Phytotechnology Projects

The study has analyzed the capacity of nine ramie cultivars to absorb and accumulate Cd through two years of micro-regional field.The Cd contents retained in different parts of ramie are ranked as the following: bast > stems > leaves.Ramie has the ability to accumulate large amount of Cd; under the treatment with 1.65,25 and 100 mg kg-1 of Cd, three times of ramie harvest annually remove 0.25,0.76 and 0.97 kg hm-2 a-1 of Cd respectively.

On the site of the waste pile 371 of WISMUT the first constructed wetland (4 serially connected basins) for the biological treatment of mining water in Germany was designed and built. For the discharge into a nearby river water, uranium and arsenic have to be removed. Extensive investigations on the management, robustness and long-time stability of the constructed wetland have been carried out. The operation under properly controlled redox conditions is essential to achieve low arsenic and uranium levels at the same time.

During the remediation of the remains of former uranium mining and processing, the treatment of water contaminated with radioisotopes and heavy metals is a task of high priority. BioPlanta has undertaken extensive investigations into the treatment of water from the pit Pöhla-Tellerhäuser (Germany). The results of investigations with pilot scale constructed wetlands provided data about the treatment efficiency under varying hydraulic and material load, variability of the efficiency, remobilization of pollutants and the distribution of removed contaminants among the wetland media (gravel, plants).