THE RECOVERY OF THE WASTE FOOD DATES PITS IN THE FIELD OF INDUSTRIAL LIQUID EFFLUENT TREATMENT
The present study focuses on the recovery of the waste food, the date stones, in the field of industrial liquid effluent treatment. The material was used in its native form as well as chemically activated by phosphoric acid to improve its adsorptive capacity. A range of physic-chemical analyses was performed, for the characterization of adsorbents used, among them: FTIR spectroscopy. In order to test the performances of these adsorbents we are interested in cationic dye, methylene blue, considered as pollutant. The effects of several parameters such as contact times, initial concentration of dye, solution pH, and temperature were studied in batch system. The result showed that the contact time for removal of all the dyes is about ten minutes, for different concentrations of the solution studied 20 and 100 mg/L. For a pH range that varies between 2 and 9, it was found that a large percentage removal of dye was found for pH values above 4. Modeling of experimental results was performed using models of Langmuir and Freundlich isotherms, which show that adsorption follows the Langmuir model with high correlation coefficients.
Abed, F. 2013. THE RECOVERY OF THE WASTE FOOD DATES PITS IN THE FIELD OF INDUSTRIAL LIQUID EFFLUENT TREATMENT. Acta Hort. (ISHS) 994:241-246
recovery, stones, adsorption, modeling, methylene blue