Advanced heterogeneous fenton oxidation of 1,4-dioxane using zero-valent iron at neutral pH = 영가철-고도 펜톤 공정을 이용한 중성 pH에서의 1,4-dioxane의 분해

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1,4-dioxane is currently used as a solvent in several industries. Conventional wastewater treatment technologies are ineffective for removal of 1,4-dioxane. Fenton oxidation process, one of the advanced oxidation processes (AOPs), shows high effectiveness for removal of organic contaminants. But traditional Fenton process has narrow working pH range (3~4), needs a lot of hydrogen peroxide, and there is no possibility of recycling the catalyst. In this study solid catalyst, zero-valent iron ($Fe^0$) was used to overcome limitations of traditional Fenton oxidation process. Oxidation of 1,4-dioxane using microscale $Fe^0$ was investigated with several major variables-presence of oxygen, initial pH, $H_2O_2$ dose and recycling of $Fe^0$ was also conducted. Nanoscale $Fe^0$ was synthesized and compared with microscale $Fe^0$ in removal efficiency. And ultrasonic irradiation was applied with Fenton process to enhance removal efficiency. In the presence of dissolved oxygen, $Fe^0$ generated $H_2O_2$ and remove 1,4-dioxane without an addition of oxidant. And removal remained efficient even at high pH. Wide working pH range implies that pH adjustment before treatment is not necessary. The formation of iron oxides did not obviously influence the activity of $Fe^0$ after recycling the used $Fe^0$. And ultrasonic irradiation greatly enhanced removal efficiency through enhancing generation of $H_2O_2$.
Advisors
Yang, Ji-Wonresearcher양지원researcher
Description
한국과학기술원 : 환경에너지공학학제전공,
Publisher
한국과학기술원
Issue Date
2009
Identifier
308949/325007  / 020073283
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 환경에너지공학학제전공, 2009.2, [ ix, 64 p. ]

Keywords

Fenton; zero-valent iron; 1,4-dioxane; 영가철; 펜톤; 1,4-다이옥산

URI
http://hdl.handle.net/10203/51500
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=308949&flag=dissertation
Appears in Collection
MS-Theses_Master(석사논문)
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