| Summary: | 碩士 === 國立高雄海洋科技大學 === 海洋環境工程研究所 === 95 === The objective of this research was to study the soil properties affecting the examination of Total petroleum Hydrocarbon(TPHs) in soil by two rapid on-site screening methods Turbidimetric Test kits and Immunoassay Test kits.Results also compared with laboratory Gas Chromatograph (GC) method.The site studied was contaminated by petroleum products, which was divided into three areas (site A, B, C). To evaluate the applicability of above methods, total petroleum hydrocarbon (TPH) concentration in 49 soil samples and their soil properties soil were evaluated.
The results showed that the correlation coefficient (R2) between turbidimetric field method and GC/FID method after deducting the deviation from raw data was 0.7745. Further, as to the soil properties, correlation decreased with the increasing water and organic content in soil but it was not obviously affected by TPH values. Besides, in the influence of soil texture on analysis data, only one TPH data was detected by either turbidimetric field method or GC/FID method because of the weak petroleum adsorbability on sandy soil. Results show that TPH values from turbidimetric field method were mostly false negative for water content in soil.
As to the correlation between immunoassay field method and GC/FID method, it is difficult to compare with these two methods because that immunoassay field method was semiquantitative screening. In general, 87.5% samples with immunoassay field method was well correlate to GC/FID method.
Results of GC/FID method ,show that gasoline appeared only at soil sample #5, #13, #46 and #49, indicating the major pollutants in this site contaminated by heavy petroleum compounds (C10~C40). After fitting chromatogram of samples, the results showed that the main oil type was Motor oil.
To determine the contaminated levels, TPH contour maps were drawn according to TPH analyzed by turbidimetric field method and GC/FID method. The maps displayed higher contaminant concentration was located near site C. Therefore, rapid screening methods were indeed applicable to contaminated site.
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