[en] Metapure biomass is a low cost patented material based on a dried plant (Azolla). It binds and concentrates various metal ions from water over a broad range of concentration (ppm to below ppt) and pH (2-12.5). Filtering system based on Metapure can be used for the remediation of industrial waste water and especially for the nuclear industry for the removal of radionuclides from liquid waste. After ts use, it can be easily incinerated at low temperature (350 - 500 deg C) to radionuclides enriched ashes, reducing the waste for disposal up to 1/10, without any loss of the accumulated radioactive isotopes. Meta pure biomass has low affinity for Na ions, while retaining its binding properties for other metal ions, and was proved to be quite efficient in brine solutions. Laboratory experiments, have shown the Metapure efficiency for the removal of isotope traces from high hardness tap water and from brine solution. The removal of Co-60 by Metapure from waste water was tested on site at the Comanche Peak power station (USA). A small scale filtering system for Co-60 removal from high alkaline waste water, is now in operation at Soreq Nuclear Research Center