| 三叶草对污染土壤中芘的去除研究 |
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| 作者姓名： | XU Sheng-You CHEN Ying-Xu LIN Kuang-Fei CHEN Xin-Cai LIN Qi LI Feng WANG Zhao-Wei |
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| 作者单位： | XU Sheng-You(Department of Environmental Engineering,Zhejiang University,Hangzhou 310029 China;College of Life and Environment,Huangshan University,Huangshan 245041 China;School of Resource and Environmental Engineering,East China University of Science and Technology,Shanghai 200237 China);CHEN Ying-Xu(Department of Environmental Engineering,Zhejiang University,Hangzhou 310029 China;College of Life and Environment,Huangshan University,Huangshan 245041 China;);LIN Kuang-Fei(School of Resource and Environmental Engineering,East China University of Science and Technology,Shanghai 200237 China);CHEN Xin-Cai,LIN Qi,LI Feng,WANG Zhao-Wei(Department of Environmental Engineering,Zhejiang University,Hangzhou 310029 China)
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| 基金项目： | 国家自然科学基金，中国博士后科研基金，Postdoctoral Science Foundation of Shanghai Municipality;China，国家高技术研究发展计划(863计划) |
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| 摘 要： | Phytoremediation has been used as an emerging technology for remediation of soil contamination with polycyclic aromatic hydrocarbons (PAHs), ubiquitous persistent environmental pollutants derived from natural and anthropogenic processes, in the last decade. In this study, a pot experiment was conducted to investigate the potential of phytoremediation of pyrene from spiked soils planted with white clover (Trifolium repens) in the greenhouse with a series of pyrene concentrations ranging from 4.22 to 365.38 mg kg-1. The results showed that growth of white clover on pyrenecontaminated soils was not affected. The removal of pyrene from the spiked soils planted with white clover was obviously higher than that from the unplanted soils. At the end of the experiment (60 d), the average removal ratio of pyrene in the spiked soils with white clover was 77%, which was 31% and 57% higher than those of the controls with or without micobes, respectively. Both roots and shoots of white clover took up pyrene from the spiked soils and pyrene uptake increased with the soil pyrene concentration. However, the plant-enhanced dissipation of soil pyrene may be the result of plant-promoted microbial degradation and direct uptake and accumulation of pyrene by white clover were only a small part of the pyrene dissipation. Bioconcentration factors of pyrene (BCFs, ratio of pyrene, on a dry weight basis, in the plant to that in the soil) tended to decrease with increase in the residual soil pyrene concentration. Therefore, removal of pyrene in the contaminated soils was feasible using white clove.
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| 关 键 词： | 污染土壤 白三叶草 芘 微生物降解 生物浓缩因子 污染修复 污染物来源 多环芳烃 |
| 收稿时间： | 16 May 2008 |
Removal of pyrene from contaminated soils by white clover |
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| XU Sheng-You,CHEN Ying-Xu,LIN Kuang-Fei,CHEN Xin-Cai,LIN Qi,LI Feng,WANG Zhao-Wei.Removal of pyrene from contaminated soils by white clover[J].Pedosphere,2009,19(2):265-272. |
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| Authors: | XU Sheng-You CHEN Ying-Xu LIN Kuang-Fei CHEN Xin-Cai LIN Qi LI Feng and WANG Zhao-Wei |
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| Institution: | [1]Department of Environmental Engineering, Zhejiang University, Hangzhou 310029 China [2]College of Life and Environment, Huangshan University, Huangshan 245041 China [3]School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237 China |
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| Abstract: | Phytoremediation has been used as an emerging technology for remediation of soil contamination with polycyclic aromatic hydrocarbons (PAHs),ubiquitous persistent environmental pollutants derived from natural and anthropogenic processes,in the last decade.In this study,a pot experiment was conducted to investigate the potential of phytoremediation of pyrcne from spiked soils planted with white clover (Trifolium repens) in the greenhouse with a series of pyrene concentrations ranging from 4.22 to 365.38 mg kg-1.The results showed that growth of white clover on pyrenecontaminated soils was not affected.The removal of pyrene from the spiked soils planted with white clover was obviously higher than that from the unplanted soils.At the end of the experiment (60 d),the average removal ratio of pyrene in the spiked soils with white clover was 77%,which was 31% and 57% higher than those of the controls with or without micobes,respeetivcly.Both roots and shoots of white clover took up pyrene from the spiked soils and pyrene uptake increased with the soil pyrene concentration.However,the plant-enhanced dissipation of soil pyrene may be the result of plant-promoted microbial degradation and direct uptake and accumulation of pyrene by white clover were only a small part of the pyrene dissipation.Bioconcentration factors of pyrene (BCFs,ratio of pyrene,on a dry weight basis,in the plant to that in the soil) tended to decrease with increase in the residual soil pyrene concentration.Therefore,removal of pyrene in the contaminated soils was feasible using white clove. |
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| Keywords: | microbial degradation phytoremediation plant uptake and accumulation pyrene white clover |
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