Dyes are the main input as a coloring agent for
textile and some other industries. When these
wastewaters enter into nearby marine environment, it can
harm marine species and pollute the whole freshwater
ecosystem. So, treatment of these industrial effluents is
necessary before discharging it to the environment.
Currently, we have synthesis a non-toxic and biogenic
CaO nanoparticle from the leaves of Murraya koenigii
leaves. Then the nanoparticles were characterized using
UV, FTIR, XRD, SEM and TEM. The UV data shows
absorbance at 345 nm. While the obtained band gap was
about 2.5 eV. Further, characterization tests confirmed
the formation of CaO nanoparticles. CaO nanoparticles
was applied for treatment of methyl red and methyl blue
dyes solutions under UV light and without UV light in
order to check its degradation capability. Methyl red
degradation was slow as compared to methyl blue. The
results obtained shows that, under UV light the
synthesized nanoparticles fully degrade methyl blue in 20
minutes. Whereas, 70% methyl red was degraded in 60
minutes under UV light. While, without UV light the
degradation was about 10% for methyl blue and 5% for
methyl red respectively.