Response surface methodology for optimization of methylene blue adsorption onto carboxymethyl cellulose-based hydrogel beads: adsorption kinetics, isotherm, thermodynamics and reusability studies

Allouss, Dalia; Essamlali, Younes; Amadine, Othmane; Chakir, Ahmed; Zahouily, Mohamed

doi:10.1039/c9ra06450h

Cited by 147 publications

(78 citation statements)

References 36 publications

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“…The proposed mechanism that reported is in line with works reported by previous researchers, where adsorption mechanism could be through three different processes. 87,94 Fig. 5(a) and (b) shows that there might be physical adsorption and Fenton oxidation happen simultaneously in this study.…”

Section: Kinetic Studymentioning

confidence: 56%

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

2020

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Section: Kinetic Studymentioning

confidence: 56%

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

2020

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“…The pseudo second-order model involves the potential ad- The pseudo first-order model is the empirical kinetic equation for one-site occupancy adsorption, which simulates a rapid adsorption due to the absence of sorbate-adsorbate interaction [26]. The pseudo second-order model involves the potential adsorption procedures, such as surface adsorption, external film diffusion, and intra-particle diffusion [27]. The equation of the pseudo first-order model and the pseudo second-order model isotherm are described in Table 3.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Optimizing Adsorption of 17α-Ethinylestradiol from Water by Magnetic MXene Using Response Surface Methodology and Adsorption Kinetics, Isotherm, and Thermodynamics Studies

Huang

et al. 2021

Molecules

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Magnetic MXene composite Fe3O4@Ti3C2 was successfully prepared and employed as 17α-ethinylestradiol (EE2) adsorbent from water solution. The response surface methodology was employed to investigate the interactive effects of adsorption parameters (adsorption time, pH of the solution, initial concentration, and the adsorbent dose) and optimize these parameters for obtaining maximum adsorption efficiency of EE2. The significance of independent variables and their interactions were tested by the analysis of variance (ANOVA) and t-test statistics. Optimization of the process variables for maximum adsorption of EE2 by Fe3O4@Ti3C2 was performed using the quadratic model. The model predicted maximum adsorption of 97.08% under the optimum conditions of the independent variables (adsorption time 6.7 h, pH of the solution 6.4, initial EE2 concentration 0.98 mg L−1, and the adsorbent dose 88.9 mg L−1) was very close to the experimental value (95.34%). pH showed the highest level of significance with the percent contribution (63.86%) as compared to other factors. The interactive influences of pH and initial concentration on EE2 adsorption efficiency were significant (p < 0.05). The goodness of fit of the model was checked by the coefficient of determination (R2) between the experimental and predicted values of the response variable. The response surface methodology successfully reflects the impact of various factors and optimized the process variables for EE2 adsorption. The kinetic adsorption data for EE2 fitted well with a pseudo-second-order model, while the equilibrium data followed Langmuir isotherms. Thermodynamic analysis indicated that the adsorption was a spontaneous and endothermic process. Therefore, Fe3O4@Ti3C2 composite present the outstanding capacity to be employed in the remediation of EE2 contaminated wastewaters.

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“…Beyranvand et al 16 synthesized a graphene oxide‐cellulose nanowhisker hydrogel nanocomposite as an MB adsorbent. Allouss et al 17 synthesized a kind of composite hydrogel beads based on carboxymethyl cellulose, alginate and graphene oxide, and studied as an efficient adsorbent for MB. The maximum adsorption capacity was 45.045 mg g −1 .…”

Section: Introductionmentioning

confidence: 99%

Hydroxyethyl cellulose hydrogel modified with tannic acid as methylene blue adsorbent

Feng

Zhang

Kang

et al. 2020

J of Applied Polymer Sci

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This work developed an effective way to improve the methylene blue (MB) adsorption performance of cellulose-based hydrogel by modified with tannic acid (TA). HEC-co-p(AA-AM)/TA hydrogel was synthesized by grafting of acrylic acid (AA) and acrylamide (AM) onto hydroxyethyl cellulose (HEC), followed by modified with TA. Fourier transform infrared spectroscopy manifested that AA and AM were successfully grafted onto the hydrogel, and TA was immobilized in the hydrogel. Field emission scanning electron microscope demonstrated that the hydrogel after TA modification had a homogeneous pore structure. Brunauer-Emmett-Teller (BET) surface areas, total pore volume, and average pore diameters of the hydrogel are 11.821 m 2 g −1 , 0.0641 cm 3 g −1 , and 2.538 nm, respectively. The high swelling ratio (1179.2 g g −1 in deionized water) was in favor of the MB adsorption. The results of the adsorption experiments illustrated that HEC-cop (AA/AM) hydrogel had excellent MB adsorption performance. As the pH increases, the electrostatic attraction is enhanced, and the adsorption capacity is improved. The adsorption process was more fit with pseudo-second-order kinetics, and the maximum adsorption capacity (3438.27 mg g −1) was determined by Langmuir model. Thermodynamic studies suggested that the adsorption process is spontaneous, exothermic, and entropy reduction. X-ray photoelectron spectroscopy analysis confirmed that MB molecules were reacted with the oxygen atoms in hydroxyl and carboxyl groups by ion-exchange. High reusability demonstrated that the hydrogel could be a potential candidate for removal cationic dye from industrial effluents.

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Response surface methodology for optimization of methylene blue adsorption onto carboxymethyl cellulose-based hydrogel beads: adsorption kinetics, isotherm, thermodynamics and reusability studies

Abstract: Environment-friendly composite hydrogel beads based on carboxymethyl cellulose (CMC), alginate (Alg) and graphene oxide (GO) were synthesized by an ionotropic gelation technique and studied as an efficient adsorbent for methylene blue (MB).

Cited by 147 publications

References 36 publications

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

Optimizing Adsorption of 17α-Ethinylestradiol from Water by Magnetic MXene Using Response Surface Methodology and Adsorption Kinetics, Isotherm, and Thermodynamics Studies

Hydroxyethyl cellulose hydrogel modified with tannic acid as methylene blue adsorbent

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