Remediation will be required where a risk assessment has concluded that contamination poses an unacceptable risk to a receptor (e.g. a public water supply well). The success of the remediation of contamination relies to a large degree on the selection of appropriate remediation techniques under the given field conditions.

Constructed wetlands as a treatment technology uses natural geochemical and biological processes inherent in the wetland ecosystem to remove metals, and other contaminants from influent waters through filtration or degradation processes. Applications include e.g. the treatment of urban stormwater. However, the technique has also been used to aid the remediation of e.g. acid mine drainage, or landfill leachate.

Develop a PowerPoint presentation of max. 10 minutes on the topic to answer the following questions:

1) How does the technique work?

2) For which contaminant can the technique be used?

3) Under which field settings can this technique be used?

4) What timelines are involved to clean-up the contamination when using this technique?