Ultrapurification method and sampler

摘要

The remarkable metal binding properties of the dried biomass of the water fern Azolla are exploited to purify various contaminated liquids. One aspect of the invention relates to a method for the ultrapurification of an aqueous solution from a heavy metal ion comprising passing the solution through a dried biomass of the water fern Azolla. Further aspects relate to the reclamation of potable water from contaminated water and the purification of radioactivity contaminated liquid waste. Also disclosed is a sampler for determining the presence of a heavy metal ion in an aqueous solution comprising a receptacle containing a dried biomass of the water fern Azolla.