Evaluation of mesoporous bioactive glass (MBG) as adsorbent for removal of methylene blue (MB) from aqueous solution

Li, Liying; Chen, Lu; Shi, Huanrui; Chen, Xi; Lin, Weijian

doi:10.1016/j.jece.2016.01.039

Cited by 13 publications

(1 citation statement)

References 41 publications

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“…Due, it was conventional a strong electrostatic attraction of MB with the Cu (OH) 2 -NWs-PVA-AC covering and needs higher energy to remove the dye in the chemical regeneration method. Further, the dye desorption efficiency was found to be increased as compared to the other desorbing solvents, because of the dye molecule easily dissolved in the EtOH solvent 56 , 57 . After EtOH followed by HCl showing the second-highest percentage desorption amount.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of Cu(OH)2-NWs-PVA-AC Nano-composite and its use as an efficient adsorbent for removal of methylene blue

Lakkaboyana

Soontarapa

Asmel

et al. 2021

Sci Rep

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The present study focused on the synthesis of copper hydroxide nanowires decorated on activated carbon (Cu(OH)2-NWs-PVA-AC). The obtained Cu(OH)2-NWs-PVA-AC Nano-composite was distinguished by XRD, SEM, EDX, BET, FTIR and XPS respectively. Besides, different variables such as solution pH, and initial dye concentration, contact time, and temperature were performed on the adsorption efficiency of MB in a small batch reactor. Further, the experimental results are analyzed by various kinetic models via PFO, PSO, intra-particle diffusion and Elovich models, and the results revealed that among the kinetic models, PSO shows more suitability. In addition, different adsorption isotherms were applied to the obtained experimental data and found that Langmuir–Freundlich and Langmuir isotherm were best fits with the maximum adsorption capacity of 139.9 and 107.6 mg/g, respectively. The Nano-composite has outstanding MB removal efficiency of 94–98.5% with a span of 10 min. and decent adsorption of about 98.5% at a pH of 10. Thermodynamic constants like Gibbs free energy, entropy, and enthalpy were analyzed from the temperature reliance. The results reveal the adsorption processes are spontaneous and exothermic in nature. The high negative value of ΔG° (− 44.11 to − 48.86 kJ/mol) and a low negative value of ΔH° (− 28.96 kJ/mol) show the feasibility and exothermic nature of the adsorption process. The synthesized dye was found to be an efficient adsorbent for the potential removal of cationic dye (methylene blue) from wastewater within a short time.

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Section: Resultsmentioning

confidence: 99%