Affiliation:
1. RV College of Engineering
Abstract
Abstract
The effectiveness of citric acid modified biomasses Rice Husk (RH) and Water Hyacinth (WH) in removing Congo Red (CR) dye from its aqueous solution was studied. The modified biosorbents were characterized using FTIR and SEM. The optimum conditions of parameters- pH, adsorption time and adsorbent dosage, were evaluated using Box-Behnken Design (BBD) and Response Surface Methodology (RSM) to maximize dye removal. For WH the optimum removal was 91.4% in time 22.649 minutes, at pH of 2.0 and adsorbent dosage of 0.198 g for 20mL of dye, which was obtained with a regression coefficient R2 value of 0. 9905. Whereas for RH the optimum was 88.204% removal in 34.048 minutes, at pH of 2.0 and adsorbent dosage of 0.189 g in 20mL of dye with R2 value of 0.9828. The model of the mechanism of adsorption and the multi-factor interactions were arrived at through statistical modelling and testing of the adsorption equilibrium data. Overall, this research focuses on sustainable and effective methods for removing Congo Red dye from water using modified agricultural waste biomass.
Publisher
Research Square Platform LLC
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