Cross-Linked Chitosan-Glyoxal/Kaolin Clay Composite: Parametric Optimization for Color Removal and COD Reduction of Remazol Brilliant Blue R Dye

Abstract

Kaolin clay (KN) was employed as an inorganic filler to modify a cross-linked chitosan-glyoxal as Schiff's-based chitosan composite derivative (CTS-GLY). The resulting (CTS-GLY/KN) was found to be a promising composite synthetic biopolymer that can be potentially utilized for color removal as well as COD reduction of an industrial anionic dye (remazol brilliant blue R, RBBR). The surface porosity, crystallinity, morphology, functionality, charge, and amine content of the CTS-GLY/KN were studied using BET, XRD, SEM, FTIR, pHpzc and pH-potentiometric titration analyses, respectively. Response surface methodology-Box-Behnken design (RSM-BBD) was used to optimize the impact of the main input factors on the color removal and COD reduction of RBBR. The adsorptive performance CTS-GLY/KN towards RBBR was well-defined by both Langmuir and Freundlich isotherm models with highest adsorption capacity of 447.1 mg/g at 30 ˚C. This finding reveals that CTS-GLY/KN can be utilized as a promising, feasible, and environmentally friendly composite-biosorbent for color removal and COD reduction of textile dyes from aqueous medium.

A formulation design and preparation of gold‐free purple of Cassius based on the doped malayaite

“…The general form of the second‐order model was applied for optimization of the process conditions as follows 29 : $$$$\begin{equation}Y{\rm{ }} = {\beta }_0 + \mathop \sum \limits_{i\ = \ 1}^n {\beta }_i{\chi }_i + \mathop \sum \limits_{i\ = \ 1}^n {\beta }_{ii}\chi _i^2 + \sum \mathop \sum \limits_{p < i} {\beta }_{pi}{\chi }_p{\chi }_i + \varepsilon \end{equation}$$$$where Y is the response value (CIE‐ L * a * b * ) and $${\chi }_i$$ is the design value. β 0 , $${\beta }_i$$, $${\beta }_{ii}$$, and $${\beta }_{pi}$$ are parameters to be determined and ε is the error.…”

“…The general form of the second-order model was applied for optimization of the process conditions as follows 29 :…”

Employment and performance of modified chitosan for the removal of copper ions and methylene blue in wastewater

“…Otherwise, the of carboxylic groups (COOH) existed in S1 could be ionized to form carboxylate groups with the negative charge (COO À ) that improve the electrostatic repulsion forces in polymeric backbone that resulted in the creation of ionion interaction between the anionic carboxylate and the cation groups in the MB molecules in S1. [23,54] A representation illustration of the adsorption capacity of S1, S2 or S3 is depicted in Scheme 2.…”

Effective Removal of Metal ion and Organic Compounds by Non-Functionalized rGO

“…Therefore, it is important to develop low-cost approaches that balance cost and effectiveness to remove heavy metals and organic contaminants from residual waters in order to enable its proper handling, either for safe waste disposal or for safe reutilization for human use. Several techniques exist to remove contaminants [ 31 ], such as filtration [ 32 , 33 ], reverse osmosis [ 34 ], precipitation [ 35 ], and adsorption [ 36 , 37 , 38 , 39 , 40 ], among others, including the use of clays [ 41 , 42 , 43 , 44 , 45 , 46 ]. The large surface-to-volume ratio of nanoscale structures has attracted a lot of attention for filtering and adsorption applications, such as heavy metal removal [ 47 , 48 , 49 , 50 ].…”