论文目录 | |
| ACKNOWLEDGEMENTS | 第1-10
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| LIST OF TABLES | 第10-11
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| LIST OF FIGURES | 第11-12
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| ABSTRACT | 第12-14
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| ABSTRACT(IN CHINESE) | 第14-16
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| CHAPTER 1 Introduction | 第16-21
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| · Research problem | 第16-17
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| · Research objectives | 第17-19
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| · Hypothesis | 第19-21
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| CHAPTER 2 Literature Review | 第21-34
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| · Heavy metal toxicity in plants | 第21-28
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| · Chromium in the environment | 第21-22
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| · Sources and phytotoxic effects of Cr | 第22-23
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| · Chromium uptake,translocation and accumulation in plants | 第23-24
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| · Cadmium and phytotoxicity | 第24-26
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| · Lead and phytotoxicity | 第26-27
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| · Copper and phytotoxicity | 第27-28
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| · Remediation of metal polluted soil | 第28-29
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| · Phytoextraction | 第29-32
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| · Natural or continuous phytoextraction using hyperaccumulators | 第30-31
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| · Artificial or chemically enhanced phytoextraction using chelating agents | 第31-32
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| · Wetland plants | 第32
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| · Cattails | 第32-34
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| CHAPTER 3 Evaluation of T.angustifolia for Cr toxicity tolerance and its possible role in phytoremediation | 第34-45
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| · Introduction | 第34-37
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| · Materials and methods | 第37-38
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| · Results | 第38-43
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| · Plant height and biomass | 第38-39
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| · SOD,POD activities and MDA content | 第39-42
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| · Four microelement concentrations | 第42-43
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| · Correlations between Cr and four microelements | 第43
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| · Discussion | 第43-45
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| CHAPTER 4 Comparison of EDTA and citric acid- enhanced phytoextraction of heavy metals in artificially metal contaminated soil by T.angustifolia | 第45-62
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| · Introduction | 第46-48
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| · Materials and methods | 第48-51
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| · Soil collection and artificial heavy metal contamination | 第48-49
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| · Plant materials and chelator treatments | 第49-50
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| · Sampling and measurements | 第50
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| · Soil metal dissolution and as affected by chelators | 第50
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| · Statistical analysis | 第50-51
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| · Results | 第51-59
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| · Effect of chelator addition on plant biomass of T.angustifolia | 第51
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| · Effect of chelators on tissue metal concentration of T.angustifolia plants | 第51-57
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| · Effect of chelators on metal accumulation by plants | 第57
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| · Effects of chelator addition on metal solubility in soil | 第57-59
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| · Discussion | 第59-62
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| References | 第62-74
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