scholarly journals Mineralization of Azo Dye Using Combined Photo-Fenton and Photocatalytic Processes under Visible Light

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Selma K. Kuriechen ◽  
Sepperumal Murugesan ◽  
Samuel Paul Raj
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Carbon ◽  
Visible Light ◽  
Azo Dye ◽  
Coupled System ◽  
Nitrogen Doped ◽  
The Individual ◽  
Photocatalytic Processes ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis

Visible-light-assisted photodegradation of an azo dye, Reactive Red 180 (RR180), in the presence of nitrogen-doped TiO2 (N-TiO2) has been studied. The photodegradation of RR180 is evaluated through decolorization studies and total organic carbon analysis. The efficacy of hydrogen peroxide (H2O2), potassium peroxomonosulfate (oxone or PMS), and potassium peroxodisulfate (PDS) in improving the photodegradation of the dye in the N-TiO2-RR180 system is also examined. The effect of combining photo-Fenton-like reaction with N-TiO2-mediated photodegradation of RR180 under visible light has been investigated. The photoactivity of N-TiO2-RR180-Fe3+/Cu2+-oxidant systems is compared with the individual techniques of photocatalysis and photo-Fenton-like reactions. The coupled system possesses superior photomineralization ability towards the abatement of RR180.

Photodegradation of chlorpyrifos in water by UV/H2O2 treatment: toxicity evaluation

2013 ◽  
Vol 68 (10) ◽  
pp. 2279-2286 ◽  
Author(s):  
J. Femia ◽  
M. Mariani ◽  
C. Zalazar ◽  
I. Tiscornia
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Vibrio Fischeri ◽  
Organophosphorus Pesticide ◽  
Toxicity Evaluation ◽  
H2o2 Treatment ◽  
Initial Concentration ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis

Chlorpyrifos (CP) is an organophosphorus pesticide widely used in agriculture. Due to its toxicity, it has been necessary to develop a treatment to eliminate the environmental wastes generated by this substance. The combination of UV radiation and hydrogen peroxide seemed an interesting option to reduce the concentration of CP in water, as it has proved to be a simple and effective method to degrade other similar pesticides. The purpose of this work is to study the effect of different initial concentrations of H2O2 on the degradation of commercial CP in water using UV/H2O2. Conversions of 93% were achieved in 20 min with 450 mg L−1 of H2O2 initial concentration (0.16 mg of CP degraded per mg of H2O2 consumed). The total organic carbon analysis showed interesting mineralization values, reaching a 70% conversion after 4 h of reaction. In addition, this degradation procedure leads to a clear reduction of the toxicity of the reaction mixture over Vibrio fischeri.

High-resolution hyperspectral-based continuous mineralogical and total organic carbon analysis of the Eagle Ford Group and associated formations in south Texas

AAPG Bulletin ◽  
2020 ◽  
Vol 104 (7) ◽  
pp. 1439-1462 ◽  
Author(s):  
Ahmed Alnahwi ◽  
Tobi Kosanke ◽  
Robert G. Loucks ◽  
James Greene ◽  
Xiuju Liu ◽  
...  
Keyword(s):  
High Resolution ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
South Texas ◽  
Eagle Ford ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis

Interlaboratory methods comparison for the total organic carbon analysis of aquifer materials

1989 ◽  
Vol 23 (10) ◽  
pp. 1246-1249 ◽  
Author(s):  
Robert M. Powell ◽  
Bert E. Bledsoe ◽  
Gary P. Curtis ◽  
Richard L. Johnson
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Methods Comparison ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis

scholarly journals Measuring the Grafting Density of Nanoparticles in Solution by Analytical Ultracentrifugation and Total Organic Carbon Analysis

2012 ◽  
Vol 84 (21) ◽  
pp. 9238-9245 ◽  
Author(s):  
Denise N. Benoit ◽  
Huiguang Zhu ◽  
Michael H. Lilierose ◽  
Raymond A. Verm ◽  
Naushaba Ali ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Analytical Ultracentrifugation ◽  
Grafting Density ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis

scholarly journals Photocatalytic Degradation of Azo Dye Reactive Violet 5 on Fe-Doped Titania Catalysts under Visible Light Irradiation

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 645 ◽  
Author(s):  
Antonio Zuorro ◽  
Roberto Lavecchia ◽  
Marika Michela Monaco ◽  
Giuseppina Iervolino ◽  
Vincenzo Vaiano
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Textile Industry ◽  
Azo Dye ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Textile Effluents ◽  
Effects Of Ph ◽  
Doped Titania

The presence of azo dyes in textile effluents is an issue of major concern due to their potential impact on the environment and human health. In this study we investigate the photocatalytic degradation under visible light of Reactive Violet 5 (RV5), an azo dye widely used in the textile industry. A preliminary screening of different titania-based catalysts was carried out to identify the best candidate for RV5 removal. The selected catalyst was then tested in a stirred and aerated lab-scale reactor illuminated with a blue light-emitting diode (LED) source emitting in the wavelength range of 460–470 nm. The effects of pH, catalyst load, and hydrogen peroxide additions on the efficiency of dye removal were evaluated. Under the best conditions (pH 10, 3 g/L of catalyst, and 60 mM hydrogen peroxide), the dye solution was completely decolorized in about 2 h. Overall, the results obtained suggest that the proposed process may represent a suitable method for the removal of RV5 from textile effluents.

Method for quantifying the sample collected by an Andersen Cascade Impactor using total organic carbon analysis

2007 ◽  
Vol 38 (12) ◽  
pp. 1197-1206 ◽  
Author(s):  
Lia G. Rebits ◽  
David J. Bennett ◽  
Pradnya A. Bhagwat ◽  
Andrea Morin ◽  
Robert E. Sievers
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Cascade Impactor ◽  
Andersen Cascade Impactor ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis

scholarly journals Total Organic Carbon Analysis Chip Based on Photocatalytic Reaction

2020 ◽  
Vol 29 (2) ◽  
pp. 128-132
Author(s):  
Seung Deok Kim ◽  
Dong Geon Jung ◽  
Soon Yeol Kwon ◽  
Young Chan Choi ◽  
Jae Yong Lee ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Photocatalytic Reaction ◽  
Total Organic Carbon Analysis ◽  
Carbon Analysis
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