loading page

Application of a Vertical “Electric Sieve” to Mitigate and Prevent Salinization in Coastal Soil
  • +1
  • Yuehua Li,
  • Lin Zhao,
  • Menglu Huang,
  • Liang Chen
Yuehua Li
Tianjin University

Corresponding Author:yuehua.li@tju.edu.cn

Author Profile
Lin Zhao
Tianjin University
Author Profile
Menglu Huang
Tianjin University
Author Profile
Liang Chen
Tianjin University
Author Profile

Abstract

This study explored the application of a Vertical Electrokinetic system (V-EK) with multilayer electrodes in shallow soil to form an “Electric Sieve” to mitigate and prevent the soil salinization caused by salts rising from shallow groundwater in the coastal areas. In the model V-EK system, the electric resistances of soil column, reversely corresponding to salinity, at the applied voltages 4, 10 and 20 V were 266, 487 and 1272 Ω, respectively. Meanwhile, lower electrical conductivity (EC, between 67-230 μs/cm) were observed in the soil within 50 cm below the surface at the voltages of 10 V and 20 V, which was much lower than the minimum value (581 μs/cm) of the control with no current applied. For the control column without EK treatment (0 V), soil in the surface layer had the highest EC value at 1721 μS/cm due to the salts rising from the bottom, and the EC values of soil beneath the surface were in the range of 581-1127 μS/cm. Compared to control column, the level of ions in the surface soil significantly declined after V-EK treatment, especially for the column with voltage at 10 V and 20V. When voltage was at 20 V, Na+ was detected at a range of 0.06-0.08mg/g in the surface soil, a >99% reduction when compared to the controls. Similar efficacy was observed for chloride (Cl-), in the V-EK column with the voltages at 10 V and 20V.
27 Sep 2021Submitted to Land Degradation & Development
28 Sep 2021Submission Checks Completed
28 Sep 2021Assigned to Editor
07 Oct 2021Reviewer(s) Assigned
01 Nov 2021Review(s) Completed, Editorial Evaluation Pending
18 Nov 2021Editorial Decision: Revise Major
13 Dec 20211st Revision Received
20 Dec 2021Submission Checks Completed
20 Dec 2021Assigned to Editor
22 Mar 2022Review(s) Completed, Editorial Evaluation Pending
29 Apr 2022Editorial Decision: Accept
30 Aug 2022Published in Land Degradation & Development volume 33 issue 14 on pages 2477-2486. 10.1002/ldr.4325