| 4种湿地植物根系泌氧由根诱导的pH,Eh和Fe(II)变化和根际土壤中铅和锌的组分研究 |
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| 作者姓名： | YANG Jun-Xing LIU Yong YE Zhi-Hong |
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| 作者单位： | INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France);INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France);INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France);INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France);INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France);INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France);INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France);INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France) |
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| 基金项目： | Supported by the French Agency for Environment and Energy(ADEME) (No.0075033);the Ph.D.Grants and the Marie-Curie Fellowship of the European Union(No.MEIF-CT-2003-500956) |
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| 摘 要： | A rhizobox experiment was conducted to compare iron (Fe) oxidation and changes of pH, redox potential (Eh) and fractions of zinc (Zn) and lead (Pb) in rhizosphere and non-rhizosphere soils of four emergent-rooted wetland plants (Echinodorus macrophyllus, Eleocharis geniculata, Hydrocotyle vulgaris and Veronica serpyllifolia) with different radial oxygen loss (ROL) from roots. The results indicated that all these wetland plants decreased pH and concentration of Fe(Ⅱ) but increased the Eh in the rhizosphere soils. Pb and Zn were transformed from unstable fractions to more stable fractions in the rhizosphere soils, so decreasing their potential metal mobility factors (MF). Among the four plants, E. macrophyllus, with the highest ROL and root biomass, possessed the greatest ability in formation of Fe plaque and in the reduction of heavy metal MFs in the rhizosphere soil. Wetland plants, with higher ROLs and root biomass, may thus be effective in decreasing potential long-term heavy metal bioavailabilities.
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| 关 键 词： | heavy metal iron oxidation mobility factor plaque rhizobox |
| 收稿时间： | 9 March 2012 |
Root-induced changes of pH, Eh, Fe(II) and fractions of Pb and Zn in rhizosphere soils of four wetland plants with different radial oxygen losses |
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| YANG Jun-Xing,LIU Yong,YE Zhi-Hong.Root-induced changes of pH, Eh, Fe(II) and fractions of Pb and Zn in rhizosphere soils of four wetland plants with different radial oxygen losses[J].Pedosphere,2012,22(4):518-527. |
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| Authors: | YANG Jun-Xing LIU Yong and YE Zhi-Hong |
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| Institution: | M. BARRET, L. DELGADILLO-MIRQUEZ, E. TRABLY, N. DELGENES, F. BRAUN, G. CEA-BARCIA, J. P. STEYER and D. PATUREAU 2 INRA, UR0050, Laboratoire de Biotechnologie de l’Environnement, Narbonne F-11100 (France) |
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| Abstract: | |
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| Keywords: | anaerobic digestion bioavailability biodegradation microbial cometabolism organic matter |
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