Microcrystalline Cellulose from Groundnut Shell as Potential Adsorbent of Crystal Violet and Methylene Blue. Kinetics, Isotherms and Thermodynamic Studies

Zango, Zakariyya Uba; Imam, Saifullahi Shehu

doi:10.23939/chcht14.04.563

Cited by 13 publications

(6 citation statements)

References 72 publications

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“…In this research, we aimed at synthesizing water resistant ZnO-chitosan nanocomposites for the efficient adsorption of dyes from the aqueous medium. Methylene blue was chosen as model dye due to its large consumption by textile, leather, tannery, paper, and pulp processing industries [ 28 ]. Thus, the adsorption parameters, kinetics, isotherms, regeneration, and reusability of the adsorbent materials were evaluated for optimum uptake of the dye from the aqueous medium.…”

Section: Introductionmentioning

confidence: 99%

Effective Removal of Methylene Blue from Simulated Wastewater Using ZnO-Chitosan Nanocomposites: Optimization, Kinetics, and Isotherm Studies

et al. 2022

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Successful synthesis of ZnO-chitosan nanocomposites was conducted for the removal of methylene blue from an aqueous medium. Remarkable performance of the nanocomposites was demonstrated for the effective uptake of the dye, thereby achieving 83.77, 93.78 and 97.93 mg g−1 for the chitosan, 5 wt.% ZnO-Chitosan and 10 wt.% ZnO-Chitosan, respectively. The corresponding adsorption efficiency was 88.77, 93.78 and 97.95 for the chitosan, 5 wt.% ZnO-Chitosan and 10 wt.% ZnO-Chitosan, respectively. Upon regeneration, good reusability of the nanocomposites was manifested for the continuous removal of the dye up to six consecutive cycles. The adsorption process was kinetically described by a pseudo-first order model, while the isotherms were best fitted by the Langmuir model.

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Section: Introductionmentioning

confidence: 99%

Effective Removal of Methylene Blue from Simulated Wastewater Using ZnO-Chitosan Nanocomposites: Optimization, Kinetics, and Isotherm Studies

et al. 2022

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“…To measure the pH , 1 g of each PWM and PWC was placed in 40 mL of deionized water in 200-mL flasks separately and stirred for one hour continuously. The pH was measured by using pH meter after stabilization of sample mixtures [22]. Acid-base titrations have been performed to calculate the net surface charge of adsorbent materials using the point of zero charge (pH pzc ).…”

Section: Methodsmentioning

confidence: 99%

Eco-Friendly Detoxification of Congo Red Dye from Water by Citric Acid Activated Bioadsorbents Consisting of Watermelon and Water Chestnuts Peels Collected from Indigenous Resources

Hussain

Rehman

Imran

et al. 2022

Adsorption Science & Technology

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The native peels of two cheap, locally available adsorbents, watermelon (PWM) and water chestnuts (PWC), were chemically processed with different chemicals as modifying agents for the determination and assessment of their adsorption ability for the removal and clearance of harmful, venomous, and pernicious Congo red (CGR), as an acidic nature anionic dye, from the aqueous system. In successive batch experiments, the citric acid-treated peels CPWM and CPWC have shown more promising adsorption performance than their raw and untreated peel counterparts due to the availability of additional adsorption active binding sites evidenced through FT-IR and SEM characterizations. In the Langmuir and Temkin models, the correlation coefficients ( R 2 ) for the adsorptive removal of CGR on CPWM, PWM, CPWC, and PWC are very close to unity, 0.99 for each case of adsorption performance. Furthermore, the q max nonlinear statistical results for the elimination of CGR on citric acid-treated adsorbents (CPWM and CPWC) are 8.3 and 7.95 mg/g whereas for their unmodified forms (PWM and PWC) are 2.23 and 4.32 mg/g, respectively, reflecting homogenous and monolayer adsorption mechanism. The greater values of B T 1.4 and 1.3 J/mole, for adsorptive removal of dye on CPWM and CPWC, respectively, as compared to their unmodified forms PWM and PWC which are 0.53 and 0.55 J/mole, respectively, indicate the stronger adsorbate-adsorbent associations. The mechanism follows the pseudo second order in the better mode, while thermodynamic statics for ΔH0,ΔG0, ΔS0, and ΔE0, indicate spontaneous and exothermic behavior of adsorption. This study tends to suggest that citric acid-modified adsorbents CPWM and CPWC may indeed be exploited efficiently to eliminate Congo red dye from wastewater.

