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Volume 15, Issue 10 (March 2013)                   J Arak Uni Med Sci 2013, 15(10): 67-76 | Back to browse issues page

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Karimi B, Rajaei M, Ganadzadeh M J, Mashayekhi M, Jahanbakhsh M. Evaluation of nitrate removal from water by Fe/H2O2 and adsorption on activated carbon. J Arak Uni Med Sci. 2013; 15 (10) :67-76
URL: http://jams.arakmu.ac.ir/article-1-1842-en.html
1- Arak University of Medical Sciences , karimibehroz@yahoo.com
2- Arak University of Medical Sciences
Abstract:   (8434 Views)
Background: The presence of nitrate in drinking water causes various health and environmental problems. The aim of this study was to evaluate the efficacy of nitrate reduction by Fe/H2O2 process and adsorption on activated carbon. Materials and Methods: This experimental study investigated nitrate oxidation by advanced oxidation process of Fe°/FeІІ/FeШ/H2O2 at pH 2-10, nitrate concentrations of 50-300 mg/L. After adjusting the pH, 0.5, 1, 2, 5, and 10 g/L values of GAC, PAC, H2O2/GAC, and Fe/H2O2/GAC together with H2O2 at retention times of 15, 30, 45, 60, and 90 minutes, respectively, were added and mixed. Results: At retention time of 10 minutes and 0.5 mL H2O2 and 1 g/L from Fe°, FeІІ, and FeІІІ, the removal efficacy was 88.5, 84 and 78%, respectively. At 50 mg/L nitrate and 0.5, 1, and 10 mg/L GAC concentrations, the removal efficacy was 56.5, 93.6, and 82.6%, respectively. The nitrate removal efficiency at pH=4 was approximately 50%, whereas at pH=3 with 30% efficacy, it increased to 80%. Conclusion: Modified Fe/H2O2 process with iron nano-particles and activated carbon adsorption can effectively reduce nitrate under optimal conditions. The use of activated carbon at a concentration of 1 g/L increased the removal efficiency of nitrate to 90%.
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Type of Study: Original Atricle | Subject: Health
Received: 2012/07/17 | Accepted: 2012/09/20

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