Surfactant modification and adsorption properties of clinoptilolite for the removal of pertechnetate from aqueous solutions
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Natural clinoptilolite modified with a cationic surfactant stearyldimethylbenzylammonium chloride (SDBAC) was used as an adsorbent for the removal of pertechnetate from aqueous solutions. Adsorption studies were performed in a batch system. The effects of various experimental parameters (amount of surfactant loading, contact time, solution pH, competing anions) on the removal efficiency of TcO4 − were investigated. SDBAC-clinoptilolite with organo-bilayer was successfully used to remove TcO4 − from aqueous solutions in the pH range of 5.0-8.0. ReO4 − as an analogue of TcO4 − was used to model the isotherms. Adsorption capacity of the SDBAC-clinoptilolite and the mechanism of ReO4 − (TcO4 −) sorption were also determined.
KeywordsAdsorption 99Tc Surfactant SDBAC Organo-modified clinoptilolite
We acknowledge the support to this work provided by the Ministry of Education, Science and Technological Development of Serbia through the projects TR 033007, III 45012 and III 45006.
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