Volume 3, Issue 1 (March 2018)                   J Environ Health Sustain Dev 2018, 3(1): 481-487 | Back to browse issues page

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Nutritional Health Research Center , Lorestan University of Medical Sciences, Khorramabad, Iran.
Abstract:   (558 Views)
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.
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Type of Study: Original articles | Subject: Special
Received: 2017/10/31 | Accepted: 2018/01/20 | Published: 2018/03/14