Magnetized inulin by Fe3O4 as a bio-nano adsorbent for treating water contaminated with methyl orange and crystal violet dyes

Abstract

Current work focuses on fabricating a new bio-nano adsorbent of Fe3O4@inulin nanocomposite via an in-situ co-precipitation procedure to adsorb methyl orange (MO) and crystal violet (CV) dyes from aqueous solutions. Different physical characterization analyses verified the successful fabrication of the magnetic nanocomposite. The adsorbent performance in dye removal was evaluated by varying initial dye concentration, adsorbent dosage, pH and temperature in 5110 mg/L, 0.10.8 g/L, 111 and 283–338 K, respectively. Due to the pH of zero point of charge and intrinsic properties of dyes, the optimum pHs were 5 and 7 for MO and CV adsorption, respectively. The correlation of coefficient (R2) and reduced chi-squared value were the criteria in order to select the best isotherm and kinetics models. The Langmuir model illustrated a better fit for the adsorption data for both dyes, demonstrating the maximum adsorption capacity of 276.26 and 223.57 mg/g at 338 K for MO and CV, respectively. As well, the pseudo-second-order model showed a better fitness for kinetics data compared to the pseudo-first-order and Elovich models. The thermodynamic parameters exhibited that the dye adsorption process is endothermic and spontaneous, which supported the enhanced adsorption rate by increasing temperature. Moreover, the nanocomposite presented outstanding capacity and stability after 6 successive cycles by retaining more than 87% of its initial dye removal efficiency. Overall, the magnetized inulin with Fe3O4 could be a competent adsorbent for eliminating anionic and cationic dyes from water.

Monolayer Adsorption of Ciprofloxacin on Magnetic Inulin/Mg–Zn–Al Layered Double Hydroxide: Advanced Interpretation of the Adsorption Process

“…FTIR spectrum of MILDH displays two bands peaking at 2922 and 2848 cm –1 which characterize the asymmetric and symmetric vibration of C–H. Furthermore, the peaks appearing at 1118 and 1050 cm –1 are associated to stretching vibrations of C–O–C and C–O bonds related to inulin . A sharp peak appearing at 570 cm –1 may be assigned to the Fe–O bond.…”

Synthesis of New Composite Adsorbents for Removing Heavy Metals and Dyes from Aqueous Solution

“…The solution pH is generally affecting the negatively and positively charged composite surface molecules. Their charge is altered to be more positively or negatively charged through the process of proton gain or loss [45]. Degree of the ionization, and the dissociation of the functional groups are all influenced by the pH of the solution [44].…”

Removal of anionic dyes utilizing Box-Behnken design and cloud point extraction coupled with derivative spectrophotometry

“…The dyes mentioned have the potential to cause damage to several organs and bodily systems, including the lungs, liver, Vasco-circulatory system, reproductive system, and immune system. Additionally, they may trigger allergic responses, eczema, and skin dermatosis [4][5][6] .…”