Synthesis and characterization of novel magnetic Fe3O4/polyurethane foam composite applied to the carrier of immobilized microorganisms for wastewater treatment

Abstract

The objective of this work was to prepare novel magnetic Fe 3 O 4 /polyurethane foam (Fe 3 O 4 /PUF) composites applied to the carriers of immobilized microorganisms for toluene-containing wastewater treatment. The morphology and structure of Fe 3 O 4 /PUF composite were characterized by X-ray diffraction, Fourier transform IR spectroscopy, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy, and magnetic property measurement system. These morphological investigations revealed that Fe 3 O 4 nano-particles were well dispersed into the matrix of PUF with nano-scale diameter particles. TG experiments indicated that the initial thermal weight loss temperatures of composite with the content of 2.5 wt% and 7.5% Fe 3 O 4 were increased by 7 and 16°C, compared with pure PUF. The degradation efficiency of toluene with magnetic PUF composite was much higher than that of pure PUF carrier, and the reason why the immobilization of microbial biomass of microorganisms on the magnetic PUF composite was much higher than that of the pure PUF. The prepared magnetic Fe 3 O 4 /PUF composite offered excellent thermal stability and medium paramagnetic properties. And this composite could not only increase the immobilized biomass of the microorganisms, but also enhance the COD removal efficiency of wastewater.

Preparation and Characterization of Some Magnetic Nanocomposites of Biodegradable Polyurethane Based on (s)-histidine

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Synthesis of Ni/Fe Nanoparticles Utilizing PVP–SDS Bound Micelles as a Template to Remove PCB77

“…[37][38][39] Subsequently, the collection was conducted by magnetic separation. The as-prepared Ni/Fe nanoparticles were stored in ethanol at 4 C or dried under vacuum before further experiments.…”

Preparation of novel magnetic polyurethane foam nanocomposites by using core-shell nanoparticles

“…Above all, the roles of inorganic such as magnetic iron oxide NP's (MNP's) by having unique and high performances are undeniable. For example, application of MNP's in the polymer matrix leads to the improvements in the thermal and magnetic properties and open new windows for the preparation of the new magnetic materials namely, magnetic polyurethane foams [13] . Among all of merits, the surface energy of MNP's is very high and tends to agglomerate and is very difficult dispersed uniformly in to the polymer matrix [14] .…”