Adsorption Isotherm Performance on Direct red 28 dye by Novel Biomassbased Green Composite

Abstract

The presence of diverse organic compounds, such as dyes, in wastewater may pose potential environmental hazards. Therefore, it is imperative to remove these harmful substances from the various water resources. In this work, superparamagnetic nanoparticles/pomegranate waste biomass derived green magnetic composite (GMC) was fabricated and characterized using SEM, BET, and Vibrating Sample Magnetometer (VSM). The surface area, total pore volume and average pore diameter were evaluated using BET method. The GMC had a specific surface area of 244.43 m2 /g and saturation magnetization value of 1.53 emu/g. The GMC sorbent was utilized for the removal of direct red 28 (DR28) dye from aqueous solution. Adsorption isotherm studies were also conducted to define the adsorption type. Langmuir and Freundlich model isotherms were employed to study the adsorption phenomena. Isotherms studies further show that the DR28 dye sorption follows the Langmuir model. Monolayer adsorption capacity of the sorbent for DR28 dye was 86.96 mg/g at 328 K. In summary, it can be concluded that the developed composite material in this study could be a promising alternative to the traditional DR28 dye removal methods.