Santalunai Samroeng, Pakprom Jariya, Charoensiri Weerawat, Thongsopa Chanchai, Thosdeekoraphat Thanaset, Janpangngern Pisit, Yodrot Teerapon, Santalunai Nuchanart, Santalunai Samran
School of Electronic Engineering, Institute of Engineering, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand.
Department of Electrical Engineering Technology, Faculty of Industry and Technology, Rajamangala University of Technology Rattanakosin, wang klai kangwon campus, 77110, Prachuap Khiri Khan, Thailand.
Heliyon. 2024 Aug 10;10(16):e35787. doi: 10.1016/j.heliyon.2024.e35787. eCollection 2024 Aug 30.
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.
本研究调查了射频（RF）加热作为处理铅污染土壤的有效性，通过介电常数测量评估其影响。该研究使用三水合乙酸铅（II），分析了射频加热在不同土壤湿度条件（高、中、低）和电场强度（112.5、150、225和450 kV/m）下对土壤介电特性的影响。结果表明，土壤温度随铅浓度升高而增加，突出了土壤热力学的显著变化。在高湿度条件下，温度升高更为明显，表明较高的铅浓度会提高土壤温度。此外，随着铅浓度增加，射频加热持续降低介电常数，这在较高电场强度下尤为明显。该研究发现，土壤电阻率接近未受污染土壤的电阻率，特别是在450 kV/m电场强度下，去除率最高可达46.154%。本调查为射频加热在铅污染环境中改善土壤质量的应用提供了有价值的见解，展示了介电特性如何反映未受污染土壤的特性。
