Abstract
Biogenic Peganum harmala-L Seeds treated with microwave were used to synthesize the novel adsorbent i.e. Peganum harmala activated carbon (PHAC), for the rapid removal and fast adsorption of BG from the solvent phase. Surface characterization techniques such as FE-SEM and FTIR were used for morphological and topological analysis of the synthesized novel adsorbent. Parameters such as contact time, initial dye concentration, temperature, adsorbent dose and initial pH of the solution were well investigated and optimized using batch adsorption method. It is observed that the percentage removal of BG and the uptake of BG increased from 88.86% to 93.25% and from 17.77 to 18.65mg/g with the increase in the temperature from 298 to 333K, respectively, which directly reveals the endothermic nature. The adsorption equilibrium studies clearly revealed a homogeneous adsorption with the maximum adsorption capacity of 35.971mg/g at 298K. The adsorption kinetic process follows pseudo-second-order reaction kinetics.
FESEM image showing the surface textural nature of the synthesized activated carbon PHAC. [Display omitted]
•Peganum harmala-L Seeds (PHAC) was used as adsorbent for removal of BG.•Amount of BG adsorbed increases with increase in solution pH.•Removal percentage of BG increases with increase in adsorbent dosage.•The Qmax for the synthesized adsorbent i.e. PHAC is 35.971mg/g•Negative value of ∆G suggests the spontaneous nature of the adsorption process.