Phase 3: Filter Tests

Figure 12: Change in concentration of metal ions removed through the filter

Figure 13: Metal ion concentration of the effluent compared to the MCL

Figure 12 shows the large decrease in the concentration of both lead(II) and zinc ions. The large decrease shows that the filter was effective in removing more than 90% of the metal ions. The concentration of the metal ions remained relatively constant up tillthe 2 hour mark. The concentration hovers around the 0.1-0.2 ppm mark as shown in Figure 13. The concentration of zinc ions remained consistently lower than the MCL of zinc (0.8ppm) as indicated in orange. However, the concentration of lead(II) ions remained higher than the MCL of lead (0.015 ppm), showing that the filter is ineffective in removing lead(II) ions to below a safe limit.