| 氧化还原条件对湿地土壤磷吸附与解吸特性的影响 |
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| 引用本文： | 陈亚东,梁成华,王延松,李月瑶,郭宝东,张永红.氧化还原条件对湿地土壤磷吸附与解吸特性的影响[J].生态学杂志,2010,29(4):724. |
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| 作者姓名： | 陈亚东 梁成华 王延松 李月瑶 郭宝东 张永红 |
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| 作者单位： | 1. 沈阳农业大学,沈阳,110161
2. 辽宁省环境科学研究院,沈阳,110031 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项资助项目(2008ZX07208-009) |
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| 摘 要： | 采用室内模拟试验研究了氧化还原条件对盘锦天然湿地土壤磷吸附与解吸特性的影响,并对磷的吸附与解吸过程进行拟合。结果表明,氧化或还原条件下Langmuir模型和Freundlich模型均能较好地拟合磷的等温吸附曲线,且Langmuir方程的拟合效果好于Freundlich方程。淹水还原条件下,湿地土壤对磷的最大吸附量和解吸率比淹水前分别降低了9.5%和16.3%;吸附解吸平衡浓度升高,平均增加158.8%。淹水后土壤活性铁含量明显升高,淹水前后活性铁变化与吸附解吸平衡浓度变化之间的相关性达到了显著水平,与土壤中磷的最大吸附量和解吸率变化的相关性不显著,表明活性铁含量的变化是淹水还原条件下影响土壤磷吸附解吸平衡浓度变化的主要因素。
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| 关 键 词： | 氧化还原 等温吸附 解吸 磷 |
Phosphorus adsorption and desorption characteristics of wetland soil under different redox conditions |
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| CHEN Ya-dong,LIANG Cheng-hua,WANG Yan-song,LI Yue-yao,GUO Bao-dong,ZHANG Yong-hong.Phosphorus adsorption and desorption characteristics of wetland soil under different redox conditions[J].Chinese Journal of Ecology,2010,29(4):724. |
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| Authors: | CHEN Ya-dong LIANG Cheng-hua WANG Yan-song LI Yue-yao GUO Bao-dong ZHANG Yong-hong |
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| Institution: | CHEN Ya-dong1,LIANG Cheng-hua1,WANG Yan-song2,LI Yue-yao1,GUO Bao-dong2,ZHANG Yong-hong2 (1Shenyang Agricultural University,Shengyang 110161,China,2Liaoning Academy of Environmental Sciences,Shenyang 110031,China) |
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| Abstract: | A laboratory simulation experiment was conducted to study the phosphorus adsorption/desorption characteristics of wetland soil in Panjin,Liaoning Province under different redox conditions.Langmuir model and Freundlich model were used to fit the phosphorus desorption processes.Under both anaerobic and aerobic conditions,the phosphorus adsorption/isotherms could be successfully fitted by the two models,and Langmuir model had better fitting effect.Under flooding,the maximum phosphorus adsorption and desorption... |
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| Keywords: | oxidation reduction adsorption isotherm desorption phosphorus |
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