DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Yang, Ji-Won | - |
dc.contributor.advisor | 양지원 | - |
dc.contributor.author | Huq, Hasina Parvin | - |
dc.date.accessioned | 2011-12-13T01:54:42Z | - |
dc.date.available | 2011-12-13T01:54:42Z | - |
dc.date.issued | 2005 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=249584&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/29878 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2005.8, [ vii, 64 p. ] | - |
dc.description.abstract | The large scale contamination of many ground and surface water with perchlorate mostly occurred from the rocket fuel; presents a technical challenge. Existing methods for the perchlorate removal from groundwater involve complicated process and are expensive. The objective of this research is to identify and investigate perchlorate removal methods which are cost effective and easy to implement in groundwater. Surfactant mediated precipitation (SMP) and polyelectrolyte enhanced ultrafiltration (PEUF) processes for the removal of perchlorate were studied in this research. The feasibility in terms of the removal efficiency of perchlorate using these two methods was investigated based on their different parameters in presence of other common groundwater contaminants (nitrate, sulfate and carbonate). Cationic surfactant, cetylpyridinum chloride (CPC) was used in SMP process as precipitating agent to obtain precipitant containing perchlorate ion. The result shows that, up to 1 mM of CPC concentration which is around the CMC (critical micelle concentration, 0.9 mM), the perchlorate is removed in 1:1 or higher molar ratio of CPC to perchlorate due to the precipitant formation by ion exchange. While at 5 mM of CPC which is high above the CMC, perchlorate removal is inhibited due to micelle formation property of surfactant, in which some perchlorate absorbs in the micelle due to electrostatic force and remains in the supernatant. Furthermore, the removal efficiency decreases in presence of other ions (nitrate, sulfate and carbonate) because of the increase of the ionic strength of the solution; that results in the decremented activity of CPC in absorbing perchlorate ion. In PEUF process, poly(diallyldimethylammonium chloride), PDADMAC which is a cationic polyelectrolyte, was used to remove the anionic contaminant, perchlorate. In absence of other ions, perchlorate and PDADMAC system shows that lower amount of PDADMAC (up to 1 mM) can remove almost 90% of perchlorate from ... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | surfactant | - |
dc.subject | polyelectrolyte | - |
dc.subject | perchlorate | - |
dc.subject | ultrafilptration,precipitation | - |
dc.subject | 침전법 | - |
dc.subject | 한외여과 | - |
dc.subject | 계면활성제 | - |
dc.subject | 고분자전해질 | - |
dc.subject | 과염소산 | - |
dc.title | Perchlorate removal from groundwater by surfactant mediated precipitation and polyelectrolyte enhanced ultrafiltration | - |
dc.title.alternative | 계면활성제를 이용한 침전법과 고분자전해질로 향상된 한외여과를 이용한 지하수로부터 과염소산의 제거 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 249584/325007 | - |
dc.description.department | 한국과학기술원 : 생명화학공학과, | - |
dc.identifier.uid | 020034341 | - |
dc.contributor.localauthor | Yang, Ji-Won | - |
dc.contributor.localauthor | 양지원 | - |
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