Traditional photocatalysts such as TiO2 and ZnO require UV
irradiations for water treatment, whereas 50% of easily available
solar energy constitutes visible irradiations. GSC provides better
photocatalytic activity under visible irradiation. Available water
purification technologies are costly, but the synthesis of GSC from
sugar and possible utilization of solar energy makes it cost effective.
Anchoring on sand particles makes GSC stable, hence applicable
to flowing water systems. Inhibitory activity of GSC against
harmful bacterium completes the water purification process. GSC
is entirely synthesized from sand and sugar which does not leave
out residual toxics. Thus development of stable, cost effective and
nontoxic commercial waste water treatment through GSC is
conceivable. The zone of inhibition obtained against bacterium
suggests applications in biomedical field. Simple regeneration and
reuse is an added advantage. Results obtained in this study illustrate
possibilities of engineering GSC incorporated purifier systems
which can be installed at the waste outlets of textile, sugar
mill and domestic waste water. Water from these outlets can be
readily reused.