Adsorption of p-nitrophenol onto acacia glauca saw dust and waste orange peels activated carbon: application of Taguchi’s design of experiment

Abstract

The study shows the application of Taguchi's design of experiment method to optimize the parameters for adsorption of p-Nitrophenol (p-NP) on the surface of acacia glauca saw dust activated carbon (AGAC) and waste orange peels activated carbon (ACOP) from aqueous medium. The effect of adsorption parameters viz. adsorbent dose (m), temperature (T), initial concentration (C 0 ) and contact time (t) on response characteristics i.e. adsorption capacity (q t ) has been studied at three levels by using L 9 orthogonal array (OA) which further analysed by variance analysis (ANOVA) for adsorption data and signal/noise ratio data by using 'larger the better' characteristics. The ANOVA shows factor A (m) and B (C 0 ) are the most significant parameters with the contribution of 51.27 and 11.40%, and 40.74 and 80.90% for AGAC and ACOP respectively. Factor C (T) and D (t) are found to be least significant parameters. The percent removal of p-NP at optimum condition was found to be 96.11 and 92.40% with 72.08 and 34.56 mg/g adsorption capacity at m = 2 and 4 g/L, C 0 = 150 and 150 mg/L T = 313 and 303 K and t = 90 and 90 min for AGAC and ACOP respectively.

Reconstruction of the Taguchi Orthogonal Arrays with the Support Vector Machines Method

“…Here, for example, the array denoted as L4(2 3 ), 4 is the numbers of experiments(runs), 3 factors with 2 levels (variable) for each factor. Similarly, mixed-level sequences are defined in the Taguchi catalog.…”

“…Also, Taguchi designs use in Environmental Sciences [3,4], Agricultural Sciences [5], Physics [6], Chemistry [7], Statistics [8], and Medicine [9] frequently. However, Genichi Taguchi did not share any information about the methods that are used to construct these arrays.…”

Acetaminophen removal using porous activated carbon derived from corn cob: optimization and mass transfer modelling

“…Some of them include almond shells, rice husks, cherry stones, meranti woods, orange peels, olive stones, coconut husks and jengkol peels amongst others. [28][29][30][31][32][33][34][35] In addition, AC has been extensively employed in wastewater treatment due to its paramount properties, such as a porous structure, very large surface area and the ability to adsorb pollutants selectively. 36,37 For instance, Spessato et al 38 successfully achieved maximum acetaminophen adsorption capacity (Q m ) for super-activated carbon at 356.22 mg g −1 .…”