Alow-cost Zeolite from Coal Fly Ash for Sr and Cs Removal fr
发布时间：2021-10-17 08:47
随着社会经济和工业发展,粉煤灰的无序堆放对环境污染越来越严重,其对大气、土壤、地下水的污染对人类的健康也造成了一定的威胁。利用粉煤灰作为合成沸石分子筛的原材料,不仅可以为被锶、铯等污染的海水吸附净化提供一种价格低廉、性能良好的吸附剂,同时也实现了粉煤灰以废治废的资源化利用,有助于减轻粉煤灰造成的环境问题。本文以内蒙古托克托县大唐国际粉煤灰为主要原料,采用碱熔融水热法制备沸石分子筛,研究了合成过程中碱灰比、陈化时间、水热晶化温度、水热晶化时间等试验条件对合成产物的影响,并对试验合成的产物进行了表征。扫描电镜（SEM）可观察到产物中属于粉煤灰中的球状、钝角状、不规则碎屑状颗粒基本消失,合成产物具有N-1型沸石、Na-P1型、方钠石、方沸石典型结构,形状规则,轮廓清晰,分散度较好;X射线衍射（XRD）图谱表明,合成产物具有N-1型沸石、Na-P1型、方钠石、方沸石较强的衍射峰,表明由粉煤灰在适当的试验条件下成功的合成了混合相分子筛。选取含有Cs+、Sr2+的模拟污染海水为处理目标,研究制备的混合相沸石分子筛对Cs+、Sr2+的吸附性能。初步探讨了 Cs+、Sr2+离子浓度、pH、吸附时间、吸...
【文章来源】：西南科技大学四川省
【文章页数】：66 页
【学位级别】：硕士
【文章目录】：
ABSTRACT
摘要
1 Introduction of Research Objectives
1.1 Background
1.1.1 Coal
1.1.2 Fly Ash
1.1.3 Current status of Fly Ash Utilization in China
1.1.4 Production of Inorganic Fibre
1.1.5 Production of Geopolymers
1.2 Zeolites
1.3 Problem Statement
1.4 Research Objective
1.5 Significance of this study
1.6 Environmental impacts of fly ash
1.7 Scope and limitations of the thesis
2 REVIEW OF LITERATURE ON CFA
2.1 General Introduction
2.2 Properties of Fly Ash
2.3 Chemical Properties
2.4 Physical Properties
2.5 Classification of Fly Ash
2.6 Fly ash as a cement and concrete additive
2.7 The use of fly ash in the treatment of acid mine drainage
2.8 Zeolite synthesis from fly ash
2.9 Zeolites
2.9.1 Zeolite Framework Structure
2.10 Properties and Application of Zeolites
2.11 Zeolite Applications
2.12 Ion-exchange properties of zeolites
2.13 Adsorption Capacity for Zeolites
2.14 Catalysis/catalytic applications of zeolites
2.15 Classification of Zeolites
2.16 Synthetic Zeolites
2.17 Zeolite synthesis from Coal Fly Ash
2.18 Methods of Zeolite Synthesis
3 Materials & Method
3.1 Introduction
3.1.1 SECTION A:Synthesis of Zeolite Different types of zeolites(Zeolite N-L,Zeolite Na-P1,Sodalite,Analcime)
3.2 Sample Collection & Preservation
3.3 Synthetic Procedure
3.4 Aging Step Phase One
3.4.1 Aging Step Phase Second
3.5 Hydrothermal Synthesis
3.6 Measurement Parameters
3.7 Material
3.8 Fusion
3.9 Crystalization step
3.10 XRD
3.11 Sample preparation and procedure
3.12 Determination of percentage crystallinity
3.13 Quantification of the zeolite phase
3.14 Quantitative XRD analysis
3.15 Sample preparation and procedure
3.16 X-ray Fluorescence spectrometry
3.17 Scanning Electron Microscopy
3.18 Atomic Absorption Spectroscopy (AAS)
4 RESULTS &DISCUSSIONS
4.1 Introduction
4.2 Chemical composition of the fly ashes
4.3 Mineralogical Analysis
4.4 XRD
4.5 Zeolite (Analcime)
4.5.1 Physical Properties of Analcime
4.6 Zeolite Sodalite
4.6.1 Physical Properties
4.7 X-ray Fluorescence Spectrometry
4.7.1 Results
4.8 Morphological Properties
4.9 Making Artifical Seawater
4.10 Atomic Absorption Spectroscopy
5 CONCLUSIONS
Recommendations and future work
Acknowledegement
References
本文编号：3441477
【文章来源】：西南科技大学四川省
【文章页数】：66 页
【学位级别】：硕士
【文章目录】：
ABSTRACT
摘要
1 Introduction of Research Objectives
1.1 Background
1.1.1 Coal
1.1.2 Fly Ash
1.1.3 Current status of Fly Ash Utilization in China
1.1.4 Production of Inorganic Fibre
1.1.5 Production of Geopolymers
1.2 Zeolites
1.3 Problem Statement
1.4 Research Objective
1.5 Significance of this study
1.6 Environmental impacts of fly ash
1.7 Scope and limitations of the thesis
2 REVIEW OF LITERATURE ON CFA
2.1 General Introduction
2.2 Properties of Fly Ash
2.3 Chemical Properties
2.4 Physical Properties
2.5 Classification of Fly Ash
2.6 Fly ash as a cement and concrete additive
2.7 The use of fly ash in the treatment of acid mine drainage
2.8 Zeolite synthesis from fly ash
2.9 Zeolites
2.9.1 Zeolite Framework Structure
2.10 Properties and Application of Zeolites
2.11 Zeolite Applications
2.12 Ion-exchange properties of zeolites
2.13 Adsorption Capacity for Zeolites
2.14 Catalysis/catalytic applications of zeolites
2.15 Classification of Zeolites
2.16 Synthetic Zeolites
2.17 Zeolite synthesis from Coal Fly Ash
2.18 Methods of Zeolite Synthesis
3 Materials & Method
3.1 Introduction
3.1.1 SECTION A:Synthesis of Zeolite Different types of zeolites(Zeolite N-L,Zeolite Na-P1,Sodalite,Analcime)
3.2 Sample Collection & Preservation
3.3 Synthetic Procedure
3.4 Aging Step Phase One
3.4.1 Aging Step Phase Second
3.5 Hydrothermal Synthesis
3.6 Measurement Parameters
3.7 Material
3.8 Fusion
3.9 Crystalization step
3.10 XRD
3.11 Sample preparation and procedure
3.12 Determination of percentage crystallinity
3.13 Quantification of the zeolite phase
3.14 Quantitative XRD analysis
3.15 Sample preparation and procedure
3.16 X-ray Fluorescence spectrometry
3.17 Scanning Electron Microscopy
3.18 Atomic Absorption Spectroscopy (AAS)
4 RESULTS &DISCUSSIONS
4.1 Introduction
4.2 Chemical composition of the fly ashes
4.3 Mineralogical Analysis
4.4 XRD
4.5 Zeolite (Analcime)
4.5.1 Physical Properties of Analcime
4.6 Zeolite Sodalite
4.6.1 Physical Properties
4.7 X-ray Fluorescence Spectrometry
4.7.1 Results
4.8 Morphological Properties
4.9 Making Artifical Seawater
4.10 Atomic Absorption Spectroscopy
5 CONCLUSIONS
Recommendations and future work
Acknowledegement
References
本文编号：3441477
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