Improvement in Groundwater Resources Contaminated with Nitrate using Nano Zero Valent Iron/Nickel Particles

Document Type : Original Article

Authors

1 PhD Student, Civil Engineering Faculty, Sharif University of Technology

2 Professor, Chemical Engineering Faculty and Biotechnology Center (IBT), Sharif University of Technology

3 Professor, Civil Engineering Faculty, Sharif University of Technology

4 MSc Graduate, The Science and Research Branch, Azad University

Abstract

In this study, the in-situ application of nano zero valent Iron/Nickel particles for Nitrate removal in groundwater resources was investigated. First, nano-particles were produced and stabilized with starch. Second, it was employed in batch and continuous experiments, using transparent column and bench-scale models. Based on batch experiments, the reaction kinetics was consistent with the adsorption model by the order of 1 to 1.3. The variation of the kinetics order depends on pH and Nickel content. So that highest reactivity was observed for Iron nano particles with 3% of Nickel. Based on continuous experiments, a seepage velocity of 10 m/d yielded the maximum removal efficiency. Furthermore, Nitrate remediation in a continuous system was mostly influenced by seepage velocity, quantity and freshness of nano particles, and grain size of porous media. In the batch mode, the maximum Nitrate removal was 99% while in the continuous mode it did not exceed 70%.

Keywords

References

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Iran-Water Resources Research
Volume 10, Issue 3 - Serial Number 3
February 2015
Pages 77-87

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History

  • Receive Date: 26 May 2013
  • Accept Date: 01 July 2014

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