Bentonite polymer composite for water purification

polyethylene glycol (PEG)–bentonite (BT) composite was prepared by direct polymerization of PEG in suspensions of BT. Based on detailed analyses using field-effect scanning electron microscopy, X-ray diffraction, surface area measurements and chemical methods, the obtained product was mainly composed of Ca-BT with a specific surface area of 4.13 m^2 g^-1 . The optimal conditions for adsorption of Pb^2+ and Cd^2+ ions were found to be a PEG content of 0.1