|
Abstract
|
In this work, an alginate–montmorillonite–polyaniline (Alg–MMT–PANI) nanocomposite
(NC) was synthesized and applied for the adsorptive removal of reactive Orange 13 (RO13) as a
model azo dye compound. The Alg–MMT–PANI NC was prepared by the polymerization of aniline
in the presence of Alg–MMT hybrid through in situ polymerization. The optimization and
modeling of the removal process was carried out using the response surface methodology (RSM)
based on central composite design (CCD). Important parameters influencing the adsorption
removal of RO13, including the initial concentration of RO13, pH, adsorbent dose, and contact
time, were selected as input variables for RSM. Furthermore, the adsorption kinetic studies
revealed that the experimental data best fitted with a pseudo-second-order model. Additionally,
adsorption isotherm studies revealed that the obtained data were well fitted to the Langmuir isotherm
model and, accordingly, the maximum adsorption capacity, qm, was obtained at level of
111.111 mg/g.
|