| 砷在棕壤中的吸附解吸行为及赋存形态研究 |
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| 引用本文： | 梁成华,刘学,杜立宇,金广哲,王楠,刘俊杰.砷在棕壤中的吸附解吸行为及赋存形态研究[J].河南农业科学,2009(4). |
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| 作者姓名： | 梁成华 刘学 杜立宇 金广哲 王楠 刘俊杰 |
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| 作者单位： | 1. 沈阳农业大学,土地与环境学院,辽宁,沈阳,110161
2. 阜新市科技情报所,辽宁,阜新,123000 |
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| 基金项目： | 国家重点基础研究发展规划(973计划) |
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| 摘 要： | 采用一次平衡法研究砷在棕壤中的吸附解吸行为,以及砷在不同污染负荷土壤中的形态分布特征。结果表明,Langmuir方程可以很好地拟合砷在土壤中的吸附,利用该方程计算出砷在棕壤中的最大吸附量为250.0 mg/kg。砷吸附解吸动力学研究结果表明,Lagergren二级速度方程对砷吸附的拟合效果最好,但是对解吸的拟合效果最差,双常数方程对砷解吸的拟合效果最好。通过外源向土壤中添加砷后,随着砷添加量的增加,活性砷占总砷的百分比相应提高,稳定态砷占总砷的百分比下降。
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| 关 键 词： | 砷 棕壤 吸附-解吸 赋存形态 |
The Studies on the Adsorptive-desorptive Behaviour of Arsenic in Brown Soil and Its Form Distribution |
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| LIANG Cheng-hua,LIU Xue,DU Li-yu,JIN Guang-zhe,WANG Nan,LIU Jun-jie.The Studies on the Adsorptive-desorptive Behaviour of Arsenic in Brown Soil and Its Form Distribution[J].Journal of Henan Agricultural Sciences,2009(4). |
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| Authors: | LIANG Cheng-hua LIU Xue DU Li-yu JIN Guang-zhe WANG Nan LIU Jun-jie |
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| Institution: | 1.Colledge of Soil and Environment;Shenyang Agricultual University;Shenyang 110161;China;2.Technology Information Institute of Fuxin;Fuxin 123000;China |
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| Abstract: | With the batch method,arsenate adsorptive-desorptive behavior in the brown soil and its form distribution in different metal burden soils were studied.The results indicated that arsenic adsorption could be better fitted by Langmuir equations.The maximum adsorption capacity of the brown soil towards arsenic was 250.0 mg/kg.The adsorption kinetic data indicated that Lagergren second-order rate equation described the adsorption best,but not the desorption;two-constant equation describe the desorption best.By a... |
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| Keywords: | Arsenic Brown soil Adsorption-desorption Form |
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