Volume 1, Number 3 (Jan-Marc 2013)                   JCHR 2013, 1(3): 134-143 | Back to browse issues page

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Ghaneian M T, Ehrampoush M H, Jasemizad T, Kheirkha M, Amraei R, Sahlabadi F. The Effect of Nitrate as a Radical Scavenger for the Removal of Humic Acid from Aqueous Solutions by Electron Beam Irradiation . JCHR. 2013; 1 (3) :134-143
URL: http://jhr.ssu.ac.ir/article-1-68-en.html

1- Ph.D.
2- M.Sc. , taherehjasemizad@yahoo.com
3- M.Sc.
Abstract:   (8710 Views)
Introduction: Humic acids have adverse effects on the water quality, then should be removed from water resources. The aim of this study was to evaluate the effect of nitrate as a radical scavenger for removal of humic acid from aqueous solutions by electron beam irradiation. Materials and Methods: In this study, after preparation of stock humic acid solution in alkaline condition, different concentrations of humic acid (10, 25 and 50 mg/l) were prepared. Different concentrations of nitrate (25, 50 and 100 mg/l) added to humic acid samples and then absorption of samples was measured at 254 nm by using UV-Vis spectrophotometer before and after the electron beam irradiation. This study has done at pH= 8 and at different electron beam adsorbed dose of 1, 3, 6, 9 and 15 kGy. Results: The results of this study showed that the increasing of adsorbed dose from 1 to 15 kGy, the removal efficiency of humic acid also increased. By increasing of nitrate concentration from 25 to 100 mg/l, the removal efficiency of humic acid has decreased from 43.8% to 36.6% and nitrate acts as a radical scavenger. By increasing of humic acid concentration from 10 to 50mg/l, removal efficiency decreased in all adsorbed doses. Kinetic analysis of our results showed that the results well fitted with the second - order reaction. Conclusion: We can conclude from this study that electron beam irradiation could be a useful process for the treatment of natural organic matter (humic acid) from surface waters.
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Review: Research |
Received: 2013/04/29 | Accepted: 2015/06/2 | Published: 2015/06/2

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