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International Journal of Basic Science and Technology

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Archive | ISSUE: , Volume: Jan-Mar-2024

Statistical Analysis and Optimization Studies of Adsorption of Malachite Green Using Bean Husk


Author:Abdulsalam et al.,2024

published date:2024-Mar-26

FULL TEXT in - | page 16 - 23

Abstract

As a dye, the main constituent of textile industrial wastewater is carcinogenic this research focuses on the treatment of wastewater containing malachite green dye using bean husk. Using central composite design of design of experiment (DOE), the optimized effect of adsorbent dosage, contact time, speed, initial concentration of dye and temperature were studied. The FTIR of bean husk shows that the adsorbent has potential adsorption sites which are being represented by their functional groups: C-O (1050.21), O-H of alcohol (3432.0), S-H (2357.0), and C=C of alkene or aromatic ring (1633.3) to form bonds with the dye molecules. The surface image reveals that the adsorbent is highly porous and has readily available pores for the adsorption of dyes. With the study of the elemental composition of bean husk, it is revealed that it has a high percentage of carbon and carbon compounds (100%). The optimum points predicted for Malachite green onto bean husk are dosage of 3g, contact time of 105 minutes, temperature of 45oC, agitation speed of 125rpm and concentration of 75ppm. The linear model suggested shows a good fit and a high coefficient of determination, with R-Squared value of approximately 76.5% while the adjusted R-squared is 64.7%. The probability of F-statistics is 0.132 which is greater than 0.005, this further confirms the reason why the design expert software selected the linear model because it has an insignificant lack of fit.

Keywords: Adsorption, Central composite design, Malachite green, Wastewater, Bean husk

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