DC 欄位 | 值 | 語言 |
dc.contributor | 蔣本基 | zh-TW |
dc.contributor | 臺灣大學:環境工程學研究所 | zh-TW |
dc.contributor.author | 盛佑鼎 | zh-TW |
dc.contributor.author | Sheng, You-Ding | en |
dc.creator | 盛佑鼎 | zh-TW |
dc.creator | Sheng, You-Ding | en |
dc.date | 2008 | en |
dc.date.accessioned | 2010-05-10T04:08:50Z | - |
dc.date.accessioned | 2018-06-28T23:24:06Z | - |
dc.date.available | 2010-05-10T04:08:50Z | - |
dc.date.available | 2018-06-28T23:24:06Z | - |
dc.date.issued | 2008 | - |
dc.identifier.other | U0001-2907200813505900 | en |
dc.identifier.uri | http://ntur.lib.ntu.edu.tw//handle/246246/181573 | - |
dc.description.abstract | 由於薄膜對於微量污染物與天然有機物具有非常高的去除能力。因此近年來,薄膜技術被選為為淨水流程的高級處理技術,使飲用水水能符合嚴格的飲用水質標準。篇論文主要探討的方向有兩個(1)UF/NF薄膜對於天然有機物與微囊藻毒-LR的去除效率與機制(2)使用薄膜技術控制三鹵甲烷的生成趨勢(THMFP)。實驗結果得知,天然有機物中的疏水性物質由於比親水性物質具有較高的UV254與SUVA值,因此疏水性物質具有較顯著的芳香族特性。薄膜處理疏水性物質時,DOC 去除率高達96%且DOC殘留濃度非常低(小於0.2ppm)。此外,薄膜於不同操作壓力下,親水性物質對於UV254的去除率達80~85%,疏水性則為95~98%。過24小時操作結果顯示,與疏水性物質相較之下,親水性物質的通量衰減程度較高,因此具較高積垢生成的趨勢。但從GFC分子量分布圖顯示,不管是親水性或疏水性物質,其中具低濃度與低分子量(350Da~500Da)的物質均會通過薄膜,所以無法完全被去除。囊藻毒-LR的去除成效與天然有機物結果相似(在薄膜高壓的操作條件下,有高的去除效果)。由於積垢沉澱模式、孔阻塞模式與吸附模式均具有很高的相關係數,因此這三種模式可被假設為造成薄膜積垢的主要機制。 | zh-TW |
dc.description.abstract | In recent years, membrane filtration has been considered as an advanced water treatment technology, able to provide drinking water to meet stringent drinking water regulations. Membrane processes are often chosen to achieve a high removal of micropollutants and NOMs.s a result, the purposes of this study include: (1) the investigation of the removal efficiencies and mechanisms of NOMs and Microcystin-LR by the ultra-filtration (UF) and nano-filtration(NF) membranes, and (2) the control of trihalomethane formation potential (THMFP) in Tai-Lake source water through the membrane process.he results of this research work indicate that the hydrophobic substances exhibit higher aromaticity of NOMs than the hydrophilic substances because of their higher UV254 and SUVA values. For the hydrophobic substance, the DOC removal efficiency was over 96% and residual DOC concentration was very low (below 0.2 ppm). The UV (254 nm) absorbance reductions rejection ratio was 80~85% for hydrophilic substances and 95~98% the hydrophobic at various operating pressures. he hydrophilic substance caused a higher fouling potential than the hydrophobic substance over the 24 hour operation. From the GFC diagram, both the hydrophilic and hydrophobic water samples (fractionated form DAX-8 resin) could not be removed by the NF membrane process completely because the diffusion of low concentration DOC with a low molecular weight distribution(350~500 Da).he tendency for removal of microcystin-LR (MC-LR) was similar to that of NOMs rejection (i.e. the higher pressure operation reveals better removal efficiency). The high correlation coefficients in the cake deposit model, the pore blocking model and adsorption model suggest that the three mechanisms should cause fouling in membrane process. | en |
