Synthesis of α-cellulose/magnetite/polypyrrole composite for the removal of reactive black 5 dye from aqueous solutions

2019 ◽  
Vol 155 ◽  
pp. 350-363 ◽  
Author(s):  
Paola E. Díaz-Flores ◽  
Camerina J. Guzmán-Álvarez ◽  
Víctor M. Ovando-Medina ◽  
Hugo Martínez-Gutiérrez ◽  
Omar González-Ortega
Keyword(s):  
Aqueous Solutions ◽  
Reactive Black 5 ◽  
Polypyrrole Composite

scholarly journals Adsorption of Reactive Black 5 on Synthesized Titanium Dioxide Nanoparticles: Equilibrium Isotherm and Kinetic Studies

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Majeed A. Shaheed ◽  
Falah H. Hussein
Keyword(s):  
Titanium Dioxide ◽  
Aqueous Solutions ◽  
Titanium Dioxide Nanoparticles ◽  
Kinetic Studies ◽  
Second Order ◽  
Reactive Black 5 ◽  
Adequate Model ◽  
Factors Affecting ◽  
Freundlich Isotherms ◽  
Pseudo Second Order

The synthesized titanium dioxide nanoparticles (TiO2-NPs) were used as adsorbent to remove reactive black 5 (RB 5) in aqueous solution. Various factors affecting adsorption of RB 5 aqueous solutions such as pH, initial concentration, contact time, dose of nanoparticles, and temperature were analyzed at fixed solid/solution ratio. Langmuir and Freundlich isotherms were used as model adsorption equilibrium data. Langmuir isotherm was found to be the most adequate model. The pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were used to describe the adsorption kinetics. The experimental data was fitted to pseudo-second-order kinetics. The thermodynamic parameters such as Gibbs-free energy, enthalpy, and entropy changes were determined. These parameters indicated the endothermic and spontaneity nature of the adsorption. The results demonstrated the fact that the TiO2-NPs are promising adsorbent for the removal of RB 5 from aqueous solutions.

Use of hen feathers to remove Reactive Black 5 and Basic Red 46 from aqueous solutions

2021 ◽  
Vol 232 ◽  
pp. 129-139
Author(s):  
Tomasz Józwiak ◽  
Urszula Filipkowska ◽  
Patryk Marciniak
Keyword(s):  
Aqueous Solutions ◽  
Reactive Black 5 ◽  
Hen Feathers ◽  
Basic Red 46

Comparison of chitosan with different physical forms to remove Reactive Black 5 from aqueous solutions

2016 ◽  
Vol 4 (2) ◽  
pp. 2259-2267 ◽  
Author(s):  
Jaqueline M. Moura ◽  
Dara D.R. Gründmann ◽  
Tito R.S. Cadaval ◽  
Guilherme L. Dotto ◽  
Luiz A.A. Pinto
Keyword(s):  
Aqueous Solutions ◽  
Reactive Black 5

scholarly journals Adsorption of Reactive Black 5 Dye from Aqueous Solutions by Carbon Nanotubes and its Electrochemical Regeneration Process

Health Scope ◽  
2020 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Nezamaddin Mengelizadeh ◽  
Hamidreza Pourzamani
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Electrochemical Process ◽  
Gas Chromatography Mass Spectrometry ◽  
Reactive Black 5 ◽  
Electrochemical Regeneration ◽  
Adsorbent Regeneration ◽  
Walled Carbon Nanotubes ◽  
Taguchi Orthogonal Design

: Removal of Reactive Black 5 (RB5) dye from aqueous solutions was investigated by adsorption onto Multi-walled Carbon Nanotubes (MWCNTs) and Single-walled Carbon Nanotubes (SWCNTs). A Taguchi orthogonal design including pH, initial RB5 concentration, contact time, and CNTs dose, was used in 16 experiments. The results showed that all four factors were statistically significant, and the optimum conditions for both adsorbents were as follows: pH of 3, adsorbent dose of 1000 mg/L, RB5 concentrations of 25 mg/L, and contact time of 60 min. An equilibrium study by Isotherm Fitting Tool (ISOFIT) software showed that Langmuir isotherm provided the best fit for RB5 adsorption by CNTs. The maximum predicted adsorption capacities for the dye were obtained as 231.84 and 829.20 mg/g by MWCNTs and SWCNTs, respectively. The results also indicated that the adsorption capacity of SWCNTs was about 1.21 folds higher than that of MWCNTs. Studies of electrochemical regeneration were conducted, and the results demonstrated that RB5-loaded MWCNTs and SWCNTs could be regenerated (86.5% and 77.3%, respectively) using the electrochemical process. Adsorbent regeneration was mostly due to the degradation of the dye by the attack of active species such as chlorate, H2O2, and, •OH, which were generated by the electrochemical oxidation process with Ti/RuO2-IrO2-TiO2 anodes. The results of Gas Chromatography-Mass Spectrometry (GC-MS) analysis showed that acetic acid, 3-chlorobenzenesulfonamide, and 1,2-benzenedicarboxylic acid were produced after adsorbent regeneration by the electrochemical process in the solution of regeneration. The adsorption and regeneration cycles showed that the electrochemical process with Ti/RuO2-IrO2-TiO2 and graphite is a good alternative method for the regeneration of CNTs and simultaneous degradation of the dye.

scholarly journals Removal of Reactive Black 5 dye from Aqueous Solutions by Adsorption onto Activated Carbon of Grape Seed

2017 ◽  
Vol 5 (4) ◽  
pp. 48-61 ◽  
Author(s):  
Mojtaba Afsharnia ◽  
Hamed Biglari ◽  
Allahbakhsh Javid ◽  
Fahimeh Zabihi ◽  
◽  
...  
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Grape Seed ◽  
Reactive Black 5
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