BITUMINOUS COAL FOR THE TREATMENT OF CD(II) RICH WATER

The sorption of Cd(II) on bituminous coal has been found to be depende nt on contact time, concentration, temperature and pH. The process of removal follows first order kinetics. The temperature dependence indic ates the endothermic nature of process. Alkaline aqueous medium favour s the removal of Cd(II) by bituminous coal. The increase in sorption o f Cd(II) with pH has been explained on the basis of interaction with o rganic as well as inorganic matters present in coal. Intraparticle dif fusion has been found to be a rate limiting step.