Kinetics and Mechanism of Fluoride Removal Using Laterite

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• 作者：Mitali Sarkar ; Aparna Banerjee ; Partha Pratim Pramanick
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2006
• 出版时间：August 16, 2006
• 年：2006
• 卷：45
• 期：17
• 页码：5920 - 5927
• 全文大小：393K
• 年卷期：v.45,no.17(August 16, 2006)
• ISSN：1520-5045

文摘

The suitability of laterite soil particle as a potential adsorbent is assessed for the removal of fluoride followingbatch mode of operation. The efficiency of the operation is determined by initial fluoride concentration,shaking time, shaking speed, dose and particle size of the adsorbent, pH of the solution, and temperature.The process attains equilibrium at 195 min, removing 78.2% fluoride from 10 mg dm^-3 fluoride solutionusing fine particle size at 303 K. Thermodynamic parameters revealed that the process is spontaneous andexothermic in nature. The isotherm can be conformed to either Langmuir or Freundlich model in differenttemperature regions. The process follows Lagergren pseudo-first-order rate, and surface diffusion is identifiedas the predominating mechanism.