Degradation of Textile dye Direct Black 155 and Reactive Red 152 by Photocatalyst WO3

2021 ◽  
Vol 25 (9) ◽  
pp. 35-39
Author(s):  
K.S. Meena ◽  
Kanta Meena
Keyword(s):  
Photocatalytic Degradation ◽  
Environmental Problems ◽  
Textile Dye ◽  
Operational Parameters

The environmental problems are caused by different sorts of pollutants. Photocatalytic degradation of Direct black 155 and Reactive red 152 dye was examined by using U.V. light in photochemical reactor with WO3 photocatalyst. Varied operational parameters like catalyst dose, sort of dye and dye concentration were also investigated.

scholarly journals A study of photocatalytic degradation of textile dye CI basic yellow 28 in water using P160 TiO2 based catalyst

2012 ◽  
Vol 77 (12) ◽  
pp. 1747-1757 ◽  
Author(s):  
Veljko Djokic ◽  
Jelena Vujovic ◽  
Aleksandar Marinkovic ◽  
Rada Petrovic ◽  
Djordje Janackovic ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Textile Dye ◽  
Order Kinetic ◽  
Operational Parameters ◽  
First Order ◽  
Photodegradation Rate ◽  
Vis Spectroscopy ◽  
Langmuir Hinshelwood Mechanism ◽  
Order Kinetic Model ◽  
Alkaline Conditions

The photocatalytic degradation of synthetic textile dye CI Basic Yellow 28 (BY28) in water, using recently synthesized P160 TiO2 based catalyst, under Osram ultra-vitalux? lamp (300 W) light, was studied. The effect of the operational parameters such as initial concentration of catalyst, initial dye concentration and pH was studied. Salt effect was also investigated (NaCl, Na2CO3, Na2SO4, NaNO3). It was found that the optimal concentration of catalyst is 2.0 g L-1. A pseudo first-order kinetic model was illustrated using the Langmuir-Hinshelwood mechanism, and the adsorption equilibrium constant and the rate constant of the surface reaction were calculated (KBY = 6.126 L mg-1 and kC = 0.272 mg L-1 min-1, respectively). The photodegradation rate was higher in weak acidic than in high acidic and alkaline conditions. The presence of CO32- ions increases the photodegradation rate while Cl-, SO42- and NO3-ions decreases the reaction rate. The rate of photodegradation of BY28 was measured using UV-Vis spectroscopy.

scholarly journals Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2532 ◽  
Author(s):  
Md. Nahid Pervez ◽  
Felix Y. Telegin ◽  
Yingjie Cai ◽  
Dongsheng Xia ◽  
Tiziano Zarra ◽  
...  
Keyword(s):  
Butyl Alcohol ◽  
Textile Dye ◽  
Oh Radicals ◽  
Operational Parameters ◽  
Reaction Conditions ◽  
Tert Butyl Alcohol ◽  
Initial Ph ◽  
Fe Complex ◽  
Optimal Reaction ◽  
Activated Persulfate

In this study, a Fenton-activated persulfate (Fe2+/PS) system was introduced for the efficient degradation of Mordant Blue 9 (MB 9) as a textile dye in an aqueous solution. Results showed that the degradation of MB 9 was markedly influenced by operational parameters, such as initial pH, PS concentration, Fe2+ concentration, and initial dye concentration. Optimal reaction conditions were then determined. Inorganic anions, such as Cl− and HCO3−, enhanced the degradation efficiency of MB 9 under optimal conditions. Addition of HCO3− reduced the degradation performance of MB 9, whereas the addition of Cl− increased the degradation percentage of MB 9. In addition, quenching experiments were conducted using methanol and tert-butyl alcohol as scavengers, and methanol was identified as an effective scavenger. Thus, the degradation of MB 9 was attributed to S O 4 • − and •OH radicals. The degradation and mineralization efficiency of MB 9 was significantly reduced using the conventional Fenton process i.e., Fe2+/ hydrogen peroxide (HP) because of the formation of a Fe complex during degradation. Meanwhile, the Fe2+/persulfate (PS) system improved the degradation and mineralization performance.

scholarly journals Preparation of Glass Plate-Supported Nanostructure ZnO Thin Film Deposited by Sol-Gel Spin-Coating Technique and Its Photocatalytic Degradation to Monoazo Textile Dye

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Mohammad Hossein Habibi ◽  
Mohammad Khaledi Sardashti
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Photocatalytic Degradation ◽  
Spin Coating ◽  
Sol Gel ◽  
Glass Plate ◽  
Zno Thin Films ◽  
Visible Range ◽  
Textile Dye ◽  
Axis Orientation

Glass plate-supported nanostructure ZnO thin films were deposited by sol-gel spin coating. Films were preheated at275∘Cfor 10 minutes and annealed at 350, 450, and550∘Cfor 80 minutes. The ZnO thin films were transparent ca 80–90% in visible range and revealed that absorption edges at about 370 nm. Thec-axis orientation improves and the grain size increases which was indicated by an increase in intensity of the (002) peak at34.4∘in XRD corresponding to the hexagonal ZnO crystal. The photocatalytic degradation of X6G an anionic monoazo dye, in aqueous solutions, was investigated and the effects of some operational parameters such as the number of layer and reusability of ZnO nanostructure thin film were examined. The results showed that the five-layer coated glass surfaces have a very high photocatalytic performance.

Fluorescent carbon dot decorated MnO2 nanorods for complete photomineralization of phenol from water

2018 ◽  
Vol 4 (12) ◽  
pp. 2012-2020 ◽  
Author(s):  
Akansha Mehta ◽  
Amit Mishra ◽  
Soumen Basu
Keyword(s):  
Photocatalytic Degradation ◽  
Rate Constant ◽  
Phenol Degradation ◽  
Degradation Efficiency ◽  
High Rate ◽  
Operational Parameters ◽  
Carbon Dot ◽  
Fluorescent Carbon

Using MnO2@CQDs the photocatalytic degradation of phenol was tested and under optimum operational parameters, phenol degradation efficiency was found to be ∼90% with a high rate constant R = 0.029 min−1.

Sign in / Sign up

Export Citation Format

Share Document