POTENSI BUBUK DAN ARANG BIJI NANGKA TERAKTIVASI ASAM NITRAT (HNO3) SEBAGAI ADSORBEN UNTUK PENJERAPAN ZAT WARNA CRYSTAL VIOLET

Abstract

The aim of this study was to analyze the adsorption efficiency of activated jackfruit seeds powder and carbon to remove crystal violet in solution. Jackfruit seeds carbon made by carbonization at 400℃ for 3 hour. Jackfruit seed powder and carbon were activated with 0.3 M nitric acid (HNO3) with adsorption efficiency tested by varying the adsorbent doses (0.1, 0.3, 0.5, 0.7 and 0.9 g) and optimum contact times (30, 60, 90, 120, 150, 180 and 210 minutes) which were analyzed using a UV-Vis Spectrophotometer instrument. The adsorbent samples were also characterized for their surface morphology using SEM instruments and functional group determination analysis using FTIR instruments. The results showed that the adsorption efficiency of HNO3 activated jackfruit seed powder to remove crystal violet was achieved at a dose of 0.7 g and a contact time of 90 minutes with an efficiency of 97.50%, while the jackfruit seed carbon was at a dose of 0.5 g and a contact time of 180 minutes with an efficiency of 60.08%. Based on the research that has been done, it can be seen that activated jackfruit seeds powder have the better potential and effectiveness to remove crystal violet dye in solution than activated jackfruit seeds carbon.