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Title

THE SURVEY OF CHROMIUM (VI) ADSORPTION FROM AQUEOUS SOLUTIONS BY POWDER AND ACTIVATED CARBON OF PINE CONES

Pages

 Start Page 227 | End Page 234

Abstract

 Background & objeftive: The hexavalent chromium is a toxic and water-soluble heavy metal that is absorbed and stored through the digestive system and through the skin in the human body. Since the amount of chromium is impermissible in drinking water of Birjand. The purpose of this study was to investigate the possibility of hexavalent chromium elimination from aqueous solutions using PINE FRUIT POWDER and its ACTIVATED CARBON.Methods and Materials: In this research, for Calculate removal efficiency (Re), five parameters including contact time, pH, adsorbent dose, initial Cr (VI) concentration and Temperature was studied to evaluate the efficiency of these adsorbents in elimination of chromium. Experiments were intermittently performed in batch reactor on shaker.Results: The results showed that the adsorption of chromium significantly depends on the pH of the solution. The maximum adsorption rate of chromium was achieved in the pH of 3 for powder, and 1 for ACTIVATED CARBON. The maximum removal efficiency of Cr (VI) was 96.5 % for PINE FRUIT POWDER, and for ACTIVATED CARBON of pine cones was 93.958%. According to the obtained results, the adsorption of soluble chromium ions was fitted to the Langmuir ISOTHERM model.Conclusion: The most removal of the hexavalent chromium happened by PINE FRUIT POWDER and pine cones can be used as an effective and inexpensive method to remove the hexavalent chromium from aqueous solutions.

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