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| 百花湖沉积物与修复植物中重金属形态的初步分析 |
| Analysis of the Heavy Metal Speciation in Plants and Sediments in Baihua Lake by Phytoremediation |
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| DOI： |
| 中文关键词: 重金属形态 植物修复 黑麦草 紫花苜蓿 沉积物 百花湖 |
| 英文关键词: Heavy metal fraction Phytoremediation Lolium multiflorum Lam Medicago sativa L Sediments Baihua Lake |
| 基金项目:贵州省科技支撑计划“两湖一库底泥重金属迁移转化规律、生态风险评价及生态修复技术研究”基金资助项目［黔科合SY字（2011）3079］；贵阳市科学技术计划“两湖一库沉积物磷和重金属的释放机制与原位控制技术研究”基金资助项目［（2010）筑科农合同字第5-2号］ |
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| 中文摘要: |
| 选用黑麦草（Lolium multiflorum Lam.）和紫花苜蓿（Medicago sativa L.）做盆栽试验，研究百花湖表层沉积物与植物体中重金属Cu、Zn、Cd的形态分布特征。结果表明：沉积物经植物修复后，3种重金属的可交换态均有所减少，而铁/锰态均有不同程度的增加，说明植物生长对重金属形态变化具有一定的影响；在2种植物体中，茎叶中的Cu主要以活性较高的水提取态存在，Zn主要以活性较低的醋酸提取态存在，Cd以氯化钠提取态为优势形态；相关性分析表明，黑麦草根部Cu的总量与沉积物中Cu的总量及可交换态和残渣态呈现显著的正相关，紫花苜蓿中Zn的总量与沉积物中Zn的不同形态有正或负的相关性。 |
| 英文摘要: |
| Pot experiments of Lolium multiflorum Lam. and Medicago sativa L. were conducted to study the phytoremediation of heavy metal (Cu、Zn、Cd) contaminated sediment in Baihua Lake. Results were: After phytoremediation, three kinds of heavy metalsion exchangeable form in sediment decreased, but Fe-Mn oxide form increased in different levels. The growth of plants had certain activation on heavy metal fraction changes. In stems and leaves of the two plants, Cu mainly existed as water extractable form with high activity, Zn existed as acetic acid extractable form with low activity, and Cd existed as NaCl extractable form. Comparing the two kinds of plants, Medicago sativa L. accounted for a larger proportion. There was a significant positive correlation between the total amount of Cu in the root of Lolium multiflorum Lam. and the total amount of Cu in sediment. |
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