passed through columns of crushed mussel shell the retention of the metals was initially very close to 100%, and continued toremain very high despite subsequent relatively heavy loadings of dissolved metals. For
example, a column of 150 g of crushed mussel shell with a particle size range of 125 – 2000 μm
removed 99.8% of 0.03 mMol of dissolved Zn, after previously sequestering 22.8 mMol of Zn
(Macaskill 2008).