A Comparison Study of Removing Rhodamine B from Wastewater by Nitric Acid Functionalized Rice Husk, Coconut Husk and Synthetic Porous Carbon

Thambiliyagodage, Charitha; Ranchagoda, Sulakshini; Mirihana, Shanitha

doi:10.1007/978-981-16-4412-2_46

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…6 Hence, it is vital to remove dyes from water reservoirs. There are many methods available for such purposes including membrane filtration, 7 nanofiltration, 8 adsorption, 9 remediation by micro-organisms, 10 ion exchange, 10 ozonation, 11 photooxidation, 12−14 chemical reduction, 15 etc. These methods possess disadvantages such as sludge production, use of expensive chemicals, poor efficiency, short half-life, formation of byproducts, regeneration difficulties, 16 etc.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H₃PO₄

Liyanaarachchi

Thambiliyagodage

Lokuge³

et al. 2023

ACS Omega

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Hierarchically porous nitrogen-enriched carbon materials synthesized by polymerization of sucrose and urea (SU) were activated by KOH and H 3 PO 4 (SU-KOH and SU-H 3 PO 4 , respectively). Characterization was undertaken and the synthesized materials were tested for their ability to adsorb methylene blue (MB). Scanning electron microscopic images along with the Brunauer–Emmett–Teller (BET) surface area analysis revealed the presence of a hierarchically porous system. X-ray photoelectron spectroscopy (XPS) confirms the surface oxidation of SU upon activation with KOH and H 3 PO 4 . The best conditions for removing dyes utilizing both activated adsorbents were determined by varying the pH, contact time, adsorbent dosage, and dye concentration. Adsorption kinetics were evaluated, and the adsorption of MB followed second-order kinetics, suggesting the chemisorption of MB to both SU-KOH and SU-H 3 PO 4 . Times taken to reach the equilibrium by SU-KOH and SU-H 3 PO 4 were 180 and 30 min, respectively. The adsorption isotherm data were fitted to the Langmuir, Freundlich, Temkin, and Dubinin models. Data were best described by the Temkin isotherm model for SU-KOH and the Freundlich isotherm model for SU-H 3 PO 4 . Thermodynamics of the adsorption of MB to the adsorbent was determined by varying the temperature in the range of 25–55 °C. Adsorption of MB increased with increasing temperature, suggesting that the adsorption process is endothermic. The highest adsorption capacities of SU-KOH and SU-H 3 PO 4 (1268 and 897 mg g –1 , respectively) were obtained at 55 °C. Synthesized adsorbents were effective in removing MB for five cycles with some loss in activity. The results of this study show that SU activated by KOH and H 3 PO 4 are environmentally benign, favorable, and effective adsorbents for MB adsorption.

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Section: Introductionmentioning

confidence: 99%

Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H₃PO₄

Liyanaarachchi

Thambiliyagodage

Lokuge³

et al. 2023

ACS Omega

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“…Additionally, with the release of dyes, other chemicals such as heavy metals, chlorinated compounds, surfactants, and salts are discharged . For this reason, it is important to remove dyes from water reservoirs, and for such purposes, different methods including adsorption, − membrane filtration, ion exchange, coagulation, and advanced oxidation process ,, are available.…”

Section: Introductionmentioning

confidence: 99%

Efficient Visible-Light Photocatalysis and Antibacterial Activity of TiO₂-Fe₃C-Fe-Fe₃O₄/Graphitic Carbon Composites Fabricated by Catalytic Graphitization of Sucrose Using Natural Ilmenite

et al. 2022

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Dyes in wastewater are a serious problem that needs to be resolved. Adsorption coupled photocatalysis is an innovative technique used to remove dyes from contaminated water. Novel composites of TiO 2 -Fe 3 C-Fe-Fe 3 O 4 dispersed on graphitic carbon were fabricated using natural ilmenite sand as the source of iron and titanium, and sucrose as the carbon source, which were available at no cost. Synthesized composites were characterized by X-ray diffractometry (XRD), Raman spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence spectroscopy (XRF), and diffuse reflectance UV–visible spectroscopy (DRS). Arrangement of nanoribbons of graphitic carbon with respect to the nanomaterials was observed in TEM images, revealing the occurrence of catalytic graphitization. Variations in the intensity ratio ( I D / I G ), L a and L D , calculated from data obtained from Raman spectroscopy suggested that the level of graphitization increased with an increased loading of the catalysts. SEM images show the immobilization of nanoplate microballs and nanoparticles on the graphitic carbon matrix. The catalyst surface consists of Fe 3+ and Ti 4+ as the metal species, with V, Mn, and Zr being the main impurities. According to DRS spectra, the synthesized composites absorb light in the visible region efficiently. Fabricated composites effectively adsorb methylene blue via π–π interactions, with the absorption capacities ranging from 21.18 to 45.87 mg/g. They were effective in photodegrading methylene blue under sunlight, where the rate constants varied in the 0.003–0.007 min –1 range. Photogenerated electrons produced by photocatalysts captured by graphitic carbon produce O 2 •– radicals, while holes generate OH • radicals, which effectively degrade methylene blue molecules. TiO 2 -Fe 3 C-Fe-Fe 3 O 4 /graphitic carbon composites inhibited the growth of Escherichia coli (69%) and Staphylococcus aureus (92%) under visible light. Synthesized novel composites using natural materials comprise an ecofriendly, cost-effective solution to remove dyes, and they were effective in inhibiting the growth of Gram-negative and Gram-positive bacteria.

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Effect of Co-pollutants on the Photocatalytic Activity of Fe doped ZnO Nanoparticles on the Degradation of Methylene Blue

Thambiliyagodage

Lokuge²

2022

2022 IEEE International Conference on Nanoelectronics, Nanophotonics, Nanomaterials, Nanobioscience &Amp; Nanotechnology (5NANO

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A Comparison Study of Removing Rhodamine B from Wastewater by Nitric Acid Functionalized Rice Husk, Coconut Husk and Synthetic Porous Carbon

Cited by 3 publications

References 43 publications

Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H₃PO₄

Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H₃PO₄

Efficient Visible-Light Photocatalysis and Antibacterial Activity of TiO₂-Fe₃C-Fe-Fe₃O₄/Graphitic Carbon Composites Fabricated by Catalytic Graphitization of Sucrose Using Natural Ilmenite

Effect of Co-pollutants on the Photocatalytic Activity of Fe doped ZnO Nanoparticles on the Degradation of Methylene Blue

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A Comparison Study of Removing Rhodamine B from Wastewater by Nitric Acid Functionalized Rice Husk, Coconut Husk and Synthetic Porous Carbon

Cited by 3 publications

References 43 publications

Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H3PO4

Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H3PO4

Efficient Visible-Light Photocatalysis and Antibacterial Activity of TiO2-Fe3C-Fe-Fe3O4/Graphitic Carbon Composites Fabricated by Catalytic Graphitization of Sucrose Using Natural Ilmenite

Effect of Co-pollutants on the Photocatalytic Activity of Fe doped ZnO Nanoparticles on the Degradation of Methylene Blue

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Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H₃PO₄

Kinetics and Thermodynamics Study of Methylene Blue Adsorption to Sucrose- and Urea-Derived Nitrogen-Enriched, Hierarchically Porous Carbon Activated by KOH and H₃PO₄

Efficient Visible-Light Photocatalysis and Antibacterial Activity of TiO₂-Fe₃C-Fe-Fe₃O₄/Graphitic Carbon Composites Fabricated by Catalytic Graphitization of Sucrose Using Natural Ilmenite