Spectroscopic studies of Direct Blue 1 in solution and on cellulose surfaces: effects of environment on a bis-azo dye

2004 ◽  
Vol 28 (7) ◽  
pp. 815 ◽  
Author(s):  
Laurence C. Abbott ◽  
Stephen N. Batchelor ◽  
Lisinka Jansen ◽  
John Oakes ◽  
John R. Lindsay Smith ◽  
...  
Keyword(s):  
Azo Dye ◽  
Spectroscopic Studies ◽  
Direct Blue

Spectroscopic Studies of the Intermolecular Interactions of a Bis-Azo Dye, Direct Blue 1, on Di- and Trimerization in Aqueous Solution and in Cellulose

2004 ◽  
Vol 108 (36) ◽  
pp. 13726-13735 ◽  
Author(s):  
Laurence C. Abbott ◽  
Stephen N. Batchelor ◽  
John Oakes ◽  
John R. Lindsay Smith ◽  
John N. Moore
Keyword(s):  
Aqueous Solution ◽  
Intermolecular Interactions ◽  
Azo Dye ◽  
Spectroscopic Studies ◽  
Direct Blue

A bipyridinium-based polyhydrazone adsorbent that exhibits ultrahigh adsorption capacity for the anionic azo dye, direct blue 71

2021 ◽  
Vol 409 ◽  
pp. 128195
Author(s):  
Tamer El Malah ◽  
Hany F. Nour ◽  
Emad K. Radwan ◽  
Randa E. Abdel Mageid ◽  
Tawfik A. Khattab ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Azo Dye ◽  
Direct Blue ◽  
Direct Blue 71

Treatment of the azo dye direct blue 2 in a biological aerated filter under anaerobic/aerobic conditions

2010 ◽  
Vol 61 (3) ◽  
pp. 789-796 ◽  
Author(s):  
S. González-Martínez ◽  
S. Piña-Mondragón ◽  
Ó. González-Barceló
Keyword(s):  
Azo Dye ◽  
Municipal Wastewater ◽  
Dye Removal ◽  
Ammonia Nitrogen ◽  
Final Concentration ◽  
Biological Aerated Filter ◽  
Removal Rates ◽  
Aerobic Conditions ◽  
Direct Blue ◽  
Aerated Filter

The main objective of this research was to determine the feasibility to treat the azo dye direct blue 2 together with municipal wastewater in a biological aerated filter (BAF) using lava stones as support of the microorganisms and under combined anaerobic/aerobic conditions. A 3 m high pilot biological aerated filter was fed with municipal wastewater and, after several weeks, the azo dye direct blue 2 was added to the wastewater to reach a final concentration of 50 mg/L (34 mgCOD/L). Under continuous operation, two strategies were tested: Alternating aeration (12 h anaerobic and 12 h aerobic) and combined aeration (the lower part of the filter anaerobic and the upper part aerobic). The results indicate that municipal wastewater acted as a good electron donor resulting in satisfactory COD and dye removal rates. Better dye removal (61%) was obtained with combined aeration than with alternating aeration (45%). After beginning the azo dye addition, the COD removal rates decreased from 87 to 81% for both alternating and combined aeration procedures. The average ammonia nitrogen removal, without the addition of the dye, was 73% and increased to 90% shortly after beginning the dye addition, then it decreased to 81% during the combined aeration period. Excellent nitrification was observed in the upper aerobic part of the filter. For the combined aeration phase, the conditions change from anaerobic to aerobic does not seem to affect the behavior of the COD and TSS curves.

Exposure to the azo dye Direct blue 15 produces toxic effects on microalgae, cladocerans, and zebrafish embryos

Ecotoxicology ◽  
2019 ◽  
Vol 28 (8) ◽  
pp. 890-902 ◽  
Author(s):  
Miriam Hernández-Zamora ◽  
Fernando Martínez-Jerónimo
Keyword(s):  
Azo Dye ◽  
Toxic Effects ◽  
Zebrafish Embryos ◽  
Direct Blue ◽  
Direct Blue 15

Azo dye functionalized graphene nanoplatelets for selective detection of bisphenol A and hydrogen peroxide

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87295-87305 ◽  
Author(s):  
Nael G. Yasri ◽  
Ashok K. Sundramoorthy ◽  
Sundaram Gunasekaran
Keyword(s):  
Hydrogen Peroxide ◽  
Bisphenol A ◽  
Azo Dye ◽  
Saline Solution ◽  
Graphene Nanoplatelets ◽  
Direct Blue ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Phosphate Buffered Saline ◽  
Direct Blue 71

A new electrochemical sensor is developed based on graphene nanoplatelets functionalized with tri-azo dye (direct blue 71) for selective and highly sensitive detection of bisphenol A and hydrogen peroxide in pH 7 phosphate buffered saline solution.

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