Biosorptive removal of contaminating heavy metals from plant extracts of medicinal value

Granulated Cladosporium cladosporioides # 2 biosorbent removed lead and cad mium from aqueous extracts of Nordostachys jatamansi and Vitis vinifera wit h high efficiency. Different properties of the extracts such as pH, UV-visi ble spectra and total dissolved solids were unaltered after biosorption, in dicating that none of the components of the extracts were removed and the b iosorbent itself did not transfer its components to the extracts. These fin dings open up new avenues for the application of metal biosorption technolo gy.