Basic Blue 26 (BB26) is a synthetic dye commonly used in various industries for coloring purposes. Its widespread application necessitates a thorough understanding of its properties and interactions, especially when considering environmental implications and removal techniques. Recent studies have focused on the electrochemical behavior of BB26, its adsorption characteristics, and the development of novel adsorbents for its removal from aqueous solutions.
The electrochemical reduction of BB26 has been explored using thin-layer spectroelectrochemical techniques at SnO2 film optically transparent electrodes. The findings revealed nearly reversible redox peaks on the cyclic voltammogram, indicating the presence of cis-trans-tautomerism and a color change effect. In the presence of oxygen, a charge transfer complex formation between BB26 and oxygen molecules was suggested, leading to new peaks on the cyclic voltammogram and spectrum1.
Activated carbons derived from açaí stones and Brazil nut shells have been investigated for their ability to remove BB26 from aqueous solutions. Characterization of these activated carbons included XRD, FT-IR, and N2 adsorption analyses. The adsorption processes were found to follow pseudo-second-order kinetics, with film diffusion being the primary control mechanism. The Langmuir isotherm model best represented the equilibrium data, indicating that the adsorption was favorable, exothermic, and spontaneous. These findings demonstrate the potential of using agricultural waste products as effective adsorbents for dye removal2.
A study on the use of carbon nitride (CN) and graphene oxide (GO) nanocomposites showcased their high performance in BB26 dye removal. The 50/50 CN/GO nanocomposite, in particular, exhibited superior adsorption capabilities. The adsorption process was optimized to achieve a fast equilibrium time and was influenced by pH variations. At an acidic pH, the removal efficiency was significantly enhanced due to electrostatic interactions. The adsorption mechanism was identified as physisorption, involving weak electrostatic and π-π interactions. Notably, the CN/GO nanocomposite demonstrated a remarkable ability to be recycled and reused for multiple cycles without a significant loss in efficiency, highlighting its potential as a sustainable filtering material for basic dyes3.
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