Fluoride Removal from Aqueous Solutions by NaOH-Modified Eucalyptus Leaves
Journal Title: Journal of Environmental Health and Sustainable Development - Year 2018, Vol 3, Issue 1
Abstract
Introduction: Fluoride (F) and its compounds are widely used in industries in which fluoride overdose leads to various detrimental diseases. In this study the effect of NaOH-modified Eucalyptus leaves on fluoride removal from aqueous solutions as a natural adsorbent was investigated. Materials and Methods: The focus of this study was on the effects of parameters such as pH (2-12), initial concentration (5-30 mg/L), adsorbent dose (0.1-1 g/L) and temperature (25-45 0C). Fluoride residual was measured using the SPADNS method by a DR 5000 spectrophotometer. Results: The maximum adsorption capacity, at pH 2 was found to be 97 mg F/g with an adsorbent dosage of 0.5 g/L and an initial fluoride concentration of 20 mg/L. The adsorption equilibrium and kinetic data were in good agreement with Langmuir Model (R2 = 0.967) with qmax = 298 mg/g and pseudo-second order reaction (R2 = 0.999). Conclusion: Based on the results, NaOH-modified eucalyptus leaves were found to be able to remove fluoride from aqueous environments with good removal efficiency and adsorption capacity.
Authors and Affiliations
Nahid Khoshnamvand, Edris Bazrafshan, Bahram Kamarei
Keywords
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