Synthesis of novel biocomposite powder for simultaneous removal of hazardous ciprofloxacin and methylene blue: Central composite design, kinetic and isotherm studies using Brouers-Sotolongo family models

Abstract

Highlights  Novel biocomposite powder was simply prepared from Reed plant.  Ciprofloxacin and methylene blue were first time simultaneously removed.  Operating parameters were optimized by CCD-RSM methodology.  Kinetic and isotherm models were studied using Brouers-Sotolongo family equations.  Biosorption mechanisms were discussed.

Production of modified sunflowers seed shells for the removal of bisphenol A

“…They are based on an adsorption energy distribution model. 33 On this basis, various classical and stochastic adsorption isotherm models were selected among many others to represent the schemas of the evolution of the experimental data ( Table 3). The isotherm equations allow deductions, in addition to the maximum quantities adsorbed by the surface of the adsorbents and the equilibrium parameters, of the residual concentration corresponding to half the initial value C e .…”

“…The coefficient a describes the shape and width of the adsorption energy distribution which is related to the heterogeneity of the material. 33,35 When the parameters a, b and c of the GBS model developed on a statistical basis have well-dened values, it is easy to deduce the equations of the canonical isotherms (Langmuir, Freundlich, Jovanovich) and those bases on the fractal model (BS, HS and BG). This unied general formulation makes it possible to pass easily from one to another of the models by using the same equation.…”

“…Furthermore, it has been shown that an increase in the c value indicates a decrease in surface heterogeneity or the opposite. 33 Fig . 16 illustrates the t of BPA adsorption data onto ACS75 at pH ¼ 2 by the models enumerated in the materials and methods section (canonical: Langmuir, Freundlich, D-R, Jovanovich, Temkin and fractal models: BS, GBS, BG, HS).…”

“…16,22,26,27 For more than two decades now, the Brouers-Sotolongo fractal kinetics model (BSf (n,a)) and General Brouers-Sotolongo fractal isotherm models (GBS (a,b,c)) have been invoked and used in some problems and especially in the modelling of the adsorption solid-liquid process. [28][29][30][31][32][33][34] The two most commonly applied BSf models are Weibull (n ¼ 1) and Hill (n ¼ 2) kinetics, which are the corresponding fractal-like models of the canonical Pseudo First Order (PFO) and Pseudo Second Order (PSO) models. In comparison to canonical models, widely used in adsorption, for kinetic or equilibrium studies, stochastic/fractal-like models offer greater exibility and are based on phenomenological laws, taking into account the heterogeneity of the adsorbent surface.…”

Multivariate Optimization of Removing of Cobalt(II) with an Efficient Aminated-GMA Polypropylene Adsorbent by Induced-Grafted Polymerization under Simultaneous Gamma-Ray Irradiation

“…The adsorption of different metals by the adsorbent is subject to several conditions, the infinity of which is not practically possible. Various software, such as Design Expert, which with statistical and mathematical models, has made it possible to study different adsorption conditions and different adsorption synthesis conditions [31][32][33] .…”