Optimal Removal of Methylene Blue in Aqueous Solution Using Selected Rice Husk Activated Carbon from Pore Development Agent.

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Addis Ababa University


In this study, the possible utilization of rice husk activated carbon as an adsorbent for the optimum removal of methylene blue dye from aqueous solutions has been investigated. Selective criterions for rice husk activated carbon (AC) were carried out as follows: Porous characteristics by, Brunauer-Emmett-Teller (BET) total surface area analyzer, surface structure using Scanning Electron Microscope (SEM) and surface functional group using Fourier Transform Infrared Spectroscopy (FT-IR) analysis. The batch adsorption studies of methylene blue (MB) carried out by selected porous ZnCl2 treated activated carbon. CCD at three-level and four factors were used to design the experiment to develop model equations for MB removal. The AC was initially prepared through chemical activation using zinc chloride (AC-ZC), phosphoric acid (AC-PA), and potassium hydroxide (ACPH) activating agents at optimal conditions of (carbonization temperature 500 C and holding time 60 min). The TSA were measured on BET 603 m o 2 2 /g, 545 m /g 2 and 498 m /g respectively. The optimal results in effect of process parameters of the analysis were for optimum adsorption of MB on selected porous AC-ZC 98.9 %, pH 8.69, adsorbent dose 1.9 g, and concentration of MB 11.63 g/ml and contact time 51 min. The results conclude the locally studied activated carbon of rice husk could be employed as low-cost alternatives to commercially imported activated carbon for the removal of basic dyes during wastewater treatment. This low cost and effective removal method may provide a promising solution for the removal of dye from wastewater.



Adsorption, activated carbon, rice husk, methylene blue