声明
ABSTRACT
摘要
Contents
Chapter 1-Introduction
1．1．General introduction and historical background
1．2．Conventional sludge disposal methods and limitations
1．3．Scope of sludge biochar as catalysts
1．4．Synthesis routes and characteristics of sludge biochar
1．4．1．Pyrolysis method
1．4．2．Microwave digestion method
1．4．3．Hydrothermal carbonization method
1．5．Environmental Application of sludge biochar as catalysts
1．5．1．Oxidative degradation of organic pollutants
1．5．2．Employed as Microbial Fuel Cell electrode materials
1．6．Knowledge gaps and outlook
1．7．Overall obj ectives of the study
Chapter 2-Catalysts’ characterization methods
2．1．Morphology analysis
2．2．Crystallinity analysis
2．3．Surface textural properties analysis
2．4．Chemical composition analysis
2．5．Optical sensitivity analysis
2．6．Magnetic properties analysis
2．7．Thermal stability analysis
2．8．Carbon defects analysis
2．9．Electron paramagnetic resonance analysis
2．10 adsorption capacity measurement
2．11．Summary
Chapter 3-Sewage sludge-derived TiO2／Fe／Fe3C-biochar composite as heterogeneous Fenton-like catalyst for degradation of methylene blue
3．1．Introduction
3．2．Experimental section
3．2．1．Materials and chemicals
3．2．2．Preparation of sludge—deriVed Ti02／Fe，Fe3C-biochar composite
3．2．3．Experiments for Fenton-like reaction
3．3．ResulIs and discussion
3．3．1．Influence of Ti／Fe integration on sludge bioehar properties
3．3．2．Performance of catalysts in fenton-like reaction
3．3．3．Mechanisms of Fenton-like reactions and subsequent degradation of MB
3．4．Summary
Chapter 4-Sludge-derived MnOx-N-biochar as an efficient catalyst for peroxymonosulfate activation
4．1．Introduction
4．2．Experimental section
4．2．1．Raw material
4．2．2．Preparation of sludge-derived MnOx-N-biochar
4．2．3．Experiments for Peroxymonosulfate activation
4．3．Results and discussion
4．3．1．Influence of Mn integration and NH40H treatment on sludge bioeharproperties
4．3．2．Performance of catalyst in activating PMS and oxidative degradation ofpollutants
4．3．3．Mechanisms of PMS activation and degradation ofA07
4．4．Summary
Chapter 5-Effects of chemical treatment on peroxymonosulfate activation efficiency of sludge biochar—based catalysts：Understanding the active sites and mechanisms
5．1．Introduction
5．2．Experimental section
5．2．1．Collection and preparation of materials
5．2．2．Preparation of chemically modified SBCs
5．2．3．Experiments for Peroxymonosulfate activation
5．3．Results and discussion
5．3．1．Influence of thermal and chemical treatment on sludge biochar properties
5．3．2．Performance of catalyst in activating PMS and oxidative degradation of orgamcs
5．3．3．Identifying catalytically active sites and their roles in oxidation
5．3．4．Reproducibility analysis
5．4．Summary
Chapter 6-Sewage sludge and Melamine-blended biochar as a robust heterogeneous catalyst for peroxymonosulfate activation：enhancement of N-functionality and catalytic mechanisms
6．1．Introduction
6．2．Experimental section
6．2．1．Chemicals and materials
6．2．2．Preparation of sludge and Melamine-blended biochar
6．2．3．Experiments for Peroxymonosulfate activation
6．3．Results and discussion
6．3．1．Influence of melamine integration on sludge bioehar physiochemiealproperties
6．3．2．Catalytic performance of the biochar as a PMS activator
6．3．3．Comparison of catalytic Performance
6．3．4．Mechanisms of PMS activation and subsequent degradation of RB
6．4．Summary
Chapter 7-Major Conclusions and Innovations
7．1．Major Conclusions
7．1．2． Sludge-derived MnOx-N-biochar as an efficient catalyst for peroxymonosulfate activation
7．1．3．Effects of chemical treatment on peroxymonosulfate activation efficiency of sludge biochar-based catalysts
7．2． Innovations
References
Appendix
Acknowledgements
中国科学技术大学;
