BARIUM CHLORIDE MODIFICATION OF DIATOMITE FOR REMOVAL OF METHYLENE BLUE AND LEAD ION FROM AQUEOUS SOLUTION

摘要

In this research, the surface of natural diatomite was modified with Barium chloride by hydrothermal method for removal of methylene blue and lead ions. The characterization of natural and modified diatomite was investigated by SEM, FT-IR and XRD. The Brunauer-Emmett-Teller (BET) surface area exhibited that the similar surface areas were obtained between the clean diatomite and modified diatomite. In this study, modified diatomite was attempted to enhance the adsorptive capabilities of diatomite for methylene blue and lead ions. The effect of some operational parameters such as initial concentration and pH on the adsorptive capacity of the diatomite was tested. The sorption rate was affected significantly by the initial concentration of the solution, sorbent amount and pH value of the solution. Batch experiments were conducted to investigate the adsorption effect under different initial concentration (ranging from 50 to 200 mg/L), solution pH (4, 6, 8 and 10), and contact time (0.5 to 12h)