Full metadata record
DC Field | Value | Language |
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dc.contributor.advisor | 박주양 | - |
dc.contributor.author | 성요셉 | - |
dc.date.accessioned | 2020-04-03T16:56:25Z | - |
dc.date.available | 2020-04-03T16:56:25Z | - |
dc.date.issued | 2009-02 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/144950 | - |
dc.identifier.uri | http://hanyang.dcollection.net/common/orgView/200000410580 | en_US |
dc.description.abstract | 오늘날 소수성 유기화합물로 오염된 토양의 처리는 중요한 문제로 대두되고 있다. 많은 오염물질 중 다환방향족탄화수소 (PAHs)는 유기물의 불완전한 연소과정에서 발생되며 토양에 유입되어 토양 및 수질 오염 등과 같은 환경오염을 유발하게 된다. Fenton reaction은 오늘날 환경기술분야에서 응용가능성이 높아 큰 주목을 받고 있다. 하지만 오염토양에 Fenton reaction을 적용함에 있어서 과산화수소의 빠른 소모로 과량의 과산화수소가 요구되어지는 것이 단점으로 지적되고 있다. 이에 본 연구에서는 대표적인 PAHs물질인 phenanthrene으로 오염된 토양 처리를 위해 철의 리간드로 acetate를 사용하여 과산화수소의 안정성 확보를 통하여 공정의 효율을 높이고자 하였다. Acetate는 철의 몰농도에 대비하여 0.5배에서 3배(2mM-12mM)까지 주입하였고, 과산화수소는 분해 효율에 미치는 영향을 배제하기 위해 낮은 농도인 0.35%와 0.7%를 주입하였다. 실험결과 acetate가 8mM 이상 주입된 경우 과산화수소의 잔류시간은 50배이상 증가하였으며, 과산화수소의 안정성이 확보됨에 따라 phenanthrene의 제거율도 70%까지 향상되었다. 그러나 8mM이상의 acetate가 주입될 경우 scavenger로 작용하여 제거율을 높이지는 못했다. 반응 중에 철은 2가와 3가로 산화환원을 반복하였고 과산화수소가 모두 분해되는 시점부터 HO₂· 에 의해 2가철로 환원이 이루어졌다. 과산화수소의 영향으로 반응중의 pH는 산성영역을 나타냈으며, acetate가 8mM이상 주입되었을 때 4-5범위 내에 머무르는 것을 확인하였다. Fenton reaction에 의해 철의 리간드로 사용된 acetate 역시 분해가 이루어지는 것을 확인할 수 있었으며, phenanthrene의 비해 분해되는 시점이 느린 것으로 나타나 분해되어지는 경쟁관계에서 phenanthrene이 우세한 것으로 판단된다. 이상의 연구결과를 통해 오염 토양처리에 기존 Fenton reaction의 효율성과 경제성을 향상시킬 수 있는 가능성을 확인할 수 있었으며, 중성영역의 pH로 확장된 연구 등을 통해 좀 더 현실적인 공법으로 나아갈 수 있으리라 판단된다.; The removal of hydrophobic organic compounds(HOCs) from contaminated soil is becoming a major concern. Among many pollutants, polycyclic aromatic hydrocarbons (PAHs) caused by the imperfect combustion of organic materials induce such environmental pollution as soil and/or water pollution by flowing into soil. The Fenton reaction has attracted considerable attention because of promising applicability as an environmental technology. However, due to rapid consumption of hydrogen peroxide, large amount of hydrogen peroxide is required when Fenton reaction is applied to the contaminated soil. In This study, acetate was employed as a ligand of Fe^(2+) to enhance the efficiency of removal of phenanthrene by securing the stability of hydrogen peroxide. 0.5-3 times of acetate (2mM-12mM) was added compare to molar concentration of Fe^(2+). Low initial concentration of hydrogen peroxide was 0.35% and 0.7% to eliminate side effect of removal efficiency. The result showed that hydrogen peroxide lifetime was lasted up to 72 hours,or more than 50 times of normal lifetime, when more than 8mM of acetate was added. Phenanthrene removal efficiency was improved up to 70% according to stabilized hydrogen peroxide. However, it was detected that acetate acted as a scavenger when it was added more than 8mM and, consequently, the efficiency ratio of phenanthrene removal was low. Ferrous ion was oxidized to ferric ion and oxidation-reduction was repeated during the reaction. Finally ferric ion was reduced to ferrous by HO₂·. It was confirmed that, due to the influence of hydrogen peroxide, pH was acid region and it remained at the range of 4-5 when 8mM or more of acetate was added. Acetate, the ligand of Fe, was also decomposed by Fenton reaction. The decomposition time of acetate was slower than phenanthrene. Therefore, it was able to come to the conclusion that phenanthrene was superior to acetate at the competition of decomposition. Through the results of this study, it was able to identify the possibilities to improve the efficiency of Fenton reaction on the contaminated soil and its economic feasibility, and to move to more realistic technique through expanded research with neutral pH region. | - |
dc.publisher | 한양대학교 | - |
dc.title | Fenton Reaction을 이용한 Phenanthrene 오염 토양 처리에서 Acetate의 영향 | - |
dc.title.alternative | Influence of Acetate on the Removal of Phenanthrene from Contaminated Soil using Fenton Reaction | - |
dc.type | Theses | - |
dc.contributor.googleauthor | 성요셉 | - |
dc.contributor.alternativeauthor | Seong, Joseph | - |
dc.sector.campus | S | - |
dc.sector.daehak | 대학원 | - |
dc.sector.department | 토목공학과 | - |
dc.description.degree | Master | - |
dc.contributor.affiliation | 환경공학 전공 | - |
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