Magnetic Chitosan-Glutaraldehyde/Zinc Oxide/Fe3O4 Nanocomposite: Optimization and Adsorptive Mechanism of Remazol Brilliant Blue R Dye Removal

Abstract

A magnetic Schiff's base chitosan-glutaraldehyde/Fe3O4 composite (CHT-GLA/ZnO/Fe3O4) was developed by incorporating zinc oxide (ZnO) nanoparticles into its structure to prepare an efficient adsorbent for the removal of remazol brilliant blue R (RBBR) dye. The CHT-GLA/ZnO/Fe3O4 was characterized by the following methods: CHN, BET, FTIR, XRD, SEM-EDX, pHpzc, and potentiometric titrations. Box-Behnken design based on response surface methodology was used to optimize the effects of the A: ZnO nanoparticles loading (0-50%), B: dose (0.02-0.1 g), C: pH (4-10), D: temperature (30-60 °C), and time E: (10-60 min) on the synthesis of the magnetic adsorbent and the RBBR dye adsorption. The experimental data of kinetics followed the pseudo-second order model, while isotherms showed better fit to Freundlich and Temkin models. The maximum adsorption capacity of the target nanocomposite (CHT-GLA/Fe3O4 containing 25% ZnO or CHT-GLA/ZnO/Fe3O4-25) was reached of 176.6 mg/g at 60 °C. The adsorption mechanism of RBBR onto CHT-GLA/ZnO/Fe3O4 nanocomposite can be attributed to multi-interactions including electrostatic attractions, hydrogen bonding, Yoshida Hbonding, and n-π interactions. This study offers a promising hybrid nanobiomaterial adsorbent in environmental nanotechnology to separate and remove the contaminants such as organic dyes from wastewater.

Synthetization and characterization of SnCaAl2O3 nanocomposite and using as a superior adsorbent for Pb, Zn, and Cd ions in polluted water

“…The sorption properties of the used material can be explained using Eq 1 , where Q eq (mg eq /g) is the static exchange capacity, С 0 is the initial concentration, and С t is the steady-state concentration (mg/L). V is the metal ions volume in solution (L), and m is the sorbent weight (g) [ 33 ].…”

Recent progress, synthesis, and application of chitosan-decorated magnetic nanocomposites in remediation of dye-laden wastewaters

“…This research affirmed the nanocomposite as a viable and efficient adsorbent for the separation of organic dye pollutants from waste water. 138 Table 1 summarizes the leading examples for the removal of anionic dyes.…”

Analyzing the Efficiency of Di-FeNPs in Removal of Methyl Orange Dye using Statistical Approach

“…The vertical axis of the dendrogram signifies the distance of dissimilarity among the clusters while the horizontal axis represents the clusters. In Figure 4, clusters are grouped as A, B, and C. The experimental runs performed B (1,7,34,29,25,11,2,19,28,5,15,18,20,32,43,23,46,37,10,16,27,9,21,40,36,45,35,36,22) are grouped under cluster A, runs performed under cluster B (8,17,33,39,30,38,24,14,4) while the cluster C includes groups (12,31,44,26,41,13,42). The clustering of the data is grouped according to their initial dye concentration.…”

“…RSM reduces the number of experimental runs required to study the significance of parameters distressing the response of interest. Reghioua et al, (8) used RSM based on BBD for the optimization study of Remazol brilliant blue R dye removal using chitosan-glutaraldehyde/Fe 3 O 4 composites incorporated with zinc oxide nanoparticles.…”