Abstract
Azo dyes, such as Remazol Black B, are different from conventional dyes in that they establish covalent bonds with textile fibers like cotton. They are widely utilized in the textile industry because of their favorable properties of bright color, water resistance, simple application procedures, and low energy consumption. Their discharge into receiving streams has major environmental consequences, such as reducing photosynthesis in aquatic life due to lower light penetration. The biosorption isotherm data of Remazol Black B dye biosorption by Aspergillus flavus were investigated using two models—pseudo-1st order and pseudo-2nd order—and fitted using non-linear regression. The pseudo-1st order model was found to be the best by statistical analysis using root-mean-square error (RMSE), adjusted coefficient of determination (adjR2), bias factor (BF), accuracy factor (AF), corrected AICc (Akaike Information Criterion), Bayesian Information Criterion (BIC), and Hannan–Quinn information criterion (HQC). At 250 mg/L, kinetic analysis using the pseudo-1st order model yielded an equilibrium sorption capacity qe of 4.61 mg/g (95 % confidence interval from 4.54 to 4.68) and a pseudo-1st-order rate constant, k1 of 0.15 (95% C.I. from 0.128 to 0.164).
Highlights
Dyes are one of the most important hazardous compounds found in industrial effluents that must be treated because their presence in water bodies reduces light penetration, preventing photosynthesis of aquatic flora as well as being aesthetically objectionable for drinking and other purposes [1]
The pseudo-firstorder model was found to be the best using statistical analysis based on root-mean-square error (RMSE), adjusted coefficient of determination, bias factor (BF), accuracy factor (AF), corrected AICc (Akaike Information Criterion), Bayesian Information Criterion (BIC), and Hannan–Quinn information criterion (HQC)
At 250 mg/L, kinetic analysis using the pseudo1st order model yielded an equilibrium sorption capacity qe of 4.61 mg/g (95 % confidence interval from 4.54 to 4.68) and a pseudo-1st-order rate constant, k1 of 0.15 (95% C.I. from 0.128 to 0.164)
Summary
Dyes are one of the most important hazardous compounds found in industrial effluents that must be treated because their presence in water bodies reduces light penetration, preventing photosynthesis of aquatic flora as well as being aesthetically objectionable for drinking and other purposes [1] Azo dyes, such as Remazol Black B, are different from conventional dyes in that they establish covalent bonds with textile fibers like cotton. The published data (figure 6) from Biosorption of Remazol Black B dye (azo dye) by growing Aspergillus flavus [[5] is remodelled using different kinetic models, regressed using nonlinear regression approach, and the best model was determined using various error function analyses The purpose for this modeling analysis is that in the original paper, there was no modeling exercise for the kinetics
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