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研究生： TRAN THI NGOC NGAN
TRAN THI NGOC NGAN
論文名稱： Phosphate Removal by Waste Oyster Shell
Phosphate Removal by Waste Oyster Shell
指導教授： 劉志成
Jhy-Chern Liu
口試委員: Tsai Sheng-Long
Tsai Sheng-Long
Warmadewanthi
Warmadewanthi
學位類別： 碩士
Master
系所名稱： 工程學院 - 化學工程系
Department of Chemical Engineering
論文出版年： 2018
畢業學年度： 106
語文別： 英文
論文頁數： 102
中文關鍵詞： adsorption 、phosphate 、oyster shell 、thermal treatment 、water
外文關鍵詞： adsorption, phosphate, oyster shell, thermal treatment, water
相關次數： 點閱：136  下載：3 
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    • 廢牡蠣殼可以做為磷酸鹽的吸附劑。 利用平衡吸附和動力學評估其可行性，反應速率符
    合偽二階模型，物理吸附隨著pH值的增加而降低並符合Langmuir模型。 pH 7有良好的吸
    附效能歸因於表面沉澱。 熱處理後的牡蠣殼在鹼性條件下具有pH IEP ，但比表面積和孔徑
    都減小。 因此，熱處理不一定會增強磷酸鹽吸附。

    Waste oyster shell was used as an alternative adsorbent for phosphate removal. The equilibrium adsorption and kinetic studies were investigated to evaluate the feasibility. Pseudo-second-order model fitted the reaction rate well. Adsorption decreased with increasing pH mainly via physical adsorption and it can be described by Langmuir model. The pronounced adsorption at pH 7 could probably attribute to surface precipitation. Oyster shell after thermal treatment had pHIEP at more alkaline range, yet both specific surface area and pore size decreased. Thus, thermal treatment did not necessarily enhance phosphate adsorption.

    Abstract I Acknowledgment III Contents V Lists of figures VII Lists of tables X CHAPTER 1 INTRODUCTION 1-1 1.1 Background 1-1 1.2 Objectives 1-2 CHAPTER 2 LITERATURE REVIEW 2-1 2.1 Phosphorus 2-1 2.2 Phosphate removal from wastewater 2-1 2.2.1 Technologies for phosphate removal 2-1 2.2.2 Adsorption treatment in phosphate removal 2-2 2.2.2.1 Adsorption 2-2 2.2.2.2 Factors of phosphate adsorption 2-2 2.3 Reuse of oyster shell for phosphate removal 2-8 2.4 Thermal treatment 2-13 CHAPTER 3 MATERIALS AND METHODS 3-1 3.1 Materials 3-1 3.2 Instruments 3-2 3.3 Experimental methods 3-3 3.3.1 Pretreatment of oyster shell 3-3 3.3.2 Thermal treatment 3-3 3.3.3 Adsorption of phosphate 3-3 3.3.4 Kinetic study of phosphate adsorption 3-4 3.3.5 Characterization of oyster shell 3-5 3.3.5.1 BET surface area 3-5 3.3.5.2 X-ray diffraction (XRD) 3-5 3.3.5.3 Scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDX) 3-6 3.3.5.4 Fourier transform infrared spectroscopy (FTIR) 3-6 3.3.5.5 Zeta potential measurement 3-6 3.3.6 Phosphate analysis 3-7 3.3.7 Equilibrium modelling 3-7 3.4 Experimental flow chart 3-9 CHAPTER 4 RESULTS AND DISCUSSION 4-1 4.1 Characterization of oyster shell and preheated oyster shell 4-1 4.1.1 Fourier transforms infrared spectroscopy (FTIR) analysis 4-1 4.1.2 X-ray diffraction (XRD) analysis 4-5 4.1.3 Brunauer-Emmett-Teller (BET) analysis 4-7 4.1.4 Scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDX) analysis 4-8 4.1.5 Zeta potential 4-10 4.2 Removal of phosphate 4-13 4.2.1 Phosphate removal by oyster shell 4-13 4.2.1.1 Adsorption isotherm study 4-13 4.2.1.2 Kinetic study 4-17 4.2.2 Phosphate adsorption by oyster shell preheated at 400○C 4-19 4.2.2.1 Adsorption isotherm study 4-19 4.2.2.2 Kinetic study 4-25 4.2.3 Adsorption isotherm study of phosphate on oyster shell preheated at 700○C 4-27 4.3 Characterization of loaded oyster shell samples 4-29 4.3.1 Fourier transform infrared spectroscopy (FTIR) analysis 4-29 4.3.2 X-ray diffraction (XRD) analysis 4-33 4.3.3 Scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDX) analysis 4-37 4.4 Comparison with other adsorbents 4-40 CHAPTER 5 CONCLUSIONS AND RECOMMENDATIONS 5-1 5.1 Conclusions 5-1 5.2 Recommendations 5-2 REFERENCES R-1 APPENDIX A A-1 APPENDIX B B-1

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