| 小麦根际土壤汞的分布和形态变化 |
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| 引用本文： | 侯明,张利香,那佳.小麦根际土壤汞的分布和形态变化[J].生态环境,2008,17(5). |
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| 作者姓名： | 侯明 张利香 那佳 |
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| 作者单位： | 桂林工学院材料与化学工程系,广西,桂林,541004 |
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| 基金项目： | 广西自然科学基金
，
广西环境工程与保护评价重点实验室研究基金
，
广西高校人才小高地建设环境工程创新团队资助计划
，
广西壮族自治区教育创新人才基地资助项目
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| 摘 要： | 采用根际箱试验和连续化学萃取法,结合氢化物原子吸收光谱法,研究了非根际和根际土壤汞形态分布特征及小麦(Triticum aestivum)生长期土壤汞形态变化.结果表明.非根际汞形态分布顺序为:残渣态>强有机质结合态>碳酸盐铁锰氧化物结合态>腐殖酸络合态>水溶态>交换态,根际汞形态分布为:残渣态>碳酸盐铁锰氧化态>强有机质结合态>交换态>腐殖酸络合态>水溶态.当外源汞进入土壤后,在小麦生长60 d内,植物吸收使残渣态汞和水溶态汞含量明显降低,交换态汞和碳酸盐铁锰氧化态汞含量增加.土壤汞污染程度越大,在小麦中积累的汞就越多.其生物毒性增强,环境危害加大.
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| 关 键 词： | 根际土壤 小麦 形态 汞 |
Mercury speciation and transformation in wheat rhizosphere soil |
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| Hou Ming,Zhang Lixiang,Na Jia.Mercury speciation and transformation in wheat rhizosphere soil[J].Ecology and Environmnet,2008,17(5). |
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| Authors: | Hou Ming Zhang Lixiang Na Jia |
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| Institution: | Hou Ming,Zhang Lixiang,Na Jia Department of Materials , Chemistry Engineering,Guilin University of Technolog,Guilin 541004,China |
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| Abstract: | Hg speciation and its transformation in wheat(Triticum aestivum) rhizosphere soil and non-rhizosphere soil during growth period is studied through rhizosphere box test,with sequential extraction-hydride atomic absorption spectrometry. The results reveal that,content of different Hg species in the non-rhizosphere soil are different in sequence:residue-bound>organic matter-bound>carbonate-bound and Fe-Mn oxide-bound>humic acid complexible>water soluble>exchangeable,and in the rhizosphere soil are in sequence:... |
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| Keywords: | soil rhizosphere wheat speciation mercury |
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