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Application of Artificial Neural Network (ANN) for Modelling Chromium(VI) removal using Iron Oxide Nanoparticles

Document Type : Research Paper

Authors

  • Elham Asrari 1

  • Vahide Khosravi 2

  1. 1 Associate Prof., Department of Engineering, Faculty of Civil Engineering, Payam-e-Noor University, Shiraz, Iran
  2. 2 M.Sc. Department of Civil Engineering (Environment), Faculty of Civil Engineering, Payam-e-Noor University, Shiraz, Iran

Abstract

 Nowadays, one of the most important environmental pollution is heavy metals industrial wastewater. Among the various types of heavy metals, chromium is one of the hazardous and toxic environmental pollutants. In order to prevent damage caused by chromium, it seems essential to prevent its entrance to the environment. The purpose of this study was modelling chromium removal using iron oxide nanoparticles through artificial neural network model for estimating the best removal Cr(VI) model. The optimum conditions (more than 90% removal efficiency) achieved were at pH=3, initial concentration of Cr = 10 mg/L; dosage of Fe2O3 = 1 g/L; contact time = 60 minutes, and temperature =25 . After backpropagation (BP) training, the ANN model was able to predict adsorption efficiency with a tangent sigmoid transfer function (Tansig) at hidden layer with 11 neurons and a linear transfer function (Purelin) at out layer. The Levenberg-Marquardt algorithm (LMA) was applied, giving a minimum mean squared error (MSE) for training and cross validation at the ninth place of decimal. The high correlation coefficient (R2ANN = 0.996) between the model and its closeness to the experimental coefficient (R2Exp = 0.998) showed that the model is able to predict the removal of Cr(VI) from aqueous solutions by iron oxide nanoparticles.

Keywords

Subjects

 Environmental Health

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Environment and Water Engineering

Volume 3, Issue 1
March 2017

Pages 30 - 39

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History
  • Receive Date: 28 March 2016
  • Revise Date: 10 June 2016
  • Accept Date: 19 December 2016
  • Publish Date: 21 March 2017
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