4.3 Article

Dynamic adsorption of toxic indigo carmine dye on bio-inspired synthesised Fe3O4 nanoparticles: kinetic and thermodynamic study

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TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2020.1734197

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Bengal gram bean (Cicer arietinum L; ) extract; bio-inspired magnetic Fe3O4; adsorption; indigo carmine dye; Freundlich isotherm

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  1. Human Resources Development [20194030202470]

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The bio-inspired synthesis of Fe3O4 nanoparticles using Bengal gram bean extract for enhanced adsorption of toxic indigo carmine dye is reported. The synthesized adsorbent shows a high surface area and pore volume, exhibiting efficient adsorption of the dye.
The bio-inspired synthesis of Fe3O4 nanoparticles using a common kitchen waste, Bengal gram bean (Cicer arietinum L.) extract (BGBE) for enhanced adsorption of toxic indigo carmine dye is reported. Synthesised adsorbent was characterised by FTIR, FE-SEM, XRD, BET and XPS to understand its meticulous properties. The Fe3O4 adsorbent shows fascinating surface area of 78.61 m(2) g(-1) with a pore volume of 0.25 cc g(-1) at P/P-0 = 0.98 and displayed nanograin like morphology. The efficiency towards adsorption of toxic IC dye was found up to 99.71 +/- 0.35% within 40 min at pH 7 with 0.25 g of Fe3O4 nanomaterials having the 299 +/- 2 K surrounding temperature. The Langmuir monolayer adsorption capacity was found to 393.7 mg g(-1) at the stroke speed 150 rpm. The experimental data follows the Freundlich adsorption isotherm. Kinetically the uptake rate of IC dye follows pseudo-second-order kinetic model. The thermodynamic study reveals that IC dye adsorption process is spontaneous and endothermic in nature.

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