Pharmaceutical wastes
such as antibiotics in the industrially polluted water are hazardous
for the aquatic ecosystem and the environment and, hence, need to
be adequately treated. Prompt and efficient degradation makes the
microwave (MW) technique a cutting edge technology. Apart from promptness
and efficiency, the ideal MW catalysts need to be thermally robust,
recyclable, and economic. The coprecipitation synthesized highly crystalline
spinel nickel ferrite (SNFO, E
g ∼1.76
eV, M
s ∼20 emu/g) and zinc ferrite
(SZFO, E
g ∼2.47 eV, M
s ∼4 emu/g) atomic sheets are good MW absorbers
and result in ∼90% and ∼86% MW degradation efficiency,
respectively, for the tetracycline hydrochloride (TCH) antibiotic.
The whole reaction is completed within 15 min, and it demonstrates
the recyclability with the catalyst being unaltered. The ferrites
are not only of low cost but also thermally robust and magnetically
retrievable. The microwave degradation exhibits the pseudo-second-order
kinetics. The quality of water after the degradation, especially the
carbon content, has been quantified, and the degradation pathways
have also been determined.