Influence of redox mediators and salinity level on the (bio)transformation of Direct Blue 71: kinetics aspects

2016 ◽  
Vol 183 ◽  
pp. 84-89 ◽  
Author(s):  
Luis H. Alvarez ◽  
Edna R. Meza-Escalante ◽  
Pablo Gortáres-Moroyoqui ◽  
Luz Morales ◽  
Krystal Rosas ◽  
...  
Keyword(s):  
Salinity Level ◽  
Redox Mediators ◽  
Direct Blue ◽  
Direct Blue 71

Decolorization and biogas production by an anaerobic consortium: effect of different azo dyes and quinoid redox mediators

2015 ◽  
Vol 72 (5) ◽  
pp. 794-801 ◽  
Author(s):  
L. H. Alvarez ◽  
R. Valdez-Espinoza ◽  
R. B. García-Reyes ◽  
D. Olivo-Alanis ◽  
M. T. Garza-González ◽  
...  
Keyword(s):  
Azo Dyes ◽  
Biogas Production ◽  
Inhibitory Effect ◽  
Redox Mediators ◽  
Direct Blue ◽  
Anaerobic Consortium ◽  
The Impact ◽  
Direct Blue 71

The inhibitory effect of azo dyes and quinoid compounds on an anaerobic consortium was evaluated during a decolorization process and biogas production. In addition, the impact of quinoid compounds such as lawsone (LAW) and anthraquinone-2,6-disulfonate (AQDS) on the rate of decolorization of Direct Blue 71 (DB71) was assessed. The anaerobic consortium was not completely inhibited under all tested dye concentrations (0.1–2 mmol l−1), evidenced by an active decolorization process and biogas production. The presence of quinoid compounds at different concentrations (4, 8, and 12 mmol l−1) also inhibited biogas production compared to the control incubated without the quinoid compounds. In summary, the anaerobic consortium was affected to a greater extent by increasing the quantity of azo dyes or quinoid compounds. Nevertheless, at a lower concentration (1 mmol l−1) of quinoid compounds, the anaerobic consortium effectively decolorized 2 mmol l−1 of DB71, increasing up to 5.2- and 20.4-fold the rate of decolorization with AQDS and LAW, respectively, compared to the control lacking quinoid compounds.

scholarly journals Treatment of wastewaters containing acid, reactive and direct dyes using aminosilane functionalized silica

2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Monika Wawrzkiewicz ◽  
Zbigniew Hubicki ◽  
Magdalena Nowacka ◽  
Łukasz Klapiszewski
Keyword(s):  
Langmuir Isotherm ◽  
Aqueous Media ◽  
Reactive Black 5 ◽  
Functionalized Silica ◽  
Acid Orange 7 ◽  
Direct Dyes ◽  
Modified Silica ◽  
Direct Blue ◽  
Langmuir Isotherm Model ◽  
Direct Blue 71

AbstractAminosilane modified silica was prepared and investigated for the adsorption of textile dyes such as C.I. Acid Orange 7 (AO7), C.I. Reactive Black 5 (RB5) and C.I. Direct Blue 71 (DB71) from aqueous media and wastewaters. The values of the sorption capacities obtained from the Langmuir isotherm model were: 5.3 mg g

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

scholarly journals Optimization of Direct Blue 71 Sorption by Organic Rich-Compost Following Multilevel Multifactor Experimental Design

2021 ◽  
pp. 103468
Author(s):  
Khaled Al-Zawahreh ◽  
Yahya Al-Degs ◽  
María Teresa Barral ◽  
Remigio Paradelo
Keyword(s):  
Experimental Design ◽  
Direct Blue ◽  
Direct Blue 71

Detection of Proteins on Blots Using Direct Blue 71

2003 ◽  
pp. 387-392 ◽  
Author(s):  
Hee-Youn Hong ◽  
Gyurng-Soo Yoo ◽  
Jung-Kap Choi
Keyword(s):  
Direct Blue ◽  
Direct Blue 71

Visible Light Induced Heterogeneous Photo-Fenton Oxidation of Direct blue 71 using Mesoporous Fe/KIT-6

2017 ◽  
Vol 10 (5) ◽  
pp. 1455 ◽  
Author(s):  
A.R. Sasieekhumar ◽  
T. Somanathan ◽  
A. Abilarasu ◽  
M. Shanmugam
Keyword(s):  
Visible Light ◽  
Fenton Oxidation ◽  
Direct Blue ◽  
Direct Blue 71

scholarly journals Study of a fixed-bed column in the adsorption of an azo dye from an aqueous medium using a chitosan–glutaraldehyde biosorbent

2017 ◽  
Vol 36 (1-2) ◽  
pp. 215-232 ◽  
Author(s):  
Jaime López-Cervantes ◽  
Dalia I Sánchez-Machado ◽  
Reyna G Sánchez-Duarte ◽  
Ma A Correa-Murrieta
Keyword(s):  
Flow Rate ◽  
Service Time ◽  
Fixed Bed ◽  
Textile Dye ◽  
Time Model ◽  
Fixed Bed Column ◽  
Bed Height ◽  
Direct Blue ◽  
Direct Blue 71 ◽  
Bed Depth Service Time

A continuous adsorption study in a fixed-bed column was carried out using a chitosan–glutaraldehyde biosorbent for the removal of the textile dye Direct Blue 71 from an aqueous solution. The biosorbent was prepared from shrimp shells and characterized by scanning electron microscopy, X-ray diffraction, and nuclear magnetic resonance spectroscopy. The effects of chitosan–glutaraldehyde bed height (3–12 cm), inlet Direct Blue 71 concentration (15–50 mg l−1), and feed flow rate (1–3 ml min−1) on the column performance were analyzed. The highest bed capacity of 343.59 mg Direct Blue 71 per gram of chitosan–glutaraldehyde adsorbent was obtained using 1 ml min−1 flow rate, 50 mg l−1 inlet Direct Blue 71 concentration, and 3 cm bed height. The breakthrough curve was analyzed using the Adams–Bohart, Thomas, and bed depth service time mathematical models. The behaviors of the breakthrough curves were defined by the Thomas model at different conditions. The bed depth service time model showed good agreement with the experimental data, and the high values of correlation coefficients (R2 ≥ 0.9646) obtained indicate the validity of the bed depth service time model for the present column system.

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