Title page for etd-0804114-131040


[Back to Results | New Search]

URN etd-0804114-131040
Author Tsung-en Hsieh
Author's Email Address No Public.
Statistics This thesis had been viewed 5341 times. Download 0 times.
Department Environmental Engineering
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Bioremediation of dioxin-contaminated soils with the pretreatment of emulsified oil washing
Date of Defense 2014-07-24
Page Count 118
Keyword
  • Pseudomonas mendocina NSYSU
  • dioxin
  • soil washing
  • emulsified oil
  • bioremediation
  • Abstract Dioxins refers to a group of chemically and structurally related halogenated aromatic hydrocarbons including 75 polychlorinated dibenzo-p-dioxins (PCDDs) and 135 polychlorinated dibenzofurans (PCDFs) congeners. The highly chlorinated dioxin and furan isomer, octachlorinated dibenzo-p-dioxin (OCDD) and octachlorodibenzofuran (OCDF), and many of the other isomers have been detected in sediments, soils, and in the adipose tissue of livestock and fish in both rural and industrialized areas. The objective of this study was to evaluate the effectiveness of the developed two-stage system [including soil washing (stage 1) and bioremediation (stage 2)] on the remediation of OCDD/OCDF contaminated soils. In the stage 1 process, emulsified oil was applied for soil washing. In stage 2 process, Pseudomonas mendocina NSYSU (P.M. NSYSU) was inoculated in soils to enhance the OCDD/OCDF biodegradation efficiency. In the soil washing experiment, five different pore volumes (PVs) (5, 10, 20, 30, and 60) of emulsified oil solution were used for soil washing. After the soil washing stage, P. M. NSYSU was added in the solution to biodegrade the remaining OCDD/OCDF. Results indicate that approximately 90 and 91% of OCDD and OCDF remained in soils if 60 PVs of deionized water was used as the washing agent. Results also show that approximately 31 and 30% of OCDD and OCDF remained in soils if 60 PVs of emulsified soil (volume ratio for oil to water = 1: 50) was used as the washing agent. Approximately 33 and 36% of OCDD and OCDF remained in soils if 60 PVs of emulsified soil (volume ratio for oil to water = 1: 200) was used as the washing agent. Results from the biodegradation experiment show that higher OCDD/OCDF biodegradation rates can be obtained if lecithin can be added in the microcosms. This indicates that lecithin can be used as the carbon source, and thus, the stable growth of P. M. NSYSU can be achieved. Results from the biodegradation tests show that P. M. NSYSU became the dominant bacterium during the biodegradation process. In the two-stage treatment experiment, the remained OCDD and OCDF were about 15 and 17%, respectively, after stage 1 and stage 2 treatment. Thus, the two-stage treatment system will be a feasible technology to remediate OCDD/OCDF contaminated soils.
    Advisory Committee
  • Jong-Kang Liu - chair
  • Andy Hong - co-chair
  • Lei Yang - co-chair
  • How-Ran Chao - co-chair
  • Chin-Ming Kao - advisor
  • Files
  • etd-0804114-131040.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2014-09-09

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys