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Decolorization of Congo Red Using Synthesized Titanate Nanotubes (TNTs)
Congo red (CR, λmax = 497 nm, C32H22N6Na2O6S2) removal efficiency from aqueous media was evaluated on synthesized titanate nanotubes (TNTs). TNTs were synthesized hydrothermally and characterized by SEM/EDX and XRD. The as-prepared TNTs were applied on Congo red to adsorb and/or photodegrade. Adsorption, in the absence of light, followed by photodegradation using UV irradiation (UV-C, 360 nm) was conducted. The results of the adsorption experiments suggested that a dose of 4 g/L TNTs could adsorb ~86% CR with a shaking speed of 520–540 rpm within 45 min at room temperature and pH ~6.8 ± 0.2 (pH of de-ionized water), when the initial CR concentration was kept at 6 mg/L. Under the same experimental conditions, the UV light was allowed to irradiate the same experimental suspension for another 5 h to achieve the maximum CR removal efficiency ~98%. The adsorptive behavior of TNTs was evaluated using Langmuir isotherm and was found to be 12.04 mg/g. The feasibility of adsorption was understood by D–R isotherm. Adsorption is followed Langmuir and Freundlich isotherms in a close proximity. Positive free energy change value, ΔG0, suggests the process to be non-spontaneous and RL (dimensionless equilibrium parameter) value implies the favorability of adsorption process.
Decolorization of Congo Red Using Synthesized Titanate Nanotubes (TNTs)
Congo red (CR, λmax = 497 nm, C32H22N6Na2O6S2) removal efficiency from aqueous media was evaluated on synthesized titanate nanotubes (TNTs). TNTs were synthesized hydrothermally and characterized by SEM/EDX and XRD. The as-prepared TNTs were applied on Congo red to adsorb and/or photodegrade. Adsorption, in the absence of light, followed by photodegradation using UV irradiation (UV-C, 360 nm) was conducted. The results of the adsorption experiments suggested that a dose of 4 g/L TNTs could adsorb ~86% CR with a shaking speed of 520–540 rpm within 45 min at room temperature and pH ~6.8 ± 0.2 (pH of de-ionized water), when the initial CR concentration was kept at 6 mg/L. Under the same experimental conditions, the UV light was allowed to irradiate the same experimental suspension for another 5 h to achieve the maximum CR removal efficiency ~98%. The adsorptive behavior of TNTs was evaluated using Langmuir isotherm and was found to be 12.04 mg/g. The feasibility of adsorption was understood by D–R isotherm. Adsorption is followed Langmuir and Freundlich isotherms in a close proximity. Positive free energy change value, ΔG0, suggests the process to be non-spontaneous and RL (dimensionless equilibrium parameter) value implies the favorability of adsorption process.
Decolorization of Congo Red Using Synthesized Titanate Nanotubes (TNTs)
Lecture Notes in Civil Engineering
Das, Bibhuti Bhusan (editor) / Barbhuiya, Salim (editor) / Gupta, Rishi (editor) / Saha, Purnachandra (editor) / Mohanty, Saismrutiranjan (author) / Moulick, Sanjib (author) / Maji, Sanjoy (author)
2020-07-03
11 pages
Article/Chapter (Book)
Electronic Resource
English
Titanate nanotubes , Congo red , Adsorption/photodegradation , Isotherms Engineering , Building Construction and Design , Geoengineering, Foundations, Hydraulics , Sustainable Architecture/Green Buildings , Building Materials , Construction Management , Transportation Technology and Traffic Engineering
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| British Library Online Contents | 2016
Enhanced catalytic performance of Pt/TNTs composite electrode by reductive doping of TNTs
| British Library Online Contents | 2016
Enhanced catalytic performance of Pt/TNTs composite electrode by reductive doping of TNTs
| British Library Online Contents | 2016