This powerpoint presentation begins by providing a brief overview of distribution system
decontamination research. The experimental plan includes:
contaminate pipe by equilibrating
with contaminated tap water;
initially using dichlorvos, an organophosphorus
pesticide;
cement-lined steel pipe and iron
pipe;
contamination confirmed via
solvent extraction and GC-MS
analysis; 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 pipe
than iron; flushing provides significant removal of
dichlorvos from cement-lined iron pipe and
iron pipe; and,
decontamination agents such as chlorine and
Simple Green seem to be efficacious. Includes figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 11/01/2009 |
