TREATMENT OF TANNERY EFFLUENTS FROM ADSORTION IN CHITOSAN SUBMITTED TO IONIC LIQUID TREATMENT

Abstract

Initially, we performed the synthesis and characterization of sec-butylammonium acetate IL and chitosan activation with it. Afterwards, we used the activated chitosan to carry out the adsorption of chromium VI, which is the main metallic ion present in tannery effluents. The influence of the adsorbent storage time, adsorbent amount, test time, pH and temperature were analyzed. The storage time indicated low influence on the treatment and on the quality of the adsorbent; however, drying after the impregnation process gave the material greater adsorption capacity. The adsorption time was 1 hour, the ideal amount of 1.00 g and the temperature 25 ° C. Regarding pH, no significant changes were observed in the amount adsorbed between 2 and 4.5. These previously determined conditions were used for the treatment of the tannery effluent, verifying the efficiency of chromium VI concentration reduction.

Keywords

• efluente de curtume
• cromo hexavalente
• líquido iônico
• quitosana ativad