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- Title
Facile removal of emerging pollutants using mesoporous TiO<sub>2</sub> nanoparticles synthesized via xanthan gum templated greener protocol.
- Authors
Kaur, A.; Sud, D.
- Abstract
Adsorption technique has emerged as one of the promising protocols to mitigate the level of emerging contaminants from aqueous media owing to high viability, flexibility and productive recovery of adsorbent. The suitability of template induced mesoporous TiO2 nanoparticles having high surface area to expel out triclosan and chlorpyrifos from aqueous media was investigated in the present study. Biopolymer, xanthan gum templated synthesis of nanosized TiO2 was carried out imposing high frequency sound waves, and the as-synthesized sample was calcined at different temperatures (550–850 °C). The morphological features, crystal phase and size, pore size and surface area, and band gap of TiO2 nanoparticles were evaluated. XRD analysis divulged the 100% pure anatase phase of TiO2 even at 850 °C. Prior to adsorption studies, the persistence studies of triclosan and chlorpyrifos (day 1 to 75) have been carried out which showed the highly persistent nature of both the adsorbates. The nanosorbent anatase TiO2 having 87 m2g−1 surface area and 6.2 nm pore radius showed instant adsorption of triclosan (96%) and chlorpyrifos (89%) optimal conditions. Thermodynamic and adsorption isotherm studies were conducted at different temperatures (293–303 K) and initial concentrations (3–15 mg/L). The calculated thermodynamic parameters ΔG, ΔH and ΔS suggested that the adsorption is spontaneous and endothermic in nature. Further, the recyclability studies demonstrate that mesoporous TiO2 retains the adsorption efficiency for both the adsorbates even after 7 consecutive adsorption–desorption cycles. The findings of the present work have substantial implications for facile elimination of triclosan and chlorpyrifos from aqueous medium with mesoporous TiO2 nanostructures.
- Subjects
EMERGING contaminants; XANTHAN gum; TRICLOSAN; ADSORPTION isotherms; WASTE recycling; SOUND waves; BAND gaps
- Publication
International Journal of Environmental Science & Technology (IJEST), 2024, Vol 21, Issue 5, p5127
- ISSN
1735-1472
- Publication type
Article
- DOI
10.1007/s13762-023-05358-x