Ajay Kumar Mishra is currently working as an Associate Professor in the Department of Applied Chemistry, University of Johannesburg, South Africa. He also holds the position of Adjunct Professor at Jiangsu University, China. He is a group leader of research areas for composites/nanocomposites, water research, bio-inorganic chemistry, and nanochemistry.

• Preface xix Part 1: General 1 1 Nanotechnology and Water: Ethical and Regulatory Considerations 3Jillian Gardner and Ames Dhai 1.1 Introduction 3 1.2 Ethics and Nanotechnology  4 1.3 Legal and Regulatory Issues and Concerns Related to the Application of Nanotechnology in the Water Sector 14 1.4 Nanotechnology, Water and Human Health Research 17 1.5 Conclusion 18 References 19 2 Nanoparticles Released into Water Systems from Nanoproducts and Structural Nanocomposites Applications 21James Njuguna, Laura Gendre and Sophia Sachse 2.1 Introduction 21 2.2 Case Study on Polyurethane/Organically-Modified Montmorillonite  (PU/OMMT)  Nanofoam Nanoparticles in Water Suspension 23 2.3 Methodology 25 2.4 Results and Discussion 27 2.5 Conclusion 32 Acknowledgement 33 References 33 Part 2: Remediation 37 3 Prospects for Immobilization of Microbial Sorbents on Carbon Nanotubes for Biosorption: Bioremediation of Heavy Metals Polluted Water 39E. Fosso-Kankeu, A.F. Mulaba-Bafubiandi and A.K. Mishra 3.1 Dispersion of Metal Pollutants in Water Sources 40 3.2 Removal of Metal by Conventional Methods 41 3.3 Microbial Sorbents for Removal of Toxic Heavy Metals from Water 42 3.4 Immobilization of Microbial Sorbents on CNTs 50 3.5 Conclusion 54 References 54 4 Plasma Technology: A New Remediation for Water Purification with or without Nanoparticles 63Pankaj Attri, Bharti Arora, Rohit Bhatia, P. Venkatesu and Eun Ha Choi 4.1 Introduction 63 4.2 Water Purification Using Advanced Oxidation Processes (AOP) 64 4.3 Nanoparticle Synthesis Using Plasma and Its Application towards Water Purification 65 4.4 Application of Plasma for Water Purification 67 4.5 Combined Action of Nanoparticles and Plasma for Water Purification 73 4.6 Conclusion 74 References 75 5 Polysaccharide-Based Nanosorbents in Water Remediation 79R.B. Shrivastava, P. Singh, J. Bajpai and A.K. Bajpai 5.1 Introduction 80 5.2 Water Pollution 81 5.3 Hazardous Effects of Toxic Metal Ions 85 5.4 Technologies for Water Remediation 87 5.5 Shortcomings of the Technologies Used for Water Remediation 89 5.6 Nanotechnology 90 5.7 Polysaccharides 95 5.8 Advantages of Using Polysaccharides for Removal of Toxic Metal Ions 104 5.9 Brief Review of the Work Done 106 References 107 Part 3: Membranes & Carbon Nanotubes 115 6 The Use of Carbonaceous Nanomembrane Filter for Organic Waste Removal 117Farheen Khan, Rizwan Wahab, Mohd. Rashid, Asif Khan, Asma Khatoon, Javed Musarrat and Abdulaziz A.Al-Khedhairy 6.1 Introduction 118 6.2 Organic Wastes and Organic Pollutant 120 6.3 Low-Cost Adsorbents 123 6.4 Heavy Metals 124 6.5 Composite Materials 127 6.6 Carbonaceous Materials 128 6.7 Experimental 132 6.8 Nanomaterials 136 6.9 Summary and Future Directions 139 References 139 7 Carbon Nanotubes in the Removal of Heavy Metal Ions from Aqueous Solution 153M.A. Mamo and A.K. Mishra 7.1 Introduction 153 7.2 Synthesis of CNTs 155 7.3 Functionalization of Carbon Nanotubes 155 7.4 Adsorption of Heavy Metal Ions on Carbon Nanotubes 160 7.5 Competitive Adsorption 165 7.6 Summary and Conclusion 