This powerpoint presentation begins by providing a brief overview of point-of-use (POU) devices and NSF/ANSI 53, a recognized standard that covershealth effects specifically for POU devices, and can include lead (Pb) removal. Project objectives included the following: compare dissolved and particulate Pb removalefficiency for diverse types of POU devices (pour-throughpitchers, tap-mounted, under-the-sink);evaluate metal removal by pour-through pitchers (Pb,Cu, Ni, Cr);assess Ag leaching by pour-through pitcher filters;measure the effect of POU filters on water quality parameters atthe effluent;evaluate the effect of filter nitrification on thedissolution of Pb particles trapped in the filter; and,evaluate the efficiency and applicability of under-the-sinkPOU devices to solve dissolved and particulate Pbchallenges in large buildings. Study methodology included the following 5 experiments:tested metal removal by pour-through pitchers, with andwithout additions of Pb, Cu and Cr in feed water;tested pour-through pitchers for Pbsubpart/sub removal, andmeasured the effect of filters on NHsub3/sub-N and pH;same as (I) but in real household using time andwithout any metal addition in feed water;compared Pbsubdiss/sub and Pbsubpart/sub removal for 3 types ofPOU using a pilot (3 pitchers, 2 tap-mounted devices,2 under-the-sink devices), and evaluated the effect ofPOU filters on water quality parameters at the effluent; and,tested the applicability (cost-efficiency) of under-the-sinkPOU devices in a large building presenting high levels ofPbsubdiss/sub and Pbsubpart/sub. Includes figures.
Keywords: Home Water Treatment Units; Filters; Metals; Lead; Effluents; Particulates; Standards; Costs; pH
