Table Of ContentPhotocatalysts in Advanced
Oxidation Processes for
Wastewater Treatment
Scrivener Publishing
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Beverly, MA 01915-6106
Publishers at Scrivener
Martin Scrivener ([email protected])
Phillip Carmical ([email protected])
Scrivener Publishing
100 Cummings Center, Suite 541J
Beverly, MA 01915-6106
Publishers at Scrivener
Martin Scrivener ([email protected]) Photocatalysts in Advanced
Phillip Carmical ([email protected])
Oxidation Processes for
Wastewater Treatment
Edited by
Elvis Fosso-Kankeu, Sadanand Pandey
and Suprakas Sinha Ray
This edition first published 2020 by John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ 07030, USA
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Library of Congress Cataloging-in-Publication Data
ISBN 978-1-119-63139-2
Cover image: Pixabay.Com
Cover design by Russell Richardson
Set in size of 11pt and Minion Pro by Manila Typesetting Company, Makati, Philippines
Printed in the USA
10 9 8 7 6 5 4 3 2 1
Contents
Preface xi
Part 1: Synthesis of Effective Photocatalysts 1
1 Biogenic Synthesis of Metal Oxide Nanoparticle
Semiconductors for Wastewater Treatment 3
Nkgaestsi M. Ngoepe, Mpitloane J. Hato, Kwena D. Modibane
and Nomso C. Hintsho-Mbita
1.1 Introduction 4
1.2 Classifications of Semiconductor Nanostructured Materials 6
1.2.1 Zinc Oxide (ZnO) Nanostructures 6
1.2.2 Titanium Dioxide Nanostructures 7
1.3 Biological Synthesis of ZnO and TiO Nanostructures 9
2
1.3.1 Synthesis of ZnO and TiO Using Bacteria 10
2
1.3.2 Preparation of ZnO and TiO from Plants 13
2
1.4 Photocatalytic Degradation of Dyes 17
1.5 Challenges of Photocatalysis 22
1.6 Conclusions: Future and Scope 23
Acknowledgments 24
References 24
2 Wastewater Treatment: Synthesis of Effective Photocatalysts
Through Novel Approaches 33
Tahira Qureshi, Monireh Bakhshpour, Kemal Çetin,
Aykut Arif Topçu and Adil Denizli
List of Abbreviations 34
2.1 Introduction 35
2.1.1 Miscellaneous Methods in Wastewater Treatment 36
2.1.2 Homogeneous Photo-Fenton for Wastewater
Treatment 38
2.1.3 Heterogeneous Photocatalysis Processes
for Wastewater Treatment 42
v
vi Contents
2.2 Synthesis of Photocatalytic Materials 44
2.2.1 Sol–Gel Synthesis 44
2.2.2 Hydrothermal Synthesis Process 46
2.2.3 Solvothermal Synthesis Process 47
2.2.4 Direct Oxidation Synthesis 48
2.2.5 Sonochemical Synthesis Method 48
2.2.6 Chemical Vapor Deposition Synthesis Method 49
2.2.7 Physical Vapor Deposition 50
2.2.8 Microwave Synthesis Process 51
2.2.9 Electrochemical Deposition Synthesis Process 52
2.3 Support Materials for Photocatalysis 53
2.3.1 Zeolites 53
2.3.2 Clays 54
2.3.3 Carbon Nanotubes (CNTs) 54
2.3.4 Additional Supports 55
2.4 Life Cycle Assessment of Photocatalytic Water
Treatment Processes 56
2.5 Summary 57
References 58
3 Metal–Organic Frameworks as Possible Candidates
for Photocatalytic Degradation of Dyes in Wastewater 65
Thabiso C. Maponya, Mpitloane J. Hato, Kwena D. Modibane
and Katlego Makgopa
3.1 Introduction 66
3.2 Wastewater Treatment Methods 67
3.3 Photocatalysis 69
3.3.1 Background 69
3.3.2 Photocatalysts for Wastewater Treatment 69
3.4 Metal–Organic Frameworks 71
3.4.1 History and Discovery of MOFs 72
3.4.2 Structure of Metal–Organic Frameworks 72
3.4.3 Preparation of Metal–Organic Frameworks 75
3.4.3.1 Hydro/Solvothermal Synthesis 75
3.4.3.2 Microwave-Assisted Synthesis 76
3.4.3.3 Mechanochemical Process 77
3.4.3.4 Post Synthesis 78
3.4.5 Applications 79
3.4.6 MOFs for Photocatalytic Degradation 79
3.5 Conclusions 83
Acknowledgments 83
References 84
Contents vii
Part 2: Mechanisms of the Photocatalytic
Degradation of Various Pollutants 93
4 Photocatalytic Degradation of Toxic Pesticides:
Mechanistic Insights 95
Akeem Adeyemi Oladipo, Mustafa Gazi,
Ayodeji Olugbenga Ifebajo, Adewale Sulaiman Oladipo
and Edith Odinaka Ahaka
4.1 Introduction 96
4.1.1 Global Production, Consumption, and Distribution
of Pesticides 97
4.1.2 Pesticide Remediation Technologies 98
