Removal of methylene blue dye from aqueous solution by semi‐interpenetrating polymer network hybrid hydrogel: Optimization through Taguchi method

Abstract

In this study, sodium humate/poly(acrylamide-comethacrylic acid)/kaolin semi-interpenetrating polymer network hybrid hydrogel was synthesized as an effective adsorbent for the removal of methylene blue. The morphological and structural properties, and swelling behavior in distilled water and various environments of hybrid hydrogel were investigated with different analyses and tests. The equilibrium swelling percent of hybrid hydrogel reached to 37,000% in 240 min. The parameters (agitation time, concentration, dose, temperature, and pH) affecting adsorption process for methylene blue were optimized using Taguchi method. The data obtained in optimum conditions were well fitted to Langmuir adsorption isotherm and maximum adsorption capacity was determined as 833. 33 mg/g. In the light of the results, the utilization of hybrid hydrogel with high swelling capacity is foreseen as a favored adsorbent in several separation processes.

Evaluation of Heterocyclic Aromatic Compound Dye (Methylene Blue) on Chitosan Adsorbent Sourced from African Snail Shell: Modelling and Optimization Studies

“…A similar trend was observed for initial concentration and temperature as shown in Figures 10a-b Within the range studied, the increase of initial concentration and that of adsorbent dosage as they interact gave a non-significant effect on the responses due to saturation of the active sites or aggregation formation resulting in high resistances caused by mass transfer against diffusion from the bulk to the surface active sites; decrease in intercellular distances; high screening effect and protection of the adsorption sites of the chitosan adsorbent. This was also corroborated by the 2D plot with the contour plot marked with parallel lines and void of curvature [56,[82][83].…”

“…The application of RSM in the design, analysis and optimization of processes in various fields of engineering, science and technology attests to its wide acceptance as a useful tool in solving problems involving several independent factors with a great deal of influence on a targeted response variable(s) [40]. The use of RSM as a modelling tool for the treatment of effluent contaminated with MB is often presented in the literature majored in three or four of the highlighted factors [2,37,38,[42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58]. Among the arrays of design associated with RSM, the central composite design (CCD) was adopted in this study to accommodate five independent process variables.…”

An efficient reusable perylene hydrogel for removing some toxic dyes from contaminated water

“…Adsorption experiments were carried out at optimum conditions applying an agitation time of 60, 15 and 90 min at pH 9.0, 5.0 and 7.0 for MB, FA and CR respectively. The concentration of these dyes on H1 and H2 adsorbent hydrogels was calculated using the following equation: 45,46 where C 0 and Ce (mg L −1 ) are the initial and equilibrium concentration of dye in the solution, V (L) is the volume of solution, w (g) is the mass of hydrogel and q e is the adsorption capacity (mg dye per g hydrogel).…”

An efficient cheap source of activated carbon as solid phases for extraction and removal of Congo Red from aqueous solutions

“…Therefore, the results obtained in the extraction experiments can be employed in favor of the removal operations of CR from its aqueous solution. The residual concentration of the solutions of the CR dye was calculated and thus the weight adsorption capacity q (mg g -1 ) was calculated based on Equation 5 [31,32].…”