Putra, F. P.AmanDrastinawati2015-12-122015-12-122015-12-12Rio Andikahttp://repository.unri.ac.id/xmlui/handle/123456789/7639Use of Methylene Blue as a main ingredient in the dye becomes a problem for environmental pollution. It also occurs in the use of coal as fuel is increasing linearly who will be directly proportional to the fly ash waste generated. This study aims to determine the optimum conditions of adsorbent size and the speed of stirring. Adsorption of Methylene Blue performed by mixing with coal fly ash on the condition of adsorbent size (> 100 and 100- 200) mesh and stirring speed (160, 180, 200, 220 and 240) rpm. Adsorption results were analyzed by using a spectrophotometer, the optimum conditions obtained capacities variation of fly ash on the adsorbent is 100-200 mesh size and the optimum conditions capacities fly ash at variable speed is 180 rpm. Adsorption shows a decrease in the power jerap fly ash Methylene Blue dye from the initial 10 mg / g adsorbent to 0.666 mg / g of adsorbent.otherstudent Paper Post Degree