Electrochemical remediation of nitrate-contaminated sandy soil

W. E. Elshorbagy, N. M. Eid, D. Larson, D. Slack

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Migration of nitrate to ground water has become a serious threat in many agricultural areas. This paper presents the results of experimental laboratory tests studying the nitrate gradient developed in response to an electrical potential. Two systems were tested; the first had no flow (closed system) and the second had flow opposite to the direction of the electrical current. A solution of sodium nitrate in sandy soil was used in both systems. The tests showed that the electrokinetic process effectively concentrated and retained nitrate close to the anode. The movement of NO3- through the soil column was significantly influenced by the development of a pH gradient. Statistical analysis was performed to determine best-fit equations relating the nitrate gradient to the electrical input and pH gradient. A simple one-dimensional finite difference model was used to predict the pH gradient developed during the electrokinetic process. The experimental measurements closely agreed with the predicted spatial and temporal distribution of the nitrate gradient for both closed and open system configurations.

Original languageEnglish (US)
Title of host publicationGeoengineering in arid lands. Developments in arid regions research 1.
EditorsA.M.O. Mohamed, K.I. Hosani
Pages625-631
Number of pages7
StatePublished - Dec 1 2000
Externally publishedYes
Event40th Interscience Conference on Antimicrobial Agents and Chemotherapy -
Duration: Sep 17 2000Sep 20 2000

Publication series

NameGeoengineering in arid lands. Developments in arid regions research 1.

Other

Other40th Interscience Conference on Antimicrobial Agents and Chemotherapy
Period9/17/009/20/00

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

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  • Cite this

    Elshorbagy, W. E., Eid, N. M., Larson, D., & Slack, D. (2000). Electrochemical remediation of nitrate-contaminated sandy soil. In A. M. O. Mohamed, & K. I. Hosani (Eds.), Geoengineering in arid lands. Developments in arid regions research 1. (pp. 625-631). (Geoengineering in arid lands. Developments in arid regions research 1.).