Comparison Uptake of Cadmium (II) from Wastewater, Onto Brown Alga and Bacterium

Amongst the environmental problems, environmental pollution by heavy metal can be pointed. The aim of this work is to investigate adsorbing Cadmium (II) a brown alga Fucus serratus and its uptake by gram-positive bacteria Bacillus sp. Biological methods in comparison with conventional chemical and physical methods have higher efficiency. In this study, isotherm and kinetics of cadmium (II) uptake by bacteria and algae in batch reactor is studied. Langmuir equation based on the maximum rate of uptake of cadmium (II) in bacteria and algae is achieved. The bacillus sp selected in Tehran, and algae brown Fucus serratus harvested from Ponic city in ocean Atlantic in France. This study has shown cadmium (II) uptakes, equilibrium time for algae is about 240 minutes and for bacteria is about 10 minutes respectively. The adsorption equilibrium date was well described by Langmuir equation. The maximum capacity has been extrapolated to 0/45, 0/85 mmol /g for bacillus and F. serratus respectively. All these observation indicate that, this biomass (alga) could be a suitable sorbent for the removal of cadmium from wastewaters.