ATRAZINE REMOVAL USING OZONE AND GAC - A PILOT-PLANT STUDY

A two-week study was conducted using the Lincoln (Nebraska) Water Syst em's pilot-plant facilities. Atrazine-spiked water was treated using o zonation and granular activated carbon (GAC) adsorption. Ozone effecti vely oxidized atrazine, and a reduction in the concentration of the pa rent compound of more than 80% was observed using an ozone dosage of o nly 3 mg/L. Ozonation was less effective when the ozone was quenched i mmediately by passing the water through an anthracite filter. Measurab le quantities of deethylatrazine and deisopropylatrazine were produced , indicating that the atrazine was not being mineralized. Fresh GAC co lumns effectively adsorbed both atrazine and its measured decompositio n products, but their ability to do so over an extended period of time was not examined.