Adsorption processes.Small granules instead of heavy metal substances, mainly large brown clay tablets instead. When he absorbs the movement. Tablets of heavy metals would move to the island around clay tablets.
Process absorb the smaller ones instead of heavy metals. The big grain brown soil. Upon entering the adsorption process Tablets of heavy metals to move around the island soil.
The process absorb to grain instead of heavy metal. The big brown instead of granular soil. When entering the adsorption process Tablets of heavy metals will move the island around the granular soil.