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“…Figure 12 shows that removal % of MR rise steadily with rising MR concentration up to 30 ppm; after that, it begins to decrease. The reason is that initially, methyl red molecules were more readily adsorbed on available adsorbent surfaces at adsorption sites because number of adsorption sites on the NiO nanoparticles surface was greater than number of methyl red molecules [48,49]. The MR dye concentration increases further up to 30 ppm, and the removal percentage of MR dye decreases due to the lack of adsorption sites on NiO nanoparticles for further adsorption of methyl red molecules [50,51].…”

Section: Effect Of Adsorbate Concentrationmentioning

confidence: 99%

Green Synthesis of Nickel Oxide Nano particles from Lawasonia inermis leaf extract for promising Methyl red Uptake and Efficient Iodine Adsorption

Khalid,

Raza,

Areej

et al. 2024

Preprint

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Water pollution is the threat to the survival of life on mother earth but due to industrialization clean reservoirs of water deteriorated day by day which demands eco-friendly, cheap and highly efficient methods to counter this issue. So due to this pressing ultimatum nickel oxide (NiO) nanoparticles are synthesized with Lawasonia inermis as a reducing and capping agent. Green-synthesized NiO-NPs are analysed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and energy dispersive x-ray (EDX). In this study, synthesized NiO-NPs are used to remove methyl red (MR) and radioactive iodine from polluted water. The maximum adsorption efficiency of methyl red is 89% at contact time 120 minutes, pH 5.0, temperature 10 0C and adsorbent dose of 1 g. The percentage adsorption by weight of NiO nanoparticles for radioactive iodine is 225%. The adsorption capacity was calculated 4.58 mgg− 1 for methyl red at optimum conditions. Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich adsorption isotherms are studied, and the experimental data suggests that Langmuir isotherms are best fit with R2 = 0.996. According to a kinetic analysis, the pseudo 2ND order kinetic model best fits the adsorption mechanism having R2 = 0.993 A thermodynamic study shows the current process is spontaneous and endothermic, where Gibbs free energy (ΔG), enthalpy change (ΔH) and entropy change (ΔS) were − 5.9461 kjmol− 1, 33.04 kjmol− 1 and 0.00338 kjmol− 1K− 1, respectively. NiO NPs contribute to the degradation of methyl red with minimal resource utilization with promising efficiency. Additionally, in the future, it may be used for the degradation of other environmental contaminants. Graphical abstract of synthesis and application of NiO-NPs

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Microcrystalline Cellulose from Groundnut Shell as Potential Adsorbent of Crystal Violet and Methylene Blue. Kinetics, Isotherms and Thermodynamic Studies

Cited by 13 publications

References 72 publications

Effective Removal of Methylene Blue from Simulated Wastewater Using ZnO-Chitosan Nanocomposites: Optimization, Kinetics, and Isotherm Studies

Effective Removal of Methylene Blue from Simulated Wastewater Using ZnO-Chitosan Nanocomposites: Optimization, Kinetics, and Isotherm Studies

Eco-Friendly Detoxification of Congo Red Dye from Water by Citric Acid Activated Bioadsorbents Consisting of Watermelon and Water Chestnuts Peels Collected from Indigenous Resources

Green Synthesis of Nickel Oxide Nano particles from Lawasonia inermis leaf extract for promising Methyl red Uptake and Efficient Iodine Adsorption

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