Green Synthesis of Iron Nano-Impregnated Adsorbent for Fast Removal of Fluoride from Water
作者： Imran Ali , Zeid A. ALOthman , Mohd Marsin Sanagi
DOI: 10.1016/J.MOLLIQ.2015.07.034
关键词: Nanocomposite 、 Adsorption 、 Nano- 、 Exothermic reaction 、 Fluoride 、 Chemistry 、 Water treatment 、 Inorganic chemistry 、 Langmuir 、 Freundlich equation
摘要: Abstract Iron nano-impregnated adsorbent was synthesized, characterized and applied for fluoride subtraction from the water. Maximum removal (90%) at 4.0 mg/L concentration, 25.0 min. contact time, 7.0 pH, 2.5 g/L dose 293 K temperature. nanocomposite selective removal. The experimental data obeyed Langmuir, Freundlich Temkin models. values ΔG° were − 1.89, − 0.86 − 0.74 kJ/mol 293, 298 303 K temperatures. ΔH° value − 7.61 kJ/mol; indicating exothermic adsorption. ΔS° − 2.30 x 10 − 2 kJ/mol K; a signal of entropy decrease during adsorption process in order 293 > 298 > 303 K. Kinetic modeling confirmed pseudo-first-order liquid film diffusion mechanisms. mechanism is also determined.
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