隨著社會經(jīng)濟和工業(yè)發(fā)展,粉煤灰的無序堆放對環(huán)境污染越來越嚴(yán)重,其對大氣、土壤、地下水的污染對人類的健康也造成了一定的威脅。利用粉煤灰作為合成沸石分子篩的原材料,不僅可以為被鍶、銫等污染的海水吸附凈化提供一種價格低廉、性能良好的吸附劑,同時也實現(xiàn)了粉煤灰以廢治廢的資源化利用,有助于減輕粉煤灰造成的環(huán)境問題。本文以內(nèi)蒙古托克托縣大唐國際粉煤灰為主要原料,采用堿熔融水熱法制備沸石分子篩,研究了合成過程中堿灰比、陳化時間、水熱晶化溫度、水熱晶化時間等試驗條件對合成產(chǎn)物的影響,并對試驗合成的產(chǎn)物進(jìn)行了表征。掃描電鏡（SEM）可觀察到產(chǎn)物中屬于粉煤灰中的球狀、鈍角狀、不規(guī)則碎屑狀顆�；鞠�,合成產(chǎn)物具有N-1型沸石、Na-P1型、方鈉石、方沸石典型結(jié)構(gòu),形狀規(guī)則,輪廓清晰,分散度較好;X射線衍射（XRD）圖譜表明,合成產(chǎn)物具有N-1型沸石、Na-P1型、方鈉石、方沸石較強的衍射峰,表明由粉煤灰在適當(dāng)?shù)脑囼灄l件下成功的合成了混合相分子篩。選取含有Cs+、Sr2+的模擬污染海水為處理目標(biāo),研究制備的混合相沸石分子篩對Cs+、Sr2+的吸附性能。初步探討了 Cs+、Sr2+離子濃度、pH、吸附時間、吸... 

【文章來源】：西南科技大學(xué)四川省

【文章頁數(shù)】：66 頁

【學(xué)位級別】：碩士

【文章目錄】：
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



本文編號：3441477