| 摘要 | 第1-10页 |
| ABSTRACT | 第10-19页 |
| Chapter 1 Introduction | 第19-24页 |
| ·Significance, Objective and Research Tasks | 第19-22页 |
| ·Research Scope and Organization | 第22-24页 |
| Chapter 2 Aqueous environmental geochemistry of uranium and applications of ironnanoparticles | 第24-52页 |
| ·Aqueous Uranium Geochemistry | 第24-44页 |
| ·Uranium aqueous speciation | 第26-31页 |
| ·Uranium sorption | 第31-36页 |
| ·Uranium reduction | 第36-44页 |
| ·Iron Nanoparticles and the Application for Site Remediation | 第44-49页 |
| ·Characterization of Iron Nanoparticles | 第45-46页 |
| ·Applications for Site Remediation | 第46-49页 |
| ·Uranium(Ⅵ) reduction by Zero-valent iron | 第49-52页 |
| Chapter 3 Kinetics of U(Ⅵ) removal and reduction by nano Fe~0 under differentconditions | 第52-68页 |
| ·Introduction | 第52-53页 |
| ·Materials and Methods | 第53-55页 |
| ·Materials | 第53-54页 |
| ·Experimental procedure and analytical method | 第54-55页 |
| ·Results | 第55-60页 |
| ·Characteristics of synthetic nano Fe~0 | 第55页 |
| ·U(Ⅵ) removal by nano Fe~0 | 第55-58页 |
| ·U(Ⅵ) reduction by nano Fe~0 | 第58-60页 |
| ·Discussion | 第60-68页 |
| ·The rate of U(Ⅵ) removal and reduction | 第60-63页 |
| ·Modeling U(Ⅵ) reduction | 第63-67页 |
| ·Environmental Implications | 第67-68页 |
| Chapter 4 Influences of iron complexing reagents, aqueous and sorbed Fe(Ⅱ) onU(Ⅵ) reduction by nano Fe~0 | 第68-82页 |
| ·Introduction | 第68-69页 |
| ·Materials and Methods | 第69-72页 |
| ·Materials | 第69-70页 |
| ·Experimental procedure and analytical method | 第70-72页 |
| ·Results | 第72-79页 |
| ·Effect of pH on U(Ⅵ) removal and reduction by nano Fe~0 | 第72-74页 |
| ·Effects of 1,10-phenanthroline and triethanolamine on U(Ⅵ) removal and reduction by nano Fe~0 | 第74-78页 |
| ·Interactions between aqueous/sorbed Fe(Ⅱ) and U(Ⅵ) | 第78-79页 |
| ·Discussion | 第79-81页 |
| ·Role of Fe(Ⅱ) and Fe(Ⅲ) on U(Ⅵ) reduction by nano Fe~0 | 第79-80页 |
| ·Reaction mechanism for U(Ⅵ) reduction by nano Fe~0 | 第80-81页 |
| ·Environmental Implications | 第81-82页 |
| Chapter 5 Reaction products, effects of temperature and nano Fe~0 types on U(Ⅵ)reduction | 第82-99页 |
| ·Introduction | 第82-83页 |
| ·Materials and Methods | 第83-88页 |
| ·Materials | 第83-85页 |
| ·Experimental procedure and analytical method | 第85-88页 |
| ·Results | 第88-96页 |
| ·Reaction products and the reoxidation of reduced uranium | 第88-90页 |
| ·Temperature dependence | 第90-92页 |
| ·U(Ⅵ) removal and reduction by different types of nano Fe~0 | 第92-96页 |
| ·Discussion | 第96-99页 |
| ·Temperature dependence of U(Ⅵ) reduction rate constants | 第96-98页 |
| ·Environmental Implications | 第98-99页 |
| Chapter 6 Conclusions | 第99-105页 |
| ·Summary of Experimental Work | 第99-102页 |
| ·U(Ⅵ) removal by nano Fe~0 | 第99-100页 |
| ·U(Ⅵ) reduction by nano Fe~0 | 第100-102页 |
| ·Environmental Implications | 第102-103页 |
| ·Reductive Immobilization of U(Ⅵ) by nano Fe~0 | 第102页 |
| ·The stability of reduced uranium | 第102-103页 |
| ·Suggestions for Future Research | 第103-105页 |
| ·Extension to different materials and solution compositions | 第103-104页 |
| ·Extension to field environment | 第104-105页 |
| Acknowledgments | 第105-106页 |
| References | 第106-124页 |
| Appendix | 第124页 |
