Dendrimer Modified Magnetic Nanoparticles as Adsorbents for Removal of Dyes

Abstract

The recycling of dendrimers using an ultrafiltration membrane during wastewater treatment is extremely inconvenient. With the combination of magnetic nanoparticles (MNP) with dendrimers, the problem of the recovery of tiny particulate matter from an aqueous solution can be overcome using its magnetism. In this study, the coprecipitation method was adopted to prepare MNP, and then MNP-G(n) (n, generations of dendrimers) was prepared with the formation of the dendrimers on the surface of the MNP. The adsorption of reactive black 5 (RBk5) from an aqueous solution using MNP-G(n) was studied. It was shown that the adsorption data of the composite could be fitted using the Langmuir equation with a maximum adsorption capacity of 70.423 mg g(-1) in the aqueous solution of RBk5 at 25 degrees C. The effects of the initial RBk5 concentration, pH and dendrimer generation were studied and the optimized experimental conditions were obtained. The adsorption capacity increased as the generation of MNP-G(n) increased, and decreased with the rise of the solution pH value. The adsorption of RBk5 with the prepared MNP-G(n) composite was very efficient, and the adsorbent could be recycled using magnetic separation.

Carboxymethyl chitosan-modified magnetic-cored dendrimer as an amphoteric adsorbent

“…PAMAM dendrimer-conjugated magnetic nanoparticles were used in an experiment to sorb Zn(Ⅱ) and an organic dye, RBk5, from water [11,12].…”

Preparation of Polyamidoamine Dendrimer Modified Magnetic Nanoparticles and Its Application for Reliable Measurement of Sudan Red Contaminants in Natural Waters at Parts-Per-Billion Levels

“…XRD patterns were shown in Figure 2H. Six evident characteristic peaks at about 2θ 30.1, 35.1, 44.0, 53.9, 57.6,and 62.8 were due to crystal indexes of ( 220), ( 311), ( 400), ( 422), (511), and (440) of Fe 3 O 4 , which confirmed the cubic spinel phase of naked MNPs (Zhou et al, 2013). Moreover, Gn-MNPs and MNPs had analogical feature diffraction peaks, which proved that the progress of dendrimer modification did not alter the crystal phase of MNPs and MNPs were steady with magnetic property.…”

Peptide–nanoparticle conjugates: a next generation of diagnostic and therapeutic platforms?

“…Responding to external magnetic stimuli, MNPs can be selectively accumulated at a target site in biological systems and release guest molecules in a dosage-controlled fashion [31, 32]. Several in vitro studies have shown that MNPs, displaying multiple binding ligands, effectively discriminate target biomaterials from a mixture solution [33]. Furthermore, upon exposure to the magnetic field, the arrangement of MNPs on a surface can be controlled in various ways, resulting in the use of the MNPs for the development of novel cell culture scaffold [34].…”