168 References 168 8 Application of Carbon Nanotube-Polymer Composites and Carbon Nanotube-Semiconductor Hybrids in Water Treatment 183G. Mamba, X.Y. Mbianda and A.K. Mishra 8.1 Introduction 183 8.2 Classification of Dyes 184 8.3 Conventional Treatment Technologies for Textile Effluent 190 8.4 Conclusion 220 Acknowledgements 221 References 222 9 Advances in Nanotechnologies for Point-of-Use and Point-of-Entry Water Purification 229Sabelo Dalton Mhlanga and Edward Ndumiso Nxumalo 9.1 Introduction 230 9.2 Nanotechnology-Enabled POU/POE Systems for Drinking Water Treatment 233 9.3 Absorptive Nanocomposites Polymers Based on Cyclodextrins 235 9.4 Nanotechnology-Based Membrane Filtration 244 9.5 Ceramic-Based Filters and Nanofibers 254 9.6 Challenges and Opportunities 259 References 262 Part 4: Nanomaterials 269 10 Mesoporous Materials as Potential Absorbents for Water Purification 271Ephraim Vunain and Reinout Meijboom 10.1 Introduction 271 10.2 Generalized Synthesis of Mesoporous Materials 272 10.3 Common Method of Synthesizing Silicate Mesoporous Molecular Sieves 276 10.4 Adsorption of Heavy Metals 280 10.5 Conclusions 282 References 283 11 Removal of Fluoride from Potable Water Using Smart  Nanomaterial as Adsorbent 285Dinesh Kumar and Vaishali Tomar 11.1 Introduction 286 11.2 Technologies for Defluoridation 289 11.3 Conclusions 303 Acknowledgement 303 References 303 12 Chemical Nanosensors for Monitoring Environmental Pollution 309Sadanand Pandey and Shivani B Mishra 12.1 Introduction 309 12.2 Conclusion 325 12.3 Challenges and Future Prospect 326 Acknowledgements 327 References 327 13 Reduction of 4-Nitrophenol as a Model Reaction for Nanocatalysis 333Jihyang Noh and Reinout Meijboom 13.1 Introduction 333 13.2 Kinetic Evaluation and Mechanism of 4-NP Reduction 337 13.3 Effect of Various Conditions 360 13.4 Synthetic Methods of Metal Nanocomposites and Their 4-NP Catalysis 364 13.5 Conclusion 395 References 395 Part 5: Water Treatment 407 14 Doped Diamond Electrodes for Water Treatment 409Qingyi Shao, Guangwen Wang, Cairu Shao, Juan Zhang and Shejun Hu 14.1 Introduction 410 14.2 Calculation Method 414 14.3 Calculation Results and Discussions 416 14.4 Conclusions 428 References 430 15 Multifunctional Silver, Copper and Zero Valent Iron Metallic Nanoparticles for Wastewater Treatment 435S.C.G. Kiruba Daniel, S. Malathi, S. Balasubramanian, M. Sivakumar and T. Anitha Sironmani 15.1 Introduction 436 15.2 Metal Nanoparticles and Microbial Inactivation 437 15.3 Metal Nanoparticles for Heavy Metal and Dye Removal 441 15.4 Multifunctional Hybrid Nanoparticles – Ag, Cu and ZVI 443 15.5 Mechanism of Action 445 15.6 Concluding Remarks and Future Trends 448 Acknowledgement 448 References 448 16 Iron Oxide Materials for Photo-Fenton Conversion of Water Pollutants 459S.A.C. Carabineiro, A.M.T. Silva, C.G. Silva, R.A. Segundo, P.B. Tavares, N. Bogdanchikova, J.L. Figueiredo and J.L. Faria 16.1 Introduction 460 16.2 Experimental 461 16.3 Results and Discussion 463 16.4 Conclusions 471 Acknowledgments 472 References 472 17 Nanomaterials with Uniform Composition in Wastewater Treatment and Their Applications 475Farheen Khan and Rizwan Wahab 17.1 Introduction 476 17.2 Experimental 488 17.3 Effects of Pollutants on Health and the Environment 490 17.4 Summary and Future Directions 499 References 500 Index 513

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