In this study, the possible utilization of rice husk activated carbon as an adsorbent for thernoptimum removal of methylene blue dye from aqueous solutions has been investigated. rnSelective criterions for rice husk activated carbon (AC) were carried out as follows: Porousrncharacteristics by, Brunauer-Emmett-Teller (BET) total surface area analyzer, surfacernstructure using Scanning Electron Microscope (SEM) and surface functional group usingrnFourier Transform Infrared Spectroscopy (FT-IR) analysis. The batch adsorption studiesrnof methylene blue (MB) carried out by selected porous ZnCl2 treated activated carbon.rnCCD at three-level and four factors were used to design the experiment to develop modelrnequations for MB removal. The AC was initially prepared through chemical activationrnusing zinc chloride (AC-ZC), phosphoric acid (AC-PA), and potassium hydroxide (ACPH)rnrnactivating agents at optimal conditions of (carbonization temperature 500rnC andrnholding time 60 min). The TSA were measured on BET 603 mrnorn2rn2rn/g, 545 mrn rn/grn2rnand 498 mrn rn/grnrespectively. The optimal results in effect of process parameters of the analysis were forrnoptimum adsorption of MB on selected porous AC-ZC 98.9 %, pH 8.69, adsorbent dosern1.9 g, and concentration of MB 11.63 g/ml and contact time 51 min. The results concludernthe locally studied activated carbon of rice husk could be employed as low-cost alternativesrnto commercially imported activated carbon for the removal of basic dyes during wastewaterrntreatment. This low cost and effective removal method may provide a promising solutionrnfor the removal of dye from wastewater.