Effect of Soil Particle Size on Fluorescence Characteristics of Petroleum Hydrocarbons and Correction Methods
YANG Jin-qiang1, 2, 3, YANG Rui-fang1, 3*, ZHAO Nan-jing1, 3*, YIN Gao-fang1, 3, FANG Li1, 3, SHI Gao-yong1, 2, 3, LIU Liang-chen1, 2, 3, HUANG Peng1, 3, 4, LIU Wen-qing2, 3
1. Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2. University of Science and Technology of China, Hefei 230026, China
3. Key Laboratory of Optical Monitoring Technology for Environment of Anhui Province, Hefei 230031, China
4. School of Biological Food and Environment, Hefei University, Hefei 230601, China
Abstract：When using UV-induced fluorescence technology to detect petroleum hydrocarbon pollutants in soil, soil with different particle sizes will cause large errors in the measurement. To eliminate the influence of Soil particle size (PS) on the measurement, Three common soil petroleum hydrocarbon pollutants (soil crude oil, soil diesel oil, and soil gasoline) with different particle sizes of soil samples were prepared. Through the establishment of a UV-induced fluorescence detection system, the fluorescence characteristics of various soil petroleum hydrocarbon pollutants under different particle sizes were studied, and the correction method of soil petroleum hydrocarbon particle sizes was established. The results showed that for soil crude oil, soil diesel oil, and soil gasoline samples when the sample concentration was 4, 4 and 10 g·kg-1, the fluorescence signal of each type of soil oil sample had a good linear correlation with particle size. The correlation coefficients R2 reached 0.998 9, 0.968 6, and 0.904 5, respectively. The experimental results were interpreted and analyzed through the adsorption model of soil particulate matter. The soil particle size correction method was established to correct the fluorescence signals of petroleum hydrocarbon samples of different soil types under different particle sizes. Before and after particle size correction, the correlation coefficients R2 of fluorescence intensity and concentration of petroleum hydrocarbons in three types of soil increased from 0.326 5, 0.004 7, and 0.329 8 before correction to 0.983 8, 0.983 2, and 0.953 3 after correction, respectively. RE) were 11.02%, 5.71%, and 10.19%, respectively. The proposed correction method can effectively reduce the influence of soil particle size on the fluorescence intensity of petroleum hydrocarbon pollutants in soil and provides the theoretical basis and technical support for the rapid, in-situ, and accurate detection of petroleum hydrocarbon pollutants in soil by UV-induced fluorescence technology.
杨金强，杨瑞芳，赵南京，殷高方，方 丽，石高勇，刘梁晨，黄 朋，刘文清. 粒径对土壤石油烃荧光特性影响及校正方法研究[J]. 光谱学与光谱分析, 2024, 44(07): 2093-2100.
YANG Jin-qiang, YANG Rui-fang, ZHAO Nan-jing, YIN Gao-fang, FANG Li, SHI Gao-yong, LIU Liang-chen, HUANG Peng, LIU Wen-qing. Effect of Soil Particle Size on Fluorescence Characteristics of Petroleum Hydrocarbons and Correction Methods. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(07): 2093-2100.
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