishak ◽  
Fauziah Shahul Hamid ◽  
Sharifah Mohamad ◽  
Kheng Soo Tay
Keyword(s):  
Landfill Leachate ◽  
Oxidation Process ◽  
Sulfate Radical ◽  
Leachate Treatment ◽  
Radical Oxidation

Degradation of roxarsone in a sulfate radical mediated oxidation process and formation of polynitrated by-products

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 82040-82048 ◽  
Author(s):  
Yuefei Ji ◽  
Yuanyuan Shi ◽  
Deyang Kong ◽  
Junhe Lu
Keyword(s):  
Oxidation Process ◽  
Poultry Litter ◽  
Land Application ◽  
Sulfate Radical ◽  
Poultry Industry ◽  
By Products ◽  
Mediated Oxidation

Organoarsenicals such as roxarsone (ROX) are extensively utilized in the poultry industry, and land application of poultry litter is an important route by which arsenics are introduced into the environment.

Degradation of the antibiotic oxacillin in water by anodic oxidation with Ti/IrO 2 anodes: Evaluation of degradation routes, organic by-products and effects of water matrix components

2015 ◽  
Vol 279 ◽  
pp. 103-114 ◽  
Author(s):  
Ana L. Giraldo ◽  
Edgar D. Erazo-Erazo ◽  
Oscar A. Flórez-Acosta ◽  
Efraim A. Serna-Galvis ◽  
Ricardo A. Torres-Palma
Keyword(s):  
Anodic Oxidation ◽  
Water Matrix ◽  
Matrix Components ◽  
By Products

scholarly journals Enhanced Visible Light Photocatalytic Degradation of Methylene Blue by CdS-ZnS-BiPO4 Nanocomposites Prepared by a Solvent-Assisted Heating Method

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1095
Author(s):  
Hsin-Chan Tsai ◽  
Yu-Hui Peng ◽  
Po-Yu Wen ◽  
Tsunghsueh Wu ◽  
Yang-Wei Lin
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Separation Efficiency ◽  
Diffuse Reflectance Spectroscopy ◽  
Pond Water ◽  
Molar Ratio ◽  
Cds Nanoparticles ◽  
Heating Method ◽  
Water Matrix

In this study, a ternary CdS-ZnS-BiPO4 nanocomposite, synthesized by a solvent-assisted heating method, demonstrated the highest visible light-induced photocatalysis towards the degradation of methylene blue (MB) when comparing with BiPO4, CdS-BiPO4, and ZnS-BiPO4. Transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and UV-Vis diffuse reflectance spectroscopy (UV-vis DRS) were used to characterize the prepared nanocomposites. From UV-DRS results, the energy band gap of the prepared BiPO4 structures was 4.51 eV. When CdS nanoparticles were deposited on BiPO4 surface by a solvent-assisted heating method, the prepared nanocomposites exhibited visible light-responsive photocatalytic degradation toward MB (20 ppm). At a molar ratio of Cd to Zn as 1:7, the prepared CdS-ZnS-BiPO4 nanocomposites exhibited the best photocatalytic activity in degrading 95% of MB dyes, out-performing pure BiPO4, CdS-BiPO4, and ZnS-BiPO4 due to its enhanced charge separation efficiency and the lowered carrier recombination from the efficient p-n junction of unprecedented ternary composites. The investigations on mechanism conclude that the major reactive species responsible for MB degradation are holes and oxygen radicals. For practicality, the degradation efficiency for different dyestuff (Fast Green FCF, Rhodamine 6G, Acid Blue 1, methyl orange, and methyl red) degradation in the different water matrix samples (pond water, seawater, and lake water) by the prepared CdS-ZnS-BiPO4 nanocomposites was evaluated.

scholarly journals Influence of Operating Parameters on Photocatalytic Oxidation of 2,4-Dichlorofenol in Aqueous Solution by TiO2/Stainless Steel Photocatalytic Membrane

2021 ◽  
Vol 11 (24) ◽  
pp. 11664
Author(s):  
Liliana Bobirică ◽  
Constantin Bobirică ◽  
Giovanina Iuliana Lupu ◽  
Cristina Orbeci
Keyword(s):  
Stainless Steel ◽  
Photocatalytic Degradation ◽  
Photocatalytic Oxidation ◽  
Oxidation Process ◽  
Organic Substrate ◽  
Molar Ratio ◽  
Operating Parameters ◽  
Photocatalytic Reactor ◽  
Initial Concentration ◽  
Working Solution

The influence of some operating parameters of an UV photocatalytic reactor with TiO2/stainless steel photocatalytic membrane on the photocatalytic oxidation of 2,4-dichlorophenol from aqueous solutions was studied in this paper. It was shown that the pH of the working solution substantially influences the photocatalytic degradation of the organic substrate, with the degradation efficiency increasing with decreasing the pH of the working solution by a maximum corresponding to pH 3. The rate constant of the photocatalytic oxidation process is about twice as high at pH 3 comparative with pH 7 for the same initial concentration of the organic substrate. The molar ratio of hydrogen peroxide/organic substrate also influences the photocatalytic oxidation process of the organic substrate. The results obtained in this paper highlight the fact that a stoichiometric molar ratio is favorable for the photocatalytic degradation of 2,4-dichlorophenol. It has also been shown that the initial concentration of the organic substrate influences the rate of photocatalytic degradation. It appears that the rate of photocatalytic degradation decreases with the increasing of initial concentration of 2,4-dichlorophenol.

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