TY -的A2 Lisetskii费多尔AU - Dahim,默罕默德盟——Abuaddous·穆萨布·AU -伊斯梅尔Rabah盟——Al-Mattarneh哈西姆盟——Jaradat Aiman PY - 2020 DA - 2020/12/14 TI -使用介质电容单元确定介电性能的纯砂人为污染的铅、Cd,铁、本文提出了一种新的介质电容单元法，用于测量被4种重金属污染的纯砂的阻抗。根据实测的砂粒阻抗，计算了干净砂粒和污染砂粒在不同水平下的介电常数和损耗因子。所提出的介质电容电池的优点是成本低、计算简单、校准程序简单、轻便、易于修改电极以适应现场测试。在实验室对纯砂进行Pb、Cd、Fe、Zn人为污染水的饱和处理，重金属含量分别为0、7.5、15、22.5和30 mg/kg。在100 kHz ~ 1000 kHz频率范围内对污染砂土的介电特性进行了评价。受污染砂土的介电常数和损耗因数与未受污染砂土不同。各重金属的介电常数均随污染程度的增加而减小。这可能是由于存在重金属时极化机制发生了变化。沙尘损失因子随着污染程度的增加而增加。 This may be explained by the increase of ionic conductivity of pore water with heavy metal in the sand. Sand polluted with heavy metal with higher resistivity and density possess a higher dielectric constant and lower loss factor than other polluted metals. Evaluation of the dielectric characteristics of polluted sand could have the potential to monitor heavy metal pollution. Even with promising results obtained with the proposed dielectric device, it is necessary to explore several other factors affecting the measurements such as sand water content, soil texture, and type of soil. Also, testing polluted soil near industrial pollution is needed. SN - 1687-7667 UR - https://doi.org/10.1155/2020/8838054 DO - 10.1155/2020/8838054 JF - Applied and Environmental Soil Science PB - Hindawi KW - ER -