Preparation of magnetic inulin nanocomposite and its application in the removal of methylene blue and heavy metals from aqueous solution

Abstract

The environmental pollution by chemical pollutants has expanded. Today, the use of biopolymer composites as adsorbent has attracted a lot of attention due to biopolymers presence in plant tissue also their hybridization with magnetic nanoparticles will increase the removal of contaminants from aqueous solutions. Inulin biopolymer from Jerusalem artichoke plant by using ultrasonic wave simply in presence of Eco-Friendly precursors was extracted and the inulin-Fe3O4 nanocomposite for the first time was synthesized then DLS analysis the pH which maximum adsorption occurs, XRD and FTIR obvious peaks, TGA stability of nanocomposites at high temperatures, EDX elements FESEM and TEM morphology identified VSM showed magnetic saturation of 46.1 emu g−1 which can be separate easily from environment BET the specific surface area of nanocomposite was calculated 25.6 m2/g synthesis of inulin-Fe3O4 nanocomposite is very cost-effective and impressive. The effect of parameters, including dosage of adsorbent and pH on the adsorption capacity, studied which 136.4 mg/g at pH of 7 for methylene blue and 152.5, 167.7, 198 mg/g for Co2+, Cu2+, and Hg2+ respectively on 0.01g adsorbent for pH 5.5 obtained. Competitive adsorption of metal ions was also studied, which 93.1% of Hg2+ can adsorb which is more than the other two ions which indicates its effect on these ions. The Langmuir isotherm and pseudo-second-order kinetic provided a better description of the behavior of this system, the adsorption process is endothermic for methylene blue and exothermic for metals also, the reusability of this nanocomposite for repeated cycles, can be seen.