Photodegradation is one of the advanced oxidation processes rather than other treatments and it is most effective for the removal of organic pollutants. ZnO is an excellent photocatalytic oxidation material. In the present study nanosized ZnO has prepared by coprecipitation technique under different experimental conditions and employed in the removal of dyes colour.

A physico-chemical profile study on the soil along the banks of the Amaravathi river that runs across Karur areas of Tamil Nadu was investigated in the year 2010-11 for possible evidence of industrial waste disposal or seepage in general and textile dyeing and bleaching industrial waste liquids and solid sludge in particular and by the various medium to small scale industrial activities taking place within the areas.