Synthesis and characterization of magnetic beads containing aminated fibrous surfaces for removal of Reactive Green 19 dye: kinetics and thermodynamic parameters

Abstract

BACKGROUND: Poly(HEMA-co-MMA) beads were prepared from 2-hydroxyethyl-methacrylate (HEMA) and methylmethacrylate (MMA) in the presence of FeCl 3 . Thermal co-precipitation of Fe(III) ions containing beads with Fe(II) ions was carried out under alkaline conditions. The magnetic beads were grafted with poly(glycidylmethacrylate; p(GMA)), and the epoxy groups of the grafted p(GMA) brushes were converted into amino groups by reaction with ammonia.

Simultaneous adsorption of lead and aniline onto magnetically recoverable carbon: optimization, modeling and mechanism

“…Over the years, magnetic nanoparticles have been employed by researchers in the field of adsorption/biosorption for separation of pollutants from polluted‐water . The utilization of these materials makes the separation of both the adsorbent and the adsorbate much easier from water.…”

“…8,10,11 Over the years, magnetic nanoparticles have been employed by researchers in the field of adsorption/biosorption for separation of pollutants from polluted-water. 7,8,12 The utilization of these materials makes the separation of both the adsorbent and the adsorbate much easier from water. Hence, the water does not need to be filtered or centrifuged after the adsorption process, which is considered a critical advantage.…”

Synthesis of semi interpenetrating network hydrogel [(GrA‐Psy)‐cl‐Poly (AA)] and its application for efficient removal of malachite green from aqueous solution

“…The observed deviation may be attributed to the weakening of the attractive forces between adsorbent and adsorbate molecules or the possible alteration of active sites by increasing temperature. Moreover, the value of Langmuir constant (b) was observed to decrease with increase in temperature, which indicated that the affinity between adsorbent and adsorbate decreased with increase in temperature [9,43].…”

“…Various treatment processes such as ozonation , coagulation , ultrafiltration , oxidation , photocatalytic degradation , and adsorption are applied for dye removal from wastewater, but adsorption is considered as the most efficient method for the removal of dyes from wastewater . In the recent years, extensive research has been undertaken to develop alternative and cost‐effective adsorbents .…”

Removal of reactive dyes from wastewater by acrylate polymer beads bearing amino groups: isotherm and kinetic studies

“…To prevent dye discharge and contamination, the removal of dyes from aqueous environments by various methods such as advance oxidation , biodegradation , membrane filtration and adsorption has been reported. Many adsorbents have been tested for their potential to lower dye concentrations from aqueous solutions, such as acrylic acid containing crosslinked vinyl benzylchloride beads , carbon, modified clay , chitosan, poly(propylene imine) dendrimer, magnetic nanocomposite hydrogels and others . The adsorption process is generally recommended for the removal of dyes because of its easy handling, high efficiency, regenerability, availability of different adsorbents and cost effectiveness.…”