The prospective of using Passiflora Foetida seed modified PAC-MnO2-NC to eliminate the dyenamely Reactive Yellow 4 dye are studied. The result of more than a few parameters such as adsorbent dosage, contacttime, temperature, the initial concentration of the adsorbate and pH has been evaluated. Tempkin, Halsey, Langmuir,Dubinin-Radushkevich and Freundlich isotherms are too studied. The course showing that PAC-MnO2-NC is suitable to employ as an adsorbent to carry away Reactive Yellow 4 dye