DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Woo-Jin | - |
dc.contributor.advisor | 이우진 | - |
dc.contributor.author | Lee, Young-Min | - |
dc.contributor.author | 이영민 | - |
dc.date.accessioned | 2011-12-13T02:34:45Z | - |
dc.date.available | 2011-12-13T02:34:45Z | - |
dc.date.issued | 2010 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=418871&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/30688 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 건설및환경공학과, 2010.2, [ iv, 33 p. ] | - |
dc.description.abstract | Degradation of trichloroethylene (TCE) and tetrachloride (CT) by a modified Fenton reaction was investigated in aqueous solution. Fenton reaction can be significantly enhanced in the presence of Fe(II) chelated by cross-linked chitosan (CS) with glutaraldehyde (GLA) at near-neutral pH. A remarkable oxidative degradation of TCE ($1.838\h^{-1}$) was observed in modified Fenton system with Fe(II)-CS/GLA (10 mM and $2\g L^{-1}$, respectively) and $H_2 O_2$ (318 mM), while no significant degradation ($0.005\h^{-1}$) was observed in classic Fenton reaction system with Fe(II) (10 mM) and $H_2 O_2$ (318 mM) at pH 7 in 5 hrs. The kinetic rate constants for the degradation of TCE in modified Fenton system was dependent on the initial suspension pH, Fe(II) loading, CS/GLA dosage, and concentration of $H_2 O_2$. We have also observed 74.8 % of CT degradation by the Fe(II)-CS/GLA in modified Fenton system, while 43 % of CT degradation has been done in classic Fenton system in 10 hrs at pH 6. The degradation of CT in modified Fenton system was dependent on the concentration of $H_2 O_2$, Fe(II) loading, and concentration of CT. TCE and CT transformation was conducted by monitoring its disappearance and chloride ion ($Cl^{-}$) released with time. The concentration of $Cl^{-}$ was rapidly produced and its total mass recovery was reached more than 91 % during modified Fenton reaction. Addition of the hydroxyl radical scavenger 2-propanol to modified Fenton reactions significantly enhanced the CT degradation (removal efficiency from 57.2 % to 92.4 %), while TCE degradation was strongly inhibited in 5 hrs reaction time (removal efficiency from 74.7 % to 19.9 %). These results confirm the reductive reaction mechanism of CT by modified Fenton reaction with CS/GLA. Moreover, it shows that modified Fenton reaction with CS/GLA not only oxidizes TCE, but also effectively reduces CT at near-neutral pH. We observed the formation of surface Fe(II)-CS/GLA complex using microscopic analyses... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | trichloroethylene | - |
dc.subject | iron sorption | - |
dc.subject | chitosan | - |
dc.subject | Fenton reaction | - |
dc.subject | tetrachloride | - |
dc.subject | 4염화탄소 | - |
dc.subject | 트리클로로에틸렌 | - |
dc.subject | 철이온 흡착 | - |
dc.subject | 키토산 | - |
dc.subject | 펜톤반응 | - |
dc.title | Chelate based-Fenton reaction for the degradation of chlorinated aliphatic hydrocarbons by new polymeric chelating agent (cross-linked chitosan) | - |
dc.title.alternative | 새로운 킬레이트 물질(chitosan)을 통한 염소계 지방족 화합물의 킬레이트 펜톤 분해 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 418871/325007 | - |
dc.description.department | 한국과학기술원 : 건설및환경공학과, | - |
dc.identifier.uid | 020083383 | - |
dc.contributor.localauthor | Lee, Woo-Jin | - |
dc.contributor.localauthor | 이우진 | - |
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