Abstract
The hollow tube-like banana fibre carbon (BFC) materials was utilized for adsorptive removal of toxic cationic dyes such as methyl violet (MV) and crystal violet (CV), and anionic dyes such as methyl orange (MO) and alizarin red S (ARS) from water. Scanning electronic microscopy (SEM) images revealed the hollow ends of the carbons were prominent. The chemical composition of BFC indicated that the carboxylate groups majorly contributed to the adsorption capacity. Langmuir isotherm and pseudo-first-order kinetics were effectively fitted to adsorption results. The maximum adsorption capacities were equal to 85.65, 78.95, 65.78 and 65.07 mg/g for MV, MO, CV and ARS, respectively. The biocarbon of banana fibre could be a good choice for water treatment due to its attractive adsorption performance.