<![CDATA[The adsorption of tartrazine dye on active carbon of mahagony (Swietenia mahagoni Jacq) rind has been done. Through acquired active carbon carbonations process, where was that rind at entry into furnace on temperature 500oC for 1 hour, afterwards is cooled and sieved to 50 mesh. Activation process was done through charcoal soaking in 4 M HCl solution for 15 hours and be dried on ovens at 110o C for 1 hour. After that, by the calcinations process in furnace at 450o C was streamed to gas N2 for 2 hours then analysed by X-ray diffraction (XRD) to charcoal before activation, after activation and after calcinations. Adsorption process to tartrazina dye utilize UV-Vis spectrophotometer was been done. Result of research are gotten optimum condition of active carbon which is on adsorben’s weight 1.0 g, contact time 40 minutes, pH = 3 and concentration of tartrazine dye on 30 ppm. Adsorption of tartrazine dye on the active carbon fits Freundlich's isotherm at the value correlation coefficient (r 2 ), value K F , and value n which is 98%; 0.015 and 1.186 respectively.]]>
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