Ostroumov S., Shestakova T. Decreasing the measurable concentrations of Cu, Zn, Cd, and Pb in the water of the experimental systems containing Ceratophyllum demersum. // Doklady Biological Sciences 2009,  428: 444-447. [Finding: aquatic plants C. demersum induced a removal of heavy metals Cu, Zn, Cd, and Pb from water]   http://scipeople.ru/ users/2943391/;  http://sites.google.com/site/9dbs444/decreasing-the-measurable-concentrations-of-cu-zn-cd-and-pb-in-the-water