| 熟污泥改性黄土对镉的吸附解吸特征 |
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| 引用本文： | 陈竞,武文飞,赵一莎,南忠仁,王胜利,王厚成.熟污泥改性黄土对镉的吸附解吸特征[J].土壤,2015,47(3):578-582. |
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| 作者姓名： | 陈竞 武文飞 赵一莎 南忠仁 王胜利 王厚成 |
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| 作者单位： | 兰州大学资源环境学院 兰州730000,兰州大学资源环境学院 兰州730000,兰州大学资源环境学院,兰州大学资源环境学院 兰州730000,兰州大学资源环境学院 兰州730000,兰州大学资源环境学院 兰州730000 |
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| 基金项目： | 国家自然科学基金项目(NSFC 51178209、NSFC 91025015),兰州大学中央高校基本科研业务费专项资金项目(lzujbky-2014-279)。 |
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| 摘 要： | 使用序批实验方法,研究熟污泥改性黄土对镉(Cd)的吸附解吸特征。结果表明:Cd初始添加浓度大于20 mg/L,供试改性黄土对Cd的吸附等温线发生显著变化;Freundlich型吸附等温式是描述供试改性黄土对Cd吸附过程的最佳模型。各土样对Cd的解吸量与吸附量的关系可以用幂函数很好地描述。随着土样中熟污泥含量的增加,Cd的吸附固定作用增强。有机质成分是影响供试土样Cd固定能力最大的因素。
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| 关 键 词： | 熟污泥 黄土 镉 吸附 解吸 |
| 收稿时间： | 7/2/2014 12:00:00 AM |
| 修稿时间： | 2014/9/10 0:00:00 |
Sorption and Desorption of Cadmium in Loess Improved by Composted Sludge |
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| CHEN Jing,WU Wen-fei,ZHAO Yi-sh,NAN Zhong-ren,WANG Sheng-li and WANG Hou-cheng.Sorption and Desorption of Cadmium in Loess Improved by Composted Sludge[J].Soils,2015,47(3):578-582. |
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| Authors: | CHEN Jing WU Wen-fei ZHAO Yi-sh NAN Zhong-ren WANG Sheng-li and WANG Hou-cheng |
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| Institution: | College of Earth and Environmental Sciences,Lanzhou University,College of Earth and Environmental Sciences,Lanzhou University,College of Earth and Environmental Sciences,Lanzhou University,College of Earth and Environmental Sciences,Lanzhou University,College of Earth and Environmental Sciences,Lanzhou University,College of Earth and Environmental Sciences,Lanzhou University |
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| Abstract: | Laboratory batch experiments were conducted to study the sorption and desorption of cadmium (Cd) in the loess samples improved by composted sludge. The results show that: There was significant difference in change rules of adsorption isotherm before and after 20 mg/L of the initial cadmium concentration. Cadmium absorption behavior could be described by Freundlich equation. Relation between adsorption and desorption of cadmium could be described by exponential function. Stable adsorption capacity increased with the concentration of composted sludge in soil samples increased. The organic matter in soil samples had the greatest contribution to the stable ability of cadmium. |
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| Keywords: | composted sludge loess cadmium (Cd) sorption desorption |
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