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Media type:
E-Book
Title:
Catalytic Activities of the Vaterite and the Calcite Based Solid Supported Catalysts for Spontaneous Fenton-Like Dye Degradation
:
A Comparative Study
Description:
In recent times, to address the increasing threat posed by wastewater discharge from industries polluted with toxic contaminants, advanced oxidation processes (AOPs) have been adopted. In this work, we have tried to improve the performance of magnetite (Fe 3 O 4 ) nanoparticles when subjected as catalysts in Fenton-like processes involving dye-degradation. In vitro, biomineralized vaterite synthesized by a template-directed method was used as solid support for Fe 3 O 4 nanoparticles, and the composite was used as a catalyst to initially oxidize H 2 O 2 to liberate • OH, which behaved as active species to perform the subsequent degradation of potentially toxic organic dyes, Methylene Blue and Rhodamine B. As a comparison, the calcite phase, the most common phase of CaCO 3 , was also used as a support for Fe 3 O 4 . Comparative studies revealed that the use of solid supports had improved the catalytic activity of the material, biomineralized spherical vaterite microspheres being the better support. The magnetic nature of the catalyst makes it a great prospect towards reusability and its versatility was proven by its ability to perform in natural water sources; lake water and river water