The feasibility of using major clays such as kaolin in the adsorption processes, can occur through chemical modification by intercalation in their structures phyllite. Samples of kaolin in the region of northeast Brazil, one white and one gray of a portion of the region Borborema-served in the state of Paraiba, were interspersed with dimethylsulfoxide, oxalic acid and citric acid. The characterization natural and modified techniques were used X-ray diffraction, thermal analysis and absorption spectroscopy in the infrared.
kaolin; intercalation; dimethyl sulfoxide; oxalic acid; citric acid
