206 Screening of microorganisms for the removal of cadmium from the aqueous solution and removal of cadmium by selected strains

Abstract

Removal of cadmium from the cadmium solution using various microorganisms was examined. Gram-positive bacteria and actinomycetes were removed larger amounts of cadmium than other microorganisms, such as gram-negative bacteria , yeasts, and fungi. Arthrobacter nicotianae LAM 12342 can removed the largest amount of cadmium, which removed 547μmol cadmium per g dry wt. cells. The removal of cadmium using A. nicotianae was affected by the solution pH, concentration of cadmium, cell amount and temperature. Theremoval of cadmium was very rapidly.