dc.description.tableofcontents | Abstract I要 IIIontents IVist of Figures VIIable of Figures Xhapter 1 Introduction 1-1.1 Background 1-1.2 Objectives 1-3hapter 2 Literature Review 2-1.1 NOM Characteristics in Source Water 2-1.2 Microcystins in Reservoir 2-3.2.1 Characteristics of Microcystins 2-4.2.2 Conventional Water Treatment Processes 2-6.2.3 Advanced Water Treatment Process 2-7.3 Isolation of NOM Fraction 2-9.3.1 Resins Fraction 2-9.3.2 Gel Filtration Chromatography 2-10.4 Parameters Affecting the Performance of NF Membrane Process 2-11.4.1 Characteristics of Membrane 2-11.4.2 Characteristics of Feed Solution 2-14.4.3 Concentration Polarization and Membrane Fouling 2-15.5 Predicting Models of NF Membranes 2-17.5.1 Rejection Mechanisms of Membrane 2-17.5.2 NF Predicting Models 2-18hapter 3 Materials and Methods 3-1.1 Experiment Design (Figure 3-1 ) 3-1.2 Instruments and Methods 3-3.2.1 Pretreatment Process 3-3.2.2 Membrane Filtration Setup 3-3.2.3 Molecular Weight Distribution 3-6.3 Analytical Methods 3-7.3.1 TOC Measurement 3-7.3.2 UV254 Measurement 3-8.3.3 Microcystin-LR Measurement 3-9.3.4 THM Measurement 3-12.3.5 Observation of Membrane Surface 3-14hapter 4 Results and Discussions 4-1.1 Characteristics of NF Membrane 4-1.1.1 Determination of Water Permeability 4-1.1.2 Identification of Functional Groups of Membrane 4-3.1.3 SEM Images of NF270 Membrane 4-4.2 Identification of NOMs in Source Water 4-6.2.1 NOM Fractionation of Source Water 4-7.2.2 Molecular Weight Distributions of Source Water and Membrane Filtrate 4-10.3 Influences of NOMs on NF membrane Filtration Process 4-13.3.1 Hydrophobic Substances 4-13.3.2 Hydrophilic Substances 4-19.3.3 Comparison of the Characteristics of the Hydrophobic and Hydrophilic in Membrane Process 4-23.3.4 Performance of Tai-Lake Source Water Treated by UF/NF Process 4-29.4 The Microcystin-LR removal efficiency by UF/NF membrane 4-33.4.1 Determination of Microcystin-LR 4-33.4.2 Rejection of Microcystin-LR by UF/NF membrane 4-34.5 Model Development for NOMs and MC-LR Reductions by NF270 Membrane 4-36.5.1 Determination of Fouling Mechanisms 4-36.5.2 Prediction of Rejection Ratio by Combined Solution-Diffusion /Film Theory Model 4-40hapter 5 Conclusions and Recommendations 5-1.1 Conclusions 5-1.2 Recommendations 5-3eference 1 | en |
dc.format | application/pdf | en |
dc.format.extent | 9721408 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language | en | en |
dc.language.iso | en_US | - |
dc.subject | 天然有機物 | zh-TW |
dc.subject | 超過濾 | zh-TW |
dc.subject | 奈米過濾 | zh-TW |
dc.subject | 三鹵甲烷生成趨勢 | zh-TW |
dc.subject | 親水性物質 | zh-TW |
dc.subject | 疏水性物質 | zh-TW |
dc.subject | 微囊藻毒LR | zh-TW |
dc.subject | Natural organic matters (NOMs) | en |
dc.subject | ultra-filtration (UF) | en |
dc.subject | nano-filtration (NF) | en |
dc.subject | THM formation potential (THMFP) | en |
dc.subject | hydrophilic substance | en |
dc.subject | hydrophobic substance | en |
dc.subject | microcystin-LR (MC-LR) | en |
dc.subject.classification | [SDGs]SDG11 | - |
dc.title | 奈米薄膜去除天然有機物與微囊藻毒-LR之研究 | zh-TW |
dc.title | Removal of NOMs and Microcystin-LR by NF Membrane | en |
dc.type | thesis | en |
dc.identifier.uri.fulltext | http://ntur.lib.ntu.edu.tw/bitstream/246246/181573/1/ntu-97-R95541125-1.pdf | - |
item.openairetype | thesis | - |
item.fulltext | with fulltext | - |
item.languageiso639-1 | en_US | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_46ec | - |
item.grantfulltext | open | - |
顯示於: | 環境工程學研究所
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