| .大生物量植物治理重金属重度污染废弃地可行性的研究[J].农业环境科学学报,2013,32(3):. |
| 大生物量植物治理重金属重度污染废弃地可行性的研究 |
| A Field Experiment on Phytoextraction of Heavy Metals from Highly Contaminated Soil Using Big Biomass Plants of Sauropus androgynus and Manihot sp. |
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| DOI：10.11654/jaes.2013.03.024 |
| 中文关键词: 天绿香 木薯 重金属污染 植物修复 |
| 英文关键词: Sauropus androgynus Manihot sp. heavy metals contamination phytoremediation |
| 基金项目: |
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| 摘要点击次数: 2704 |
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| 中文摘要: |
| 研究在重金属Cd、Cu、Pb和Zn重度污染的矿山废弃地上种植天绿香和木薯，探讨利用天绿香和木薯治理重金属污染废弃农田的可行性。实验结果表明，通过种植天绿香和木薯均可实现对土壤中各重金属有效地提取。其中天绿香生物量可达10.07 t·hm-2，对4种重金属的提取每年每公顷可分别达到19 710 g Zn, 64.40 g Cd，144.52 g Cu和1760 g Pb；木薯生物量可达12.6 t·hm-2，对4种重金属的提取每年每公顷可分别达到11 095.45 g Zn, 30.58 g Cd，712.07 g Cu和2 174.69 g Pb。天绿香和木薯既可对重金属进行提取，同时还可作为能源植物实现对重金属污染废弃农田的复垦，天绿香和木薯是原位修复重金属污染农田的可行性材料。 |
| 英文摘要: |
| Heavy metals soil contamination is an important issue both in scientific research and practice. Farmland contamination of heavy metals has been much concerned due to potential human health risk. Hyperaccumulators are generally considered as phytoextraction plants because of their exceptionally large concentrations of metals in biomass without phytotoxicity symptoms. However, application of hyperaccumulator is limited by low biomass and environmental adaptability. In order to identify the potential of S.androgynus and cassava to remediation heavy metals contaminated land in Dabaoshan region. An experiment was set for S.androgynus and Manihot sp.（cassava）at a highly contaminated land by heavy metals（Cd, Cu, Pb and Zn） in this area. To determine the potential of S. androgynus and cassava to extract heavy metals, while and the potential economic income of cassava cultivation will be helpful to assess the value of reclamation seriously heavy metals contaminated soils. Results showed that S. androgynus and cassava could grow well and produce high biomass at the site. The plants extracted much heavy metal from soil due to their great biomass and relative high bioconcentration of metals in plants tissues. Comparing with hyperaccumulator Thlaspi caerulescens, S.androgynus and cassava were lower to extract Cd, but were much higher to extract Cu and Zn. In other hand, cassava was simultaneously an economic bioenergy plant easy to cultivate. The two plants could be used to reclaim heavy metals contaminated land in situ. |
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