| 共培养对土壤重金属污染植物修复的调控作用 |
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| 作者姓名： | NI Cai-Ying SHI Ji-Yan LUO Yong-Ming CHEN Ying-Xu |
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| 作者单位： | Department of Environmental Engineering, School of Environment and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: ncy1919@yahoo.com.cn;Institute of Geography and Environment, Jiangxi Normal University, Nanchang 330027 (China);Department of Environmental Engineering, School of Environment and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: ncy1919@yahoo.com.cn;Soil and Environment Bioremediation Hesearch Centre, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Department of Environmental Engineering, School of Environment and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: ncy1919@yahoo.com.cn |
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| 基金项目： | *1Project supported by the National Natural Science Foundation of China (Nos.40271060 and 41025005) and the National Key Basic Research Support Foundation (NKBRSF) of China (No.2002CB410809/10). |
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| 摘 要： | A co-culture of two plant materials, Astragalus sinicus L., a leguminous plant with concomitant nodules, and Elsholtzia splendens Naki-a Cu accumulator, along with treatments of a chelating agent (EDTA), root excretions (citric acid), and a control with E. splendens only were used to compare the mobility of heavy metals in chelating agents with a co-culture and to determine the potential for co-culture phytoremediation in heavy metal contaminated soils. The root uptake for Cu, Zn, and Pb in all treatments was significantly greater (P < 0.05) than that of the control treatment. However with translocation in the shoots, only Cu, Zn, and Pb in plants grown with the EDTA treatment and Zn in plants co-cropped with the A. sinicus treatment increased significantly (P < 0.05). In addition, when a co-culture in soils with heavy and moderate contamination was compared, for roots in moderately contaminated soils only Zn concentration was significantly less (P < 0.05) than that of heavily contaminated soils, however, Cu, Zn, and Pb concentrations of shoots were all significantly lower (P < 0.05). Overall, this "co-culture engineering" could be as effective as or even more effective than chelating agents, thereby preventing plant metal toxicity and metal leaching in soils as was usually observed in chelate-enhanced phytoremediation.
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| 关 键 词： | Astragalus sinicus chelating agents co-culture Elsholtzia splendens phytoremediation |
"Co-culture Engineering" for Enhanced Phytoremediation of Metal Contaminated Soils |
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| NI Cai-Ying,SHI Ji-Yan,LUO Yong-Ming,CHEN Ying-Xu."Co-culture Engineering" for Enhanced Phytoremediation of Metal Contaminated Soils[J].Pedosphere,2004,14(4):475-482. |
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| Authors: | NI Cai-Ying SHI Ji-Yan LUO Yong-Ming and CHEN Ying-Xu |
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| Affiliation: | Department of Environmental Engineering, School of Environment and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: ncy1919@yahoo.com.cn;Institute of Geography and Environment, Jiangxi Normal University, Nanchang 330027 (China);Department of Environmental Engineering, School of Environment and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: ncy1919@yahoo.com.cn;Soil and Environment Bioremediation Hesearch Centre, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Department of Environmental Engineering, School of Environment and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: ncy1919@yahoo.com.cn |
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| Abstract: | A co-culture of two plant materials, Astragalus sinicus L., a leguminous plant with concomitant nodules, and Elsholtzia splendens Naki-a Cu accumulator, along with treatments of a chelating agent (EDTA), root excretions (citric acid), and a control with E. splendens only were used to compare the mobility of heavy metals in chelating agents with a co-culture and to determine the potential for co-culture phytoremediation in heavy metal contaminated soils. The root uptake for Cu, Zn, and Pb in all treatments was significantly greater (P < 0.05) than that of the control treatment. However with translocation in the shoots, only Cu, Zn, and Pb in plants grown with the EDTA treatment and Zn in plants co-cropped with the A. sinicus treatment increased significantly (P < 0.05). In addition, when a co-culture in soils with heavy and moderate contamination was compared, for roots in moderately contaminated soils only Zn concentration was significantly less (P < 0.05) than that of heavily contaminated soils, however, Cu, Zn, and Pb concentrations of shoots were all significantly lower (P < 0.05). Overall, this "co-culture engineering" could be as effective as or even more effective than chelating agents, thereby preventing plant metal toxicity and metal leaching in soils as was usually observed in chelate-enhanced phytoremediation. |
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| Keywords: | Astragalus sinicus chelating agents co-culture Elsholtzia splendens phytoremediation |
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