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SYNTHESIS AND APPLICATION OF INORGANIC FUNCTIONAL ADSORBENTS AND POLYMER COMPOSITES FOR ANIONIC CONTAMINANT REMOVAL FROM WATER
수중 음이온 오염물질 제거를 위한 기능성 무기소재 및 고분자 복합체의 합성과 적용

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dc.contributor.advisor김성배-
dc.contributor.author김재현-
dc.date.accessioned2017-07-13T17:42:21Z-
dc.date.available2017-07-13T17:42:21Z-
dc.date.issued2017-02-
dc.identifier.other000000142058-
dc.identifier.urihttps://hdl.handle.net/10371/121062-
dc.description학위논문 (박사)-- 서울대학교 대학원 : 생태조경·지역시스템공학부, 2017. 2. 김성배.-
dc.description.abstractThis thesis deals with the synthesis, characterization, and application of an inorganic functional materials as adsorbents for phosphorous, chromium, and fluorine removal from aqueous solutions. The inorganic functional materials presented in this study include iron oxide nanoparticle-chitosan composite, triamine-functionalized mesoporous silica-polymer composite, calcined Mg-Fe layered double hydroxide-PVDF/PVA composite, and quintinite.
Iron oxide nanoparticle(ION)-chitosan composites were prepared using acidified chitosan, an environmentally friendly polymer, suspension to blend iron oxide nanoparticles by a cross-linking method. The removal of phosphate by ION-chitosan composites was verified by batch experiments, column experiments and pilot-scale adsorption tower experiment. The adsorption properties were analyzed and quantified using kinetic and equilibrium models and thermodynamic analysis. ION-chitosan composites successfully removed phosphate from aqueous solution and showed good reversibility, multicycle stability. It is a good candidate for environmentally friendly inorganic composites as adsorbents.
The characterization of triamine-functionalized mesoporous silica-polymer composites for Cr(VI) removal was also studied. The mesoporous material with various amounts of functional group had high surface area. The kinetics of the functionalized mesoporous silica were found to be sufficiently fast and it was observed that maximum sorption capacity was 330.88 mg/g. The composites showed good performance of chromate removal from real industrial wastewater.
The calcined Mg-Fe layered double hydroxide(LDH) was prepared through a co-precipitation and calcination at 300 oC. The calcined LDH could be used repeatedly for phosphate removal through desorption with 0.1 M NaOH solution. MgFe calcined LDH-PVDF/PVA composites also could be used for phosphate removal from aqueous solutions with regeneration and repeated use. The phosphate removal was relatively constant at an acidic and alkaline pHs.
Quintinite was applied as adsorbents for removal of phosphate and fluoride. The maximum phosphate adsorption capacity was 4.77 mgP/g. The phosphate adsorption to quintinite was not varied at pH 3.0 – 7.1 (1.50 –1.55 mgP/g) but decreased considerably at a highly alkaline solution (0.70 mgP/g at pH 11.0). Experimental results showed that the maximum adsorption capacity of fluoride to quintinite was 7.71 mg/g. The adsorption of fluoride to quintinite was not changed at pH 5 – 9 but decreased considerably at the highly acidic (pH < 3) and alkaline (pH > 11) solution conditions.
Therefore, this study elucidated that the inorganic functional materials removed phosphorous, chromium, and fluorine from aqueous solutions, effectively. These results also demonstrate that the functional polymer composites developed in this study can be applied to water treatment system.
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dc.description.tableofcontentsChapter 1 Introduction 1
1.1. Background 2
1.2. Objective 6

Chapter 2 Literature Review 9
2.1. Inorganic adsorbents for anionic contaminants removal 10
2.2. Composite adsorbents 15
2.3. Polymer composites 16
2.4. Data analyses 19

Chapter 3 Phosphate removal from aqueous solution by using iron oxide nanoparticle-chitosan composites 26
3.1. Materials and Methods 27
3.1.1. Synthesis of ION-chitosan composites 27
3.1.2. Characterization of ION-chitosan composites 28
3.1.3. Stream water samples 29
3.1.4. Batch experiments 31
3.1.5. Fixed-bed column experiment 34
3.1.6. Long-term pilot-scale experiment 36
3.2. Results and Discussion 41
3.2.1. Characteristics of ION-chitosan composites 41
3.2.2. Batch adsorption of phosphate 46
3.2.3. Kinetic, isotherm and thermodynamic model analyses 55
3.2.4. Fixed-bed adsorption of phosphate 67
3.2.5. Pilot test 71
3.2.6. Conclusions 74

