太赫兹光谱技术对土壤污染物检测分析的研究

Study on detection and analysis of soil pollutants by terahertz spectroscopy

为评估土壤的污染和修复程度,利用太赫兹光谱技术检测了土壤无机金属污染物六价铬与有机污染物微塑料的存在及含量。通过消除水对太赫兹波的影响,基于土壤、六价铬和微塑料对太赫兹波光谱特征性吸收,选择不同参量实验样品的时域信号处理分析得出太赫兹谱域吸收系数和折射率结果,分析讨论了土壤污染特征数据与变化趋势。研究表明太赫兹技术对两种典型土壤污染物探测具有可行性,提供了一种极具发展潜力的土壤污染物新型检测方法。

In order to evaluate the degree of soil pollution and remediation, terahertz(THz) spectroscopy is used to detect the presence and content of inorganic metal pollutant Cr(VI) and organic pollutant microplastics in soil. By eliminating the influence of water on terahertz wave and based on the characteristic absorption of terahertz wave spectrum by soil, hexavalent chromium and micro plastic, the time-domain signal processing analysis of experimental samples with different parameters is selected to obtain the results of terahertz spectral absorption coefficient and refractive index, and the characteristic data and change trend of soil pollution are analyzed and discussed. The research results show that terahertz technology is feasible for the detection of two typical soil pollutants, which provides a new detection method with great development potential.