Removal of cadmium ions in wastewater through biosorption

Cadmium ions in wastewater can be removed by biosorption on to Acinetobacter calca var. antratus, isolated from a wastewater sample from a copper refinery. There are two equillibrium states: the first, which is reached quickly, is probably direct adsorption, and the second may be due to the release of ion adsorption materials by lysed cells.The authors are with the Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 10764, ROC.