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Arsenic Remediation with Dried Plant

Quantity vs. Time Experiment

For this experiment, we want to analyze for 2 things:

  • The time to reduce the arsenic contamination level below 10μg/L (WHO standard).
  • Adsorbent quantity vs. level of contamination.
  • Various experiments of contamination level vs. amount of adsorbent was conducted and the results are as follow:

    Water Hyacinth Water Lily Duckweed Fern

    Duckweed (Azolla Caroliniana)

    At 100ppb As contamination level and using 2gr of duckweed as adsorbent, it only took 15 min to reduce below WHO (<10ppb) level. As contamination level double, 3gr are needed.

    Duckweed (Lemna minor)

    Duckweed, or water lens, are flowering aquatic plants which float on or just beneath the surface of still or slow-moving bodies of fresh water and wetlands. These plants are very simple, depending on the species, each plant may have no root or may have one or more simple rootlets. One of the more important factors influencing the distribution of wetland plants, and aquatic plants in particular, is nutrient availability. Duckweeds tend to be associated with fertile, even eutrophic conditions. They can be spread by waterfowl and small mammals, transported inadvertently on their feet and bodies, as well as by moving water.