| 模拟根系分泌物对土壤吸附菲的影响 |
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| 引用本文： | 任丽丽,凌婉婷,倪贺伟,高彦征.模拟根系分泌物对土壤吸附菲的影响[J].中国环境科学,2010,30(1):128-132. |
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| 作者姓名： | 任丽丽 凌婉婷 倪贺伟 高彦征 |
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| 作者单位： | 南京农业大学资源与环境科学学院江苏南京210095 |
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| 基金项目： | 国家自然科学基金资助项目，江苏省自然科学基金项目，国家大学生科研训练计划项目 |
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| 摘 要： | 采用批量平衡试验方法,研究了模拟根系分泌物(ARE)对黄棕壤、棕红壤和红壤吸附菲的影响.结果表明,3种土壤对菲的等温吸附曲线均为线性,加入ARE后,土壤吸附菲的分配系数(Kd)和有机碳标化的分配系数(Koc)显著降低,且降低量随着ARE浓度的增加而增大,表明ARE抑制了土壤对菲的吸附.土壤有机质含量越低,ARE对土壤吸附菲的抑制作用越明显.分析土样吸附菲的平衡溶液中水溶性有机质(DOM)浓度,发现加入ARE后土壤有机质含量略有降低(1.64%),而DOM浓度增大,DOM与菲的结合作用对土壤吸附菲的抑制作用增强,这可能是ARE抑制土壤吸附菲的主要原因.
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| 关 键 词： | 模拟根系分泌物 菲 土壤 吸附 |
| 收稿时间： | 2009-06-05; |
Effect of artificial root exudates on the sorption of phenanthrene in soils |
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| REN Li-li,LING Wan-ring,NI He-wei,GAO Yan-zheng.Effect of artificial root exudates on the sorption of phenanthrene in soils[J].China Environmental Science,2010,30(1):128-132. |
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| Authors: | REN Li-li LING Wan-ring NI He-wei GAO Yan-zheng |
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| Institution: | REN Li-li,LING Wan-ting,NI He-wei,GAO Yan-zheng(College of Resource , Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China). |
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| Abstract: | The sorption of phenanthrene by three soils with addition of artificial root exudate(ARE) was investigated using a batch experimental method.Phenanthrene sorption isotherms by soils could be significantly described by a liner sorption model irrespective of the addition of ARE.The distribution coefficients(Kd) and the organic carbon-normalized distribution coefficients(Koc) for phenanthrene sorption were significantly lower when ARE present in soils,and Kd and Koc values tended to decrease with increasing th... |
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| Keywords: | root exudate phenanthrene soil sorption |
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