论文目录 | |
| Acknowledgements | 第1-5页 |
| Abstract | 第5-6页 |
| 摘要 | 第6-7页 |
| Abbreviations | 第7-14页 |
| Chapter 1-Literature Review | 第14-35页 |
| 1.1 Overview of chromium | 第14页 |
| 1.2 General transport and fate of chromium in environment | 第14-19页 |
| 1.2.1 Cr in the atmosphere | 第15页 |
| 1.2.2 Cr in the surface water | 第15-16页 |
| 1.2.3 Cr contamination in soil | 第16-17页 |
| 1.2.4 The occurrence of Cr(Ⅵ) in wastewater | 第17-18页 |
| 1.2.5 Other environmental sources of Cr | 第18-19页 |
| 1.3 Standards and regulations for Cr exposure | 第19-21页 |
| 1.3.1 OSHA | 第20页 |
| 1.3.2 NIOSH | 第20页 |
| 1.3.3 USEPA | 第20-21页 |
| 1.3.4 ISI | 第21页 |
| 1.4 The treatment technology of Cr(Ⅵ) from wastewater | 第21-32页 |
| 1.4.1 Chemical reduction-precipitation | 第21-22页 |
| 1.4.2 Ion exchange | 第22页 |
| 1.4.3 Adsorption | 第22-25页 |
| 1.4.3.1 Adsorption by activated carbon | 第23页 |
| 1.4.3.2 Adsorption by other adsorbents | 第23-25页 |
| 1.4.4 Bioremediation | 第25-32页 |
| 1.4.4.1 Removal of Cr(Ⅵ) from wastewater by bacteria | 第26-28页 |
| 1.4.4.2 Removal of Cr(Ⅵ) from wastewater by fungi | 第28页 |
| 1.4.4.3 Removal of Cr(Ⅵ) from wastewater by microalgae | 第28-32页 |
| 1.5 Co-contamination of Cr(Ⅵ) with organics and removal by living heterotrophicmicroalgae | 第32-34页 |
| 1.6 Objectives of the study | 第34-35页 |
| Chapter 2-Materials and Methods | 第35-41页 |
| 2.1 Microalgal strains and reagents | 第35-36页 |
| 2.2 Microalgae cultivation for Cr(Ⅵ) removal | 第36-37页 |
| 2.3 Analytical methods | 第37-39页 |
| 2.4 Characteristics of microalgal biomass upon addition of Cr(Ⅵ) | 第39页 |
| 2.5 Distribution details of chromium | 第39-40页 |
| 2.6 Statistical analysis | 第40-41页 |
| Chapter 3-Results and Discussion | 第41-63页 |
| 3.1 Adaption of heterotrophic microalgae to the Cr(Ⅵ) | 第41-42页 |
| 3.2 Effect of initial Cr(Ⅵ) concentration on Cr (total Cr, Cr(Ⅵ), Cr(Ⅲ)) removal | 第42-44页 |
| 3.3 Effect of initial Cr(Ⅵ) concentration on growth: growth inhibition vs. growthenhancement | 第44-45页 |
| 3.4 Effect of pH on Cr(Ⅵ) removal and microalgal growth in presence absence of Cr(Ⅵ) | 第45-47页 |
| 3.5 Effect of initial biomass concentration on growth and Cr(Ⅵ) removal | 第47-49页 |
| 3.6 Effect of different organic compounds on biomass growth and Cr(Ⅵ) removal byheterotrophic microalgae | 第49-53页 |
| 3.6.1 Algal growth feature | 第49-51页 |
| 3.6.2 Cr(Ⅵ) removal performance | 第51-53页 |
| 3.7 C/N/P removal by heterotrophic microalgae in circumstance of Cr(Ⅵ) | 第53-57页 |
| 3.8 Fate of Cr in the heterotrophic microalgae wastewater treatment system | 第57-61页 |
| 3.8.1 Identification of the immobilized chromium on the algal biomass | 第57-60页 |
| 3.8.2 Distribution of Cr in the biological system | 第60-61页 |
| 3.9 Mechanism for the bioremoval of Cr(Ⅵ) by heterotrophic microalgae | 第61-63页 |
| Chapter 4-Conclusions and Prospect | 第63-65页 |
| 4.1 Conclusions | 第63-64页 |
| 4.2 Prospect | 第64-65页 |
| References | 第65-79页 |
