Process Optimization and Adsorptive Mechanism for Reactive Blue 19 Dye by Magnetic Crosslinked Chitosan/MgO/Fe3O4 Biocomposite

Abstract

A new biocomposite magnetic crosslinked glutaraldehyde-chitosan/MgO/Fe3O4 (CTS-GL/MgO/Fe3O4) adsorbent was prepared and applied for the removal of reactive blue 19 (RB 19) synthetic textile dye. The prepared CTS-GL/MgO/Fe3O4 was subjected to the several instrumental characterizations such as XRD, FTIR, SEM-EDX, pH-potentiometric titration, and pHpzc analyses. The influence of the input adsorption parameters such as A: CTS-GL/MgO/Fe3O4 dosage, B: initial solution pH, C: process temperature, and D: contact time on RB 19 removal efficiency was statistically optimized using Box-Behnken design (BBD). The analysis of variance (ANOVA) indicates the presence of five significant statistical interactions between input adsorption parameters i.e. (AB, AC, AD, BC, and BD). The adsorption kinetic and equilibrium study reveals a good to the pseudo-second-order model, and multilayer adsorption as proven by Freundlich isotherm model, respectively. The maximum adsorption capacity of CTS-GL/MgO/Fe3O4 towards RB19 was found to be 193.2 mg/g at 45 ºC. This work highlights the development of feasible and recoverable magnetic biocompsite adsorbent with desirable adsorption capacity towards textile dyes with good separation ability by using an external magnetic field.

A Cellulose‐Based Adsorbent using Box‐Behnken Design for the Adsorption of Reactive Blue 19 Dye from Simulated Wastewater

“…Using statistically planned trials, experiments were performed for various combinations of the physical characteristics to examine the combined impact of all five major factors, namely, adsorbent dosage (g), initial dye concentration (mg/L), operational time (min), pH of the solution, and temperature (°C) [43] . All 43 runs with its % RB19 dye removal were mentioned in Table 1.…”

“…This is because of the reason that the number of active sites will increase with the increase in adsorbent dosage. Moreover, at constant initial dye concentration, increasing adsorbent dosage will provide more adsorption sites which ultimately result in the increment of dye adsorption [43,48] . The curved portion indicates that there is a good interaction between adsorbent dosage and % dye removal.…”

Steric and Energetic Studies on the Synergetic Enhancement Effect of Integrated Polyaniline on the Adsorption Properties of Toxic Basic and Acidic Dyes by Polyaniline/Zeolite-A Composite

“…Later, heterogeneous and multifunctional structures with various organic/inorganic reactive chemical groups based on natural precursors were assessed as improved potential adsorbents during the decontamination of organic molecules [34,35]. Currently, synthesized zeolite/biopolymers that establish excellent adsorption capacity, recycling potential, biodegradable properties, ion exchange capacity, and environmental advantages are presented as prospective multifunctional and low-cost adsorbents [36,37]. The synthesized forms of zeolite have been described as superior materials with a wide range of physicochemical advantages and may be combined effectively with various forms of constituents to develop a hybrid structure with improved physical and chemical characteristics [38][39][40].…”

“…The synthesized forms of zeolite have been described as superior materials with a wide range of physicochemical advantages and may be combined effectively with various forms of constituents to develop a hybrid structure with improved physical and chemical characteristics [38][39][40]. Synthetic zeolite-A has noteworthy structural flexibility, chemically stable properties, surface area, remarkable non-toxicity, adsorption efficiency, and excellent biocompatibility [36,41]. The key drawback of these types of materials is their significant hydrophilicity, which adversely affects their affinity and reactivity towards the organic compounds that exist in water [42].…”

The evolution of the global COVID-19 epidemic in Morocco and understanding the different therapeutic approaches of chitosan in the control of the pandemic

“…Although much attention has not been covered concerning natural resources as potential therapeutic molecules, some reports show that a natural and biocompatible polymer, mainly derived from the exoskeleton of crustaceans, such as chitosan, can be used to combat COVID-19 [ 8 ]. Chitosan has attracted many attention in several fields, especially in chemistry and environmental science, because of its unique features and properties that allow the production of new formulations, especially biocomposites [ 9 – 17 ], nanoparticles [ 18 ], nanocomposites [ 19 – 21 ] and others [ 22 , 23 ]. Moreover, the bibliometric study done by Chiari et al .…”