AWWA WSC69990

This powerpoint presentation begins by providing a brief overview of distribution systemdecontamination research. The experimental plan includes:contaminate pipe by equilibratingwith contaminated tap water;initially using dichlorvos, an organophosphoruspesticide;cement-lined steel pipe and ironpipe;contamination confirmed viasolvent extraction and GC-MSanalysis; and,decontaminate by flushing,chlorine, and Simple Green. Method development included:contaminated pipe with ~1000 mg/L dichlorvos overnight(approximately 150 mg dichlorvos available for binding); and, tested extraction with tap water rinses and acetone/dichloromethane solvent rinses. Decontamination results are presented and preliminary conclusions were that:dichlorvos binds more to cement-lined pipethan iron; flushing provides significant removal ofdichlorvos from cement-lined iron pipe andiron pipe; and,decontamination agents such as chlorine andSimple Green seem to be efficacious. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

14

File Size:

1 file , 1 MB