Removal methylene blue dye by Absorbent carbon nanotubes with response surface experimental design

In industrial water pollution, the color produced by minute amount of organic dyes in water is considered very important because, besides having possible harmful effects, the color inwater is aesthetically unpleasant. Colored water can affect plant life, and thus an entire ecosystem can be destroyed by the contamination of various dyes in water. Some dyes are also toxic and even carcinogenic. This dictates the necessity of dye containing water to undergo treatment before disposal to the environment. The conventional methods for color removal are biological oxidation and chemical precipitation]1-3[.The purpose of this study was to optimize methylene blue dye removal from aqueous solutions by carbon nanotube using Response Surface Method and Central Composite Design methods. The batch experiment was conducted to evaluate the effects of independent variables such as pH, dye concentration, dose of sorbent and contact time. For the experiment, Response Surface and Central Composite Design methods were applied to evaluate the effects of these variables. Analysis of variance (ANOVA) was used for statistical analysis. The optimum conditions for basic methylene blue dye removal were pH= 8/5, dye concentration= 12.5, absorbent dose= 0/011g and contact time= 15 min. The verified model is Quadratic and R-squared value of this Study was obtained to be The R-Squared Adjusted was obtained to be 81.52% and The Squared predicted R was obtained to be 27.84%.