Synthesis of KOH-activated carbon aerogel for the efficient removal of crystal violet from aqueous solutions

Abstract

In this study, a low-cost jackfruit based KOH-activated carbon aerogel (AJCA) is prepared from facile hydrothermal treatment synthesized core of jackfruit with different heating rate. AJCA is sythesisized to absorb crystal violet (CV) dye from aqueous solutions and effectively treat other dyes. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) allow for targeted analysis of sample surfaces which has many grooves of varying depth, and many layers of scales stack on top of each other. The specific surface area, which is examined by The Brunauer-Emmett-Teller (BET) method, reaches 592.65 m²/g. The most suitable heating rate is 3 degrees per minute (AJCA-3). The maximum adsorption capacity is 386,66 mg/g and the absorption performance reaches 96,5% at a concentration of 300 ppm, which indicates that AJCA-3 is very efficient and competitive with several adsorbents. The pseudo-second-order model satisfactorily describes the adsorption kinetics, and the Langmuir model was suitable to represent the adsorption equilibrium. These experiments show that AJCA has excellent potential on treating real coloured eflluents.