Decontamination of arsenic(V)-contained liquid phase utilizing Fe3O4/bone char nanocomposite encapsulated in chitosan biopolymer

Abstract

The application of a novel nanocomposite synthesized through the combination of FeO nanoparticles and bone char particles for the adsorption of As(V) ions in the aquatic medium was investigated. As-prepared nanocomposite was immobilized by using chitosan biopolymer. The characterization of the nanocomposite was performed via SEM, XRD, FT-IR, and BET together with the determination of zero-point charge of the adsorbent surface. As results, the obtained experimental data were fitted well with pseudo-first-order kinetic model (R = 0.997) and Langmuir isotherm model (R = 0.990) with the maximum adsorption capacity of about 112 μg/g. Increasing the dosage of nanocomposite and initial solute concentration led to increasing the adsorption capacity of As(V) ions, while decreasing the solution temperature resulted in the enhanced adsorption process. According to the results of thermodynamic study, the adsorption of As(V) ions onto the nanocomposite was spontaneous and exothermic in nature.

Removal of Malathion by Sodium Alginate/Biosilicate/Magnetite Nanocomposite as a Novel Adsorbent: Kinetics, Isotherms, and Thermodynamic Study

“…Among the various adsorbents, nanostructured adsorbents have attracted the attention of researchers as a result of their vast surface area and their very active surface sites rather than large adsorbents (20,21). One of the well-known nanostructures is magnetite nanoparticles that have been used owing to its surface area, and its ability in combination with other adsorbents in the synthesis process of nanoparticles (22,23). In addition, the main advantage of magnetite nanoparticles is to be easily separated from aqueous solutions by an external magnetic field.…”