as current technologies have many limitations (Wan et al. 2004). One relatively simple way to enhance the heavy metal
removal performance of existing stormwater treatment filters would be to incorporate
materials with a high affinity for dissolved heavy metals. Peat and compost are currently used
for this purpose, but compost is frequently contaminated with metals to the extent that it
becomes a source of metals rather than an adsorbent. Peat degrades over time and good
quality peat is a relatively expensive and scarce resource.