Multiple physico-chemical remediation methods for diesel and lubricant contaminated soils
| Autor: | LUO,WEN-HONG, 羅文鴻 |
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| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 Soil contamination caused by oil in Taiwan was often happened in the recent years. Multiple and creative technologies were therefore developed to remediate diesel contaminated soils of a gas station site (H site, TPH = 2,840 mg/kg) and lubricating oil contaminated soils of a manufactory site (S site, TPH = 77,853 mg/kg) and to examine each remediation performance. The remediation technology applied to H site soil were ozone and microwave, and the objective soils were saturated zone soil (with water) and vadose zone soil (without water). The microwave remediation conditions planned were soil sample container with or without cover to investigate the cover effect on microwave energy loss, temperature increase, soil TPH, and to observe the final TPH after treatment. The results showed that the TPH of water containing soil with cover and without cover were 934 and 577 mg/kg respectively, and the TPH of dry soil with cover and without cover were 520 and 141 mg/kg respectively. Furthermore, all of soils with microwave assisted temperature higher than 200 °C could meet the TPH remediation goal (< 1,000 mg/kg). Additionally, Ozone remediation for vadose zone soil (pH = 5.5) and saturated zone soils (pH = 7, 9, 11) were designed to explore the effects of ozone direct and indirect reactions on soil TPH and to detect the final TPH after remediation. The results showed that the TPH of vadose zone soil and saturated zone soils (pH = 7, 9, 11) were 1,257, 1,110, 913, and 735 mg/kg respectively; both of soils of pH = 9 and 11 met the remediation goal. The remediation methods (water removing oil, surfactant removing oil, thermal treatment (hot steaming, grilling, and 550 °C), and remediation train) for low contaminated soil (TPH = 1,220 mg/kg) and high contaminated soil (TPH = 77,853 mg/kg) of S site were applied in the first phase. The results showed that the TPHs of low contaminated soil treated by water removing oil, grilling (220 ° C), and 550 ° C treatment were all below the regulatory limit; however, only 550 ° C treatment could meet the remediation goal for high contaminated soil. Advanced remediation methods considering remediation cost and energy was applied in the second phase. The remediation methods (new water removing oil (NWro), new surfactant removing oil (NSro), new hot steaming (NH), and remediation train) for medium contaminated soil (TPH = 3,741 mg/kg) and high contaminated soil (TPH = 77,853 mg/kg) of S site were employed in the second phase. The results showed that the TPHs of medium contaminated soil treated by NWro + NH for 1 and 2 weeks, NSro + NH for 1 and 2 weeks, NH for 3 and 7 days were 27, 24, 31, 21, 299, and 58 mg/kg respectively, and all were far below the regulatory limits. Additionally, the TPH of high contaminated soil treated by NWro + NH for 3 weeks was 2,060 mg/kg; one more week the TPH was guessed to meet the remediation goal. All of the results can be provided as a reference for the remediation of lubricant contaminated site. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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