發(fā)布時間：2021-12-30 04:14

　　生物炭是由生物質(zhì)在限氧或缺氧條件下熱解而得的一種固態(tài)、富炭的材料。由于其在固碳、提高土壤肥力、以及固定污染物方面的能力,生物炭作為一種土壤改良劑受到研究者的廣泛關(guān)注。然而,以不同制備技術(shù)或改性方法制備的生物炭的微孔形成機制,以及微孔、炭組成（非聚合態(tài)芳香族炭）在有機污染物吸附中的作用仍然少有關(guān)注。因此,本文通過不同制備技術(shù)或改性方法,在不同溫度下分別制備了生物炭或改性生物炭,研究了它們的理化性質(zhì)與其熱解機制之間的關(guān)系,調(diào)查了原始生物炭和改性生物炭對環(huán)境有機污染物卡馬西平（CBZ）和雙酚A（BPA）的吸附,并就其相關(guān)吸附機制進行了初步討論。本文的主要結(jié)論如下:（1）微波輻射（MW）是一種有效的熱解制備技術(shù)。本研究比較了MW法和電熱裂解（FN）法制備的生物炭的理化性質(zhì)。在相同的裂解溫度下,MW生物炭保留了更多的有機質(zhì)成分（正如MW生物炭更高的產(chǎn)率和豐富的官能團所證明）。而且由于其具有較豐富的微孔,MW生物炭具有較大的比表面積�？偟膩碚f,與FN生物炭相比,MW生物炭對CBZ和BPA具有較強的吸附能力。然而,通過單點吸附系數(shù)-比表面積標(biāo)準(zhǔn)化,單位面積上MW生物炭的吸附量比FN生物炭上的吸附量低... 

【文章來源】：昆明理工大學(xué)云南省

【文章頁數(shù)】：132 頁

【學(xué)位級別】：博士

【文章目錄】：
Abstract
摘要
Chapter 1. Introduction
    1.1 Background and significance
    1.2 Objectives of the study
    1.3 Contents of the study
    1.4 The organization of this dissertation
    1.5 The innovation of this thesis
    1.6 Key issues need to be discussed in this study
Chapter 2. Literature review
    2.1 The introduction of biochar
    2.2 The properties of biochars
        2.2.1 Preparation
        2.2.2 Properties
    2.3 Interaction of biochar with contaminants
        2.3.1 Organic contaminants
        2.3.2 Heavy metals
    2.4 Biochar modification
        2.4.1 Physical modification
        2.4.2 Chemical modification
Chapter 3. Physi-chemical and sorption properties of biochars prepared by electrothermal pyrolysis and microwave irradiation
    3.1 Introduction
    3.2 Materials and methods
        3.2.1 Materials
        3.2.2 Biochar preparation
        3.2.3 Characterization of FN and MW biochars
        3.2.4 Sorption experiments
        3.2.5 Data analyses
    3.3 Results and Discussion
        3.3.1 The comparison of physical and chemical properties of biochars produced through MW and FN methods
        3.3.2 Morphology observation of biochars produced through MW and FN methods
        3.3.3 Free radicals detected in biochars produced through MW and FN methods
        3.3.4 Sorption isotherms of CBZ and BPA on MW and FN biochars
        3.3.5 Sorption kinetics of CBZ and BPA
    3.4 Summary
Chapter 4. Phosphoric acid pretreatment enhances the specific surface areas of biochars by generation of micropores
    4.1 Introduction
    4.2 Methods and Materials
        4.2.1 Materials
        4.2.2 Preparation of biochars, biochars-H, and raw materials -H
        4.2.3 Characterization of biochars, biochars-H, and raw materials -H
        4.2.4 Batch sorption experiment
        4.2.5 Data analysis
    4.3 Results and Discussion
        4.3.1 Pore structure development
        4.3.2 Elemental composition analysis
        4.3.4 FTIR analysis of BCPS, BCPS-H, and PS-H
        4.3.5 The total P content of BCPS, BCPS-H, and PS-H before and after washing
        4.3.6 The ash content of BCPS, BCPS-H, and PS-H before and after washing
        4.3.7 Sorption of CBZ and BPA
    4.4 Summary
Chapter 5. The relative importance of different carbon structures to organic contaminant sorption in biochars
    5.1 Introduction
    5.2 Materials and Methods
        5.2.1 Materials
        5.2.2 Preparation and bleaching of biochars
        5.2.3 Characterization of original and bleached biochars
        5.2.4 Batch sorption ecperiment
        5.2.5 Data analysis
    5.3 Results and Discussion
        5.3.1 Thermal stability of biochars
        5.3.2 13C NMR spectra of original and bleached biochars
        5.3.3 Elemental composition and porous structure of biochars
        5.3.4 XPS analysis
        5.3.5 Raman analysis
        5.3.6 FTIR spectra
        5.3.7 Sorption of CBZ and BPA
    5.4 Summary
Chapter 6. Conclusion and prospect
    6.1 Conclusion
    6.2 Prospective
Acknowledgements
References
Appendix A List of publications and prizes
Appendix B List of symbols and abbreviations
Appendix C 中文梗概



本文編號：3557453