Complex resistivity spectrum of pollutant soils with low-concentration heavy metals

Xuesong Xie; Diquan Li; Jiabin Yan; Jing Pei; Weitian Wu; Zhongyuan Liu; Xiaolin Ding

Heliyon (Oct 2023)

Complex resistivity spectrum of pollutant soils with low-concentration heavy metals

Xuesong Xie,
Diquan Li,
Jiabin Yan,
Jing Pei,
Weitian Wu,
Zhongyuan Liu,
Xiaolin Ding

Affiliations

Xuesong Xie: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring in Central South University, Ministry of Education, Changsha, 410083, China; Key Laboratory of Non-ferrous and Geological Hazard Detection, Changsha, 410083, China; School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China
Diquan Li: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring in Central South University, Ministry of Education, Changsha, 410083, China; Key Laboratory of Non-ferrous and Geological Hazard Detection, Changsha, 410083, China; School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China; Corresponding author. School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China.
Jiabin Yan: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring in Central South University, Ministry of Education, Changsha, 410083, China; Key Laboratory of Non-ferrous and Geological Hazard Detection, Changsha, 410083, China; School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China
Jing Pei: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring in Central South University, Ministry of Education, Changsha, 410083, China; Key Laboratory of Non-ferrous and Geological Hazard Detection, Changsha, 410083, China; School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China
Weitian Wu: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring in Central South University, Ministry of Education, Changsha, 410083, China; Key Laboratory of Non-ferrous and Geological Hazard Detection, Changsha, 410083, China; School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China
Zhongyuan Liu: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring in Central South University, Ministry of Education, Changsha, 410083, China; Key Laboratory of Non-ferrous and Geological Hazard Detection, Changsha, 410083, China; School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China
Xiaolin Ding: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring in Central South University, Ministry of Education, Changsha, 410083, China; Key Laboratory of Non-ferrous and Geological Hazard Detection, Changsha, 410083, China; School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China

Journal volume & issue: Vol. 9, no. 10
p. e20541

Abstract

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Soil contamination by heavy metals occurs globally, with varying degrees of severity, especially in agricultural fields. Investigating the frequency response characteristics of different types of heavy metal pollutants through induced polarization can provide valuable evidence for surveys based on this method. Soil specimens with varying low concentrations of copper (Cu), chromium (Cr), cadmium (Cd), and lead (Pb) heavy metals were prepared for this study, and parameters including complex resistivity, amplitude-frequency, and resistivity phase were measured. Our findings reveal the following trends: Complex resistivity decreases as heavy metal concentrations increase, demonstrating significant shifts within lower concentration ranges but presenting limitations for assessing pollution in high-concentration areas. Conversely, amplitude-frequency increases with higher heavy metal concentrations, displaying excellent performance in high-concentration scenarios. The differences in complex resistivity and amplitude-frequency among different types of heavy metal pollutants are distinct. In contrast, the absolute phase decreases with rising heavy metal concentrations. The resistivity phase spectra for various heavy metal pollutants exhibit unique patterns. For example, copper-contaminated soil exhibits phase peaks in the frequency range of 8–32 Hz, whereas chromium-contaminated soil shows phase peaks at 16–64 Hz. Cadmium-contaminated soil displays phase peaks ranging from 0.25 Hz to 2 Hz, while lead-contaminated soil exhibits phase peaks within the 0.5 Hz–4 Hz range. Leveraging the frequency range corresponding to phase peaks as an identification method for heavy metal pollution types proves effective. The frequency response characteristics of induced polarization vary significantly among different types and concentrations of heavy metal pollutants, providing important foundations for the application of induced polarization method in the field of heavy metal pollution detection.

Published in Heliyon

ISSN: 2405-8440 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Science: Science (General); Social Sciences: Social sciences (General)
Website: https://www.cell.com/heliyon/home

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