Uptake of Cd (II) from Aqueous Solution by Bacillus Biomass

Industrial and agricultural activities cause release of heavy metal and toxic metals in the environmental that is life and ecosystem health risks for humans. Unfortunately due to heavy metals in solution in water into the ecosystem and causing water damage to these ecosystems are easily displaced in food chain and cause human and animals are threatened. The aim of this work is to investigate Bacillus sp. strain MGL-75 as biosorbent, for the fixation of Cd ion in batch reactor. In the first experiment, biosorption kinetics and isotherms have been performed at pH 6.5.The equilibrium time was about 5 min and the adsorption equilibrium data were well described by the Langmuir`s equation. The maximum capacity has been extrapolated to 0/75 mmol/g. In the second part of the work, the release of Cd ions, by bacteria release factors include: Ethylene Diamine Tetra Acetic Acid, potassium chloride, calcium chloride, hydrochloric acid, acetic acid and nitric acid is investigated. In the final section, the effect of autoclave, 2, 4 Dinitrophenol and Na-Azid, has been investigated. Optimum pH for the biosorption of cadmium was about 6.5.