A process for the removal of metal ions from solution and means for effecting such removal are described. The process is based on the hydroponic growth of sunflowers, terrestrial turfgrasses and/or members of the family Brassicaceae in solutions containing one or more metal ions. Metal ions can be efficiently...http://www.google.com.au/patents/US5393426?utm_source=gb-gplus-sharePatent US5393426 - Method for removing soluble metals from an aqueous phase
