Investigation of α‐iron oxide‐coated polymeric nanocomposites capacity for efficient heavy metal removal from aqueous solution

Abstract

In the present study, PS@a-Fe 2 O 3 nanocomposites were prepared by chemical microemulsion polymerization approach and the ability of magnetic beads to remove Cu(II) ions from aqueous solutions in a batch media was investigated. Various physico-chemical parameters such as pH, initial metal ion concentration, temperature, and equilibrium contact time were also studied. Adsorption mechanism of Cu 21 ions onto magnetic polymeric adsorbents has been investigated using Langmuir, Freundlich, Sips and Redlich-Petersen isotherms. The results demonstrated that the PS@a-Fe 2 O 3 nanocomposite is an effective adsorbent for Cu 21 ions removal. The Sips adsorption isotherm model (R 2 > 0.99) was more in consistence with the adsorption isotherm data of Cu(II) ions compared to other models and the maximum adsorbed amount of copper was 34.25 mg/g. The adsorption kinetics well fitted to a pseudo second-order kinetic model. The thermodynamic parameters (DH8, DS8, and DG8) were calculated from the temperature dependent sorption isotherms, and the results suggested that copper adsorption was a spontaneous and exothermic process.

Adsorption studies of toxic organic pesticides from aqueous medium by sodium alginate‐cl‐poly (allyl amine‐co‐acrylic acid)/copper oxide nanocomposite hydrogel: Isotherms, kinetics, and thermodynamics

“…Among the above reported methods, the adsorption method becomes more significant for pesticide removal from the pesticides' contaminated water 24,25 with greater efficiency. Numerous natural adsorbents, including wheat straw, 26 sal wood charcoal, 27 carbon slurry, 28 riverbed sand, 29 and only a small number of synthetic materials, including molecularly imprinted mesoporous silica particles, 30,31 methyl trimethoxy silane-tetraethoxy silane, 32 C18, 33 polydimethylsiloxane-2-hydroxymethyl-18-Crown-6, 34 bifunctional Au-Fe 3 O 4 nanoparticles, 35 multi-wall carbon nanotubes, 36,37 graphene, 38 and calixarene, 24 are used to adsorb pesticides from aqueous environments. 39 However, their employment in adsorption is constrained by their ineffective adsorption, expensive synthetic method, challenging regeneration, and time-consuming material separation.…”

Synthesis of a novel Zn‐MOF/PVA nanofibrous composite as bioorganic material: Design, systematic study and an efficient arsenic removal

“…[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] In recent years, heavy metal pollution has increased as a result of the evolution of the chemical industry and the introduction of toxic compounds into water. [24][25][26][27][28][29] These elements, which have low biocompatibility and biodegradability, contain many compounds, but studies have shown that the contamination of arsenic has attracted much attention due to its effects on organisms and has become a global concern. [30] Arsenic causes many environmental and health problems and plays a key role in the development of cancer in the skin, lungs, bladder, and kidneys.…”

“…[ 8‐23 ] In recent years, heavy metal pollution has increased as a result of the evolution of the chemical industry and the introduction of toxic compounds into water. [ 24‐29 ] These elements, which have low biocompatibility and biodegradability, contain many compounds, but studies have shown that the contamination of arsenic has attracted much attention due to its effects on organisms and has become a global concern. [ 30 ]…”