Molecular structure effects on the kinetics of hydroxyl radical addition to azo dyes

2002 ◽  
Vol 15 (5) ◽  
pp. 287-292 ◽  
Author(s):  
Hugo Destaillats ◽  
Adrián G. Turjanski ◽  
Darío A. Estrin ◽  
Michael R. Hoffmann
Keyword(s):  
Molecular Structure ◽  
Hydroxyl Radical ◽  
Azo Dyes ◽  
Radical Addition ◽  
Kinetics Of

Mechanism and kinetics of diuron oxidation by hydroxyl radical addition reaction

2020 ◽  
Vol 27 (11) ◽  
pp. 12080-12095
Author(s):  
Gunasekaran Manonmani ◽  
Lakshmanan Sandhiya ◽  
Kittusamy Senthilkumar
Keyword(s):  
Hydroxyl Radical ◽  
Addition Reaction ◽  
Radical Addition ◽  
Mechanism And Kinetics ◽  
Kinetics Of

An ab Initio Study of the Kinetics of the Reactions of Halomethanes with the Hydroxyl Radical. Part 1: CH2Br2

2000 ◽  
Author(s):  
Florent Lous ◽  
Robert E. Huie ◽  
Michael J. Kurylo
Keyword(s):  
Hydroxyl Radical ◽  
Ab Initio ◽  
Ab Initio Study ◽  
Kinetics Of

scholarly journals Kinetics of Substituted Bis- and Mono-azo Dyes as Corrosion Inhibitors for Aluminium in Hydrochloric Acid and Sodium Hydroxide Solutions

1999 ◽  
Vol 23 (7) ◽  
pp. 408-409
Author(s):  
Loutfy H. Madkour ◽  
R. M. Issa ◽  
I. M. El-Ghrabawy
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Azo Dyes ◽  
Thermodynamic Model ◽  
Corrosion Inhibitors ◽  
Kinetics Of ◽  
Alkaline Corrosion

This investigation is designed to apply an advanced kinetic–thermodynamic model on the data obtained from acidic and alkaline corrosion of aluminium using bis- and mono-azo dyes as corrosion inhibitors.

Dipole moment and molecular structure. Part XVII. The dipole moments of azo-dyes and some similar substances

1936 ◽  
Vol 32 ◽  
pp. 1318 ◽  
Author(s):  
Ernst Bergmann ◽  
Anna Weizmann
Keyword(s):  
Molecular Structure ◽  
Dipole Moment ◽  
Azo Dyes ◽  
Dipole Moments

Soil-pH and cement influence the weathering kinetics of chrysotile asbestos in soils and its hydroxyl radical yield

2021 ◽  
pp. 128068
Author(s):  
Martin Walter ◽  
Gerald Geroldinger ◽  
Lars Gille ◽  
Stephan M. Kraemer ◽  
Walter D.C. Schenkeveld
Keyword(s):  
Hydroxyl Radical ◽  
Soil Ph ◽  
Chrysotile Asbestos ◽  
Kinetics Of ◽  
Radical Yield

scholarly journals Congo Red Decolorization and Detoxification by Aspergillus niger: Removal Mechanisms and Dye Degradation Pathway

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Nedra Asses ◽  
Lamia Ayed ◽  
Neila Hkiri ◽  
Moktar Hamdi
Keyword(s):  
Molecular Structure ◽  
Aspergillus Niger ◽  
Azo Dyes ◽  
Lignin Peroxidase ◽  
Congo Red ◽  
Manganese Peroxidase ◽  
Dye Degradation ◽  
Degradation Pathway ◽  
Effects Of Ph ◽  
Maximum Decolorization

Congo red is one of the best known and used azo dyes which has two azo bonds (-N=N-) chromophore in its molecular structure. Its structural stability makes it highly toxic and resistant to biodegradation. The objective of this study was to assess the congo red biodegradation and detoxification by Aspergillus niger. The effects of pH, initial dye concentration, temperature, and shaking speed on the decolorization rate and enzymes production were studied. The maximum decolorization was correlated with lignin peroxidase and manganese peroxidase production. Above 97% were obtained when 2 g mycelia were incubated at pH 5, in presence of 200 mg/L of dye during 6 days at 28°C and under 120 to 150 rpm shaking speed. The degraded metabolites were characterized by using LC-MS/MS analyses and the biodegradation mechanism was also studied. Congo red bioconversion formed degradation metabolites mainly by peroxidases activities, i.e., the sodium naphthalene sulfonate (m/z = 227) and the cycloheptadienylium (m/z = 91). Phytotoxicity and microtoxicity tests confirmed that degradation metabolites were less toxic than original dye.

Kinetics and mechanisms of the ligand substitution of (η5-C9H7)M(CO)4, where M=Nb or Ta, and a reinvestigation of the kinetics of (η5-C5H5)M(CO)4. Molecular structure of (η5-C5H5)Nb(Co)3[P(C6H5)3]

2000 ◽  
Vol 605 (2) ◽  
pp. 168-173 ◽  
Author(s):  
Thomas E. Bitterwolf ◽  
Dinara Lukmanova ◽  
Skip Gallagher ◽  
Arnold L. Rheingold ◽  
Ilia A. Guzei ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Ligand Substitution ◽  
Kinetics Of

Kinetics of the reactions of the hydroxyl radical with CH3OH and C2H5OH between 235 and 360 K

2003 ◽  
Vol 157 (2-3) ◽  
pp. 237-245 ◽  
Author(s):  
E Jiménez ◽  
M.K Gilles ◽  
A.R Ravishankara
Keyword(s):  
Hydroxyl Radical ◽  
Kinetics Of
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