4.2 Advanced Oxidation Processes 99
4.2.1 Heterogeneous Advanced Oxidation Processes 101
4.2.2 Homogeneous Advanced Oxidation Processes 102
4.3 Photobased Treatment Approaches for Pesticides 103
4.3.1 Photolytic Degradation of Pesticides 104
4.3.2 Photolytic Degradation of Pesticides Combined
With Oxidants 106
4.4 Photocatalytic Degradation of Pesticides 106
4.4.1 Metal Oxide Semiconductors for Photocatalytic
Degradation of Pesticides 114
4.4.2 Photocatalytic Degradation of Pesticides
by Metal–Organic Frameworks 124
4.5 Mechanistic Insights Into Photocatalytic Degradation
of Pesticides 128
4.6 Conclusions and Future Directions 131
References 132
5 Sustainable Photo- and Bio-Catalysts for Wastewater
Treatment 139
Nour Sh. El-Gendy and Hussein N. Nassar
5.1 Introduction 139
5.2 Natural Apatite and Its Applications 141
5.3 Natural Apatite as a Photo-Bio-Catalyst
for Wastewater Treatment 141
5.3.1 Photodegradation by Pure Apatite 142
5.3.2 Photodegradation by Titania/Apatite Nanocomposite 143
5.3.3 Photodegradation by Zinicate/Apatite
Nanocomposite 147
5.3.4 Photodegradation by Other Metal/Apatite
Nanocomposite 152
viii Contents
5.4 Photodegradation of Pharmaceutical Pollutants 157
5.5 Challenges and Opportunities 159
References 160
6 Recent Advancement in Visible-Light-Responsive
Photocatalysts in Heterogeneous Photocatalytic Water
Treatment Technology 167
Sadanand Pandey, Kotesh Kumar Mandari, Joonwoo Kim,
Misook Kang and Elvis Fosso-Kankeu
6.1 Introduction 168
6.1.1 Technologies for Dye Removal From Contaminated
Water 170
6.1.2 Photocatalysis 171
6.1.3 General Mechanism of Photocatalysis 172
6.1.4 Parameters Affecting the Photocatalytic
Degradation of Dyes 177
6.1.4.1 Influence of pH on Photocatalytic
Degradation of Dyes in Wastewaters 177
6.1.4.2 Crystal Composition and Catalyst Type 181
6.1.4.3 Pollutant Type and Concentration 183
6.1.4.4 Influence of Catalyst Loading 184
6.2 Conclusion and Future Research 186
Funding 187
Acknowledgments 187
References 187
7 Degradation Mechanism of Organic Dyes by Effective
Transition Metal Oxide 197
Barkha Rani, G Thamizharasan, Arpan Kumar Nayak
and Niroj Kumar Sahu
7.1 Introduction 198
7.2 Types of Dyes and Their Sources 198
7.3 Environmental Hazards 199
7.4 Conventional Dye Degradation Process 200
7.4.1 Coagulation/Flocculation Process 201
7.4.2 Membrane Separation Process 201
7.4.3 Ion Exchange Process 202
7.4.4 Adsorption on Activated Carbon 202
7.4.5 Advance Oxidation Process 202
7.5 Mechanism of Photocatalytic Dye Degradation 202
7.5.1 Adsorption Process 203
Contents ix
7.5.1.1 Langmuir Isotherm 203
7.5.1.2 Freundlich Isotherm 204
7.5.1.3 Temkin Isotherm 204
7.5.1.4 Dubinin Radushkevich Isotherm 205
7.5.2 Photocatalytic Dye Degradation 206
7.6 Nanomaterial Aspect for Dye Degradation Process 207
7.7 Transition Metal Oxide-Based Nanomaterials for Dye
Degradation 208
7.7.1 Co-Precipitation Process 210
7.7.2 Hydrothermal/Solvothermal Technique 211
7.7.3 Thermal Decomposition Process 211
7.8 Challenges and Future Scope 219
7.9 Conclusions 220
References 221
8 Factors Influencing the Photocatalytic Activity
of Photocatalysts in Wastewater Treatment 229
Rashi Gusain, Neeraj Kumar and Suprakas Sinha Ray
8.1 Introduction 230
8.2 Photocatalysis in Water Treatment 232
8.3 General Mechanism of Photocatalysis 233
8.4 Parameters Influencing Photocatalysis 235
8.4.1 Amount of Catalyst 235
8.4.2 Amount of Pollutant 235
8.4.3 Effect of pH 236
8.4.4 Effect of Oxidants 237
8.4.4.1 Effect of H O 239
2 2
8.4.4.2 Effect of KBrO 240
3
8.4.4.3 Effect of (NH ) S O and K S O 240
4 2 2 8 2 2 8
8.4.5 Effect of Temperature 241
8.4.6 Effect of Reaction Light Intensity 244
8.4.7 Effect of Doping 245
8.4.7.1 Noble Metal Doping 247
8.4.7.2 Metal Doping 248
8.4.7.3 Rare Earth Metal Doping 250
8.4.7.4 Non-Metallic Doping 251
8.4.7.5 Co-Doping 253
8.4.7.6 Self-Doping 253
8.4.8 Effect of Inorganic Ions 254
8.4.9 Effect of Size, Morphology, and Surface Area 255
8.5 Summary 257
