Arsenic adsorption to pipe material, particularly corroded iron, is
well-characterized. Decontamination options have been explored,
and some data suggests that higher pH may be a decontamination
option for arsenic. NSF-60 pipe cleaning agents removed arsenic,
but results were similar to simple flushing. Mercury was shown
to adhere to cement-mortar infrastructure, but little data on iron
persistence was found. Decontamination with acidified potassium
permanganate was effective and should be attempted in future
studies.