Nano Science and Technology Institute
Nanotech 2009 Vol. 2
Nanotech 2009 Vol. 2
Nanotechnology 2009: Life Sciences, Medicine, Diagnostics, Bio Materials and Composites
Chapter 9: Nanocomposites

Synthesis and Characterization of Alginate-Based Magnetic Nanocomposite

Authors:T. Luna-Pineda, O. Perales-Pérez, F. Román-Velázquez
Affilation:University of Puerto Rico at Mayagüez, PR
Pages:495 - 498
Keywords:calcium alginate beads, magnetite, nanocomposite
Abstract:Our work addressed the development of a multi-purpose sorbent consisting of magnetite (Fe304) nanoparticles functionalized by dimercaptosuccnic acid (DMSA) and dispersed into porous calcium alginate beads (CAB). The resultant magnetic nanocomposite (MO-CAB) can be considered a novel, inexpensive and environmental-friendly sorbent to remove a variety of pollutants from water. Moreover, the magnetic nature of the nanocomposite will allow their fast recovery in actual water treatment schemes. CAB were prepared by drop-wise addition of an low viscosity alginate solution to a calcium chloride solution. Cross-linking time and beads drying method have been evaluated to obtain best mechanical strength in the sorbent. Magnetite nanoparticles averaging 12nm in crystal size were synthesized by coprecipitation. The composite was prepared by dispersing the nanoparticles at various volumetric loads during the formation of the alginate beads. In order to characterize the Mo CAB we used FTIR, XRD and magnetization analysis. In the FTIR spectrum we verified magnetite functionalization with DMSA.
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