Development of Low Temperature Thermal Desorber to Analyze Petroleum-Contaminated Soil and Analysis of the Weathering of Petroleum Hydrocarbon in Soil

• Main Authors: Ji, Yun Zhong, 季允中
• Other Authors: Cheng Shuang-Fu
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/55328116223705707597

碩士 === 國立屏東技術學院 === 環境工程技術研究所 === 85 === Petroleum pollution of soil has often been reported in a well developedand prosperous society. The methods currently used to analyze petroleum conta-minated soil are time-consuming and expensive. The study used the principle of low temperature thermal desorption to develop a new analytical method which is simple, easy and economical. It has no secondary pollution and can be used on- site. The optimum analytical factorsassociated with the method have also been developed. In 5g of dry soil with 0-5% water content and with TPH concentrations ranging from 100 to 10,000 mg/kg, and under a desorption temperature of 200℃,the new method could, on an average, recover 87±10% of TPH after correction with moisture calibration curves. The study also investigated the weathering rate of soil spiked with 95- unleaded gasoline, aviation fuel(JP-4) and diesel oil under different concent-ration, temperature, moisture contents and with or without sterilization. It compared the change in soil components to determine the type of petroleum pollutants. The study showed that weathering rate was accelerated when temper-ature and moisture content were raised. Soil microbes also enhanced the weath-ering rate of petroleum contaminated soil. It was firsorder in the weathering reaction of three types of petroleum contaminated soil and has no relate to spike concentration. The results also showed that the n- C11/n-C12 ratio of petroleum contaminated soil was approximately the same before and after the weathering and the ratio of three types of oil was difference each other therefore, the n-C11/n-C12 ratio could be used to indicate the type of oil contamination.