| 摘要 | 第1-6页 |
| Abstract | 第6-12页 |
| Introduction | 第12-13页 |
| 1 Literature Review | 第13-19页 |
| ·Status of heavy metal contamination | 第13-15页 |
| ·Common heavy metals | 第15-17页 |
| ·Hazardous effects of heavy metals on human health | 第17-19页 |
| 2 Material and Methods | 第19-21页 |
| ·Location of study | 第19页 |
| ·Sampling and processing of soils and vegetables | 第19页 |
| ·Pretreatment and Analysis | 第19-20页 |
| ·Digestion and Analysis | 第20页 |
| ·Statistics analysis | 第20-21页 |
| 3 Results and Analyses | 第21-49页 |
| ·Heavy metals content of soil from eight districts and analyze | 第21-22页 |
| ·Differences of heavy metals of soil under different districts | 第22-24页 |
| ·Effects of soil properties on heavy metals accumulation in vegetables | 第24-49页 |
| ·Effects of soil properties on Zn accumulation in vegetables | 第24-28页 |
| ·Effects of soil properties on Cd accumulation in vegetables | 第28-33页 |
| ·Effects of soil properties on Cr accumulation in vegetables | 第33-38页 |
| ·Effects of soil properties on Cu accumulation in vegetables | 第38-43页 |
| ·Effects of soil properties on Pb accumulation in vegetables | 第43-49页 |
| 4 Conclusion and discussion | 第49-56页 |
| ·Heavy metals content and properties of soil from eight districts and analyze | 第49页 |
| ·Differences of heavy metals of soil under different districts | 第49-50页 |
| ·Effects of soil properties on heavy metals accumulation in vegetables | 第50-56页 |
| ·Effects of soil properties on Zn accumulation in vegetables | 第50-51页 |
| ·Effects of soil properties on Cd accumulation in vegetables | 第51-52页 |
| ·Effects of soil properties on Cr accumulation in vegetables | 第52-53页 |
| ·Effects of soil properties on Cu accumulation in vegetables | 第53-54页 |
| ·Effects of soil properties on Pb accumulation in vegetables | 第54-56页 |
| Acknowledgments | 第56-57页 |
| References | 第57-63页 |
| 攻读学位期间的研究成果 | 第63页 |
