ADSORPTION OF PCB FROM CONTAMINATED SOIL USING NANO CLAY PARTICLES
The results of a study on adsorption of PCBs on nano clay are presented. Poly chlorinated biphenyl (PCBs) are of significant concern due their high toxicity and long environmental half-lives. Experiments were conducted using batch adsorption procedures at different PCBs concentrations from 10 to 60 mg/L. The amount of nano clay used were 0.03, 0.06, 0.09, 0.12, 0.24 and 1.2 g. Adsorption of PCBs solution onto the nano clay were characterized by an initial rapid adsorption which eventually became constant within 22 hours, perhaps due to limited surface area of the nano clay particles available for PCBs adsorption. The interactions have been studied with respect to the linear, Freundlich and Langmuir adsorption isotherms. It is found that then nano clay is a good adsorbent for PCBs.
SHARIAT MOBASSER AND MOHD RAIHANTAHA