Skip to main content
Log in

Effect of experimental boundary conditions and treatment-time on the electro-desalination of soils

  • Original Paper
  • Published:
Environmental Geochemistry and Health Aims and scope Submit manuscript

Abstract

This study investigates the effect of boundary conditions and treatment-time on the electro-desalination of artificially-contaminated soil. The effect of ion exchange membranes (IEM), calcium chloride (CaCl2), and ethylenediaminetetraacetic acid (EDTA) on the removal of salt (i.e., Na+, Cl, and Ca2+) and metal (i.e., Co2+ and Fe2+) ions from the soil by electrokinetic (EK) was studied. The outcomes demonstrate that an increase in treatment-time decreases the electroosmosis and ion removal rate, which might be attributed to the formation of acid–base fronts in soil, except in the IEM case. Because a high pH jump and electroosmotic flow (EOF) of water were not observed within the soil specimen due to the IEM, the removal of ions was only by diffusion and electromigration. The collision of acid–base fronts produced a large voltage gradient in a narrow soil region with a reduced electric field (EF) in its remaining parts, causing a decrease in EOF and ion transport by electromigration. The results showed that higher electroosmosis was observed by using CaCl2 and EDTA; thus, the removal rate of Co2+, Na+, and Ca2+ was greater than Clˉ due to higher EOF. However, for relatively low EOF, the removal of Clˉ exceeded that of Co2+, Na+, and Ca2+, possibly due to a lack of EOF. In addition, the adsorption of Fe2+ in soil increased with treatment-time due to the corrosion of the anode during all EK experiments except in the case of IEM, where an anion exchange membrane (AEM) was introduced at the anode–soil interface.

Graphical abstract

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

Data availability

All data that support the findings of this study are included within the article (and any supplementary files).

References

Download references

Acknowledgements

We are grateful to the University of Agriculture Faisalabad, Punjab Pakistan, for lab space and instrumentation as well as we are also grateful for funding by the Researchers Supporting Project Number (RSPD2023R766) King Saud University, Riyadh, Saudi Arabia.

Funding

Authors did not receive any direct funding for this study.

Author information

Authors and Affiliations

Authors

Contributions

AAH: Methodology, data curation, writing and conceptualization. KK: Conceptualization. MI: Data curation, Software. AA: Validation, Writing-review and editing. LL: Conceptualization. MH: Visualization, Investigation. MYN: Software, Validation. MSM: Review and Editing. AM: Resources, Validation. AAAM: Review. All authors have read and agreed to publish the manuscript.

Corresponding authors

Correspondence to Abdul Ahad Hussain, Kashif Kamran or Lin Li.

Ethics declarations

Conflict of interest

The authors declared no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Hussain, A.A., Kamran, K., Imran, M. et al. Effect of experimental boundary conditions and treatment-time on the electro-desalination of soils. Environ Geochem Health 46, 63 (2024). https://doi.org/10.1007/s10653-023-01830-2

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s10653-023-01830-2

Keywords

Navigation