Determination of dielectric properties of lead-contaminated soils: Potential application to soil remediation
Samroeng Santalunai,
Jariya Pakprom,
Weerawat Charoensiri,
Chanchai Thongsopa,
Thanaset Thosdeekoraphat,
Pisit Janpangngern,
Teerapon Yodrot,
Nuchanart Santalunai,
Samran Santalunai
Affiliations
Samroeng Santalunai
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
Jariya Pakprom
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
Weerawat Charoensiri
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
Chanchai Thongsopa
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
Thanaset Thosdeekoraphat
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
Pisit Janpangngern
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
Teerapon Yodrot
Department of Electrical Engineering Technology, Faculty of Industry and Technology, Rajamangala University of Technology Rattanakosin, wang klai kangwon campus, 77110, Prachuap Khiri Khan, Thailand
Nuchanart Santalunai
Department of Telecommunication Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, 30000, Nakhon Ratchasima, Thailand; Corresponding authors.
Samran Santalunai
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand; Corresponding authors.
This research investigated the effectiveness of radio frequency (RF) heating as a treatment for lead-contaminated soil, assessing its impact through dielectric constant measurements. Using water-soluble lead (II) acetate trihydrate, the study analyzed the impact of RF heating on soil dielectric properties under various soil moisture conditions (high, medium, and low) and electric field strengths (112.5, 150, 225, and 450 kV/m). The results indicated that soil temperature increased with lead concentration, highlighting significant changes in soil thermodynamics. Under high-humidity conditions, temperature increases were more pronounced, suggesting that higher lead concentrations elevate soil temperatures. Moreover, RF heating consistently reduced the dielectric constant as lead concentration increased, which was especially evident at higher electric field strengths. The study found that the soil resistivity approached that of uncontaminated soil, particularly at 450 kV/m electric field strength, with the highest removal rate of 46.154%. This investigation provides valuable insights into the application of RF heating for soil quality improvement in lead-contaminated environments, demonstrating how dielectric properties can reflect those of uncontaminated soil.