Chapter 4 Preparation and characterization of triamine-functionalized mesoporous silica-polymer composites for Cr(VI) removal from industrial plating wastewater 75
4.1. Materials and Methods 76
4.1.1. Synthesis of DAEAPTS-SBA-15 PVA/alginate composites 76
4.1.2. Characterization of DAEAPTS-SBA-15 PVA/alginate composites 78
4.1.3. Industrial plating wastewaters 79
4.1.4. Batch experiments 83
4.1.5. Fixed-bed column experiments 86
4.2. Results and Discussion 88
4.2.1. Characteristics of DAEAPTS-SBA-15 88
4.2.2. Batch experiments 101
4.2.3. Kinetic, isotherm and thermodynamic model analyses 107
4.2.4. Fixed-bed adsorption of chromate 116
4.2.5. Conclusions 119

Chapter 5 Characterization of calcined Mg-Fe layered double hydroxide for phosphate removal from aqueous solutions 120
5.1. Materials and Methods 121
5.1.1. Synthesis of calcined Mg-Fe layered double hydroxide 121
5.1.2. Characterization of Mg-Fe CLDH 122
5.1.3. Phosphate sorption experiments 123
5.2. Results and Discussion 128
5.2.1. Characterization of Mg-Fe CLDH 128
5.2.2. Characterization of phosphate removal 133
5.2.3. Kinetic, isotherm and thermodynamic analyses 143
5.2.4. Conclusions 152

Chapter 6 Preparation and characterization of calcined Mg-Fe layered double hydroxide PVDF/PVA composites for phosphate removal from aqueous solutions 153
6.1. Materials and Methods 154
6.1.1. Synthesis of MgFe CLDH-PVDF/PVA composites 154
6.1.2. Characterization of MgFe CLDH-PVDF/PVA composites 155
6.1.3. Batch experiments 156
6.1.4. Fixed-bed experiments 160
6.2. Results and Discussion 162
6.2.1. Characteristics of MgFe CLDH-PVDF/PVA composites 162
6.2.2. Batch adsorption of phosphate 167
6.2.3. Kinetic, isotherm and thermodynamic model analyses 176
6.2.4. Fixed-bed adsorption of phosphate 186
6.2.5. Conclusions 189

Chapter 7 Removal of phosphate and fluoride from aqueous solution by quintinite particles 190
7.1. Materials and Methods 191
7.1.1. Synthesis of quintinite 191
7.1.2. Characterization of quintinite 192
7.1.3. Stream water samples 193
7.1.4. Batch experiments 195
7.2. Results and Discussion 200
7.2.1. Characteristics of quintinite 200
7.2.2. Batch adsorption of phosphate 206
7.2.3. Kinetic, isotherm and thermodynamic model analyses 214
7.2.4. Batch adsorption of fluoride 222
7.2.5. Kinetic, isotherm and thermodynamic model analyses 230
7.2.6. Conclusions 237

Chapter 8 General Conclusions and Recommendations 238
8.1 General conclusions 239
8.2. Recommendations 242

REFERENCES 243
국문 초록 259
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dc.formatapplication/pdf-
dc.format.extent8166244 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 대학원-
dc.subjectInorganic functional adsorbents-
dc.subjectPolymer composites-
dc.subjectIron oxide nanoparticles-
dc.subjectMesoporous materials-
dc.subjectLayered double hydroxides-
dc.subjectPhosphate-
dc.subjectChromate-
dc.subjectFluoride-
dc.subject.ddc712-
dc.titleSYNTHESIS AND APPLICATION OF INORGANIC FUNCTIONAL ADSORBENTS AND POLYMER COMPOSITES FOR ANIONIC CONTAMINANT REMOVAL FROM WATER-
dc.title.alternative수중 음이온 오염물질 제거를 위한 기능성 무기소재 및 고분자 복합체의 합성과 적용-
dc.typeThesis-
dc.description.degreeDoctor-
dc.citation.pages261-
dc.contributor.affiliation농업생명과학대학 생태조경·지역시스템공학부-
dc.date.awarded2017-02-
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College of Agriculture and Life Sciences (농업생명과학대학)Dept. of Landscape Architecture and Rural System Engineering (생태조경·지역시스템공학부)Theses (Ph.D. / Sc.D._생태조경·지역시스템공학부)
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