Dynamic Adsorption of Bisphenol A from Simulated Wastewater Using Arachis Hypogaea Husk-Based Composite

A biosorption technique has been employed to investigate the removal of bisphenol A from simulated wastewater using Arachis hypogaea husk (common name peanut husk; PH) and its chemically synthesized composite with polypyrrole (PPY-PH). SEM images confirmed the heterogeneous, porous, and fibrous structures favorable for sorption, while functional group modification was tracked via FT-IR. Native biomass and prepared composite were employed to optimize the pH in batch mode, while in continuous mode, parameters like flow rate, bed height, and bisphenol A concentration were optimized, and outcomes were illustrated in breakthrough curves. The maximum biosorption capacity with PH and PPY-PH is 5.17 and 6.25 mg/g, respectively, at a bed height of 4 cm and a flow rate of 1.8 mL/min. The results exhibited that the maximum biosorption capacity for PH and PPY-PH was observed at a bed height of 4 cm, a flow rate of 1.8 mL/min, and bisphenol A concentration of 45 ppm. Biosorption feasibility was also studied using mathematical models like the Thomas and Bed Depth Service Time models on experimental data. The current study revealed that peanut husk and its composite have promising biosorption potential and could be utilized in upscale wastewater treatment.