Adsorption of Congo red dye in water by orange peel biochar modified with CTAB

Abstract

This study used hexadecyl trimethyl ammonium bromide (CTAB) to organically modify orange peel biochar (OBC) to produce CTAB-modified orange peel biochar (NOBC), the adsorption performance of NOBC on Congo red dye in water and the influencing factors were investigated.

An investigation into the prospective applications of bio-catalyst metal frameworks: a novel catalyst for improved removal of Congo red from aqueous solutions

“…The adsorption isotherm serves as a pivotal tool for characterizing the affinity between the adsorbent and adsorbate surfaces at equilibrium, governing the distribution of the adsorbate within the solution and adsorbent matrix. The Langmuir isotherm, represented by eqn (9), emerges as the most fitting model for elucidating monolayer adsorption dynamics, assuming energetically identical adsorption sites on a homogeneous surface and the absence of interspecies interactions. 40 This model is particularly adept at deriving the maximum adsorption capacity from experimental data, as expressed by the equation:…”

“…7 Notably, Congo red (CR), an anionic dye insoluble in acids and bases, poses significant challenges due to its persistence in nature, inhibiting plant and animal growth and impacting the human digestion, blood, and cardiovascular systems. 8,9 Given these environmental challenges, the treatment of industrial wastewater containing such dyes before release into the environment becomes imperative. 10 Various physical and chemical processes, including flocculation, membrane filtration, coagulation, precipitation, ozonation, electrochemical techniques, and fungal decolonization, have been extensively explored for removing dyes from aquatic bodies.…”

“…7 Notably, Congo red (CR), an anionic dye insoluble in acids and bases, poses significant challenges due to its persistence in nature, inhibiting plant and animal growth and impacting the human digestion, blood, and cardiovascular systems. 8,9…”

Methyl Orange Adsorption on Biochar Obtained from Prosopis juliflora Waste: Thermodynamic and Kinetic Study

“…Dye Adsorption Capacity (mg g −1 ) Chitosan [33] Indigo carmine 118 Goethite [34] Methylene orange 55 Zeolite [35] Crystal violet 1217 Carbonized pine needles [36] Malachite green 97 Coir pith [37] Crystal violet 66 MgO-TiO2 zeolite [38] Methylene orange 95 Coir pith [37] Crystal violet 66 Fe-Mn oxide nanoparticles [39] Methylene blue 72 leaves of populous tree [40] Methylene orange 90 Orange peel biochar [41] Congo red 155…”

Comparison of Oil-Seed Shell Biomass-Based Biochar for the Removal of Anionic Dyes—Characterization and Adsorption Efficiency Studies

“…However, these lignocellulosic biomasses can be pyrolyzed to produce higher-value products like biochar for efficient removal of organic pollutants such as textile dyes from wastewater. The removal of textile dyes, including Methylene Blue [ 17 , 18 ], Remazol Brilliant Blue (RBB) [ 19 , 20 ], and Congo Red [ 21 , 22 ] (CR) from wastewater are efficiently achieved through biochar. Biochar, derived from organic waste, acts as an effective adsorbent, capturing and immobilizing dye molecules in its porous structure.…”