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| 红壤和黄土对铊的吸附行为研究 | |
| 引用本文： | 张飞,李祥平,齐剑英,陈永亨.红壤和黄土对铊的吸附行为研究[J].安徽农业科学,2011,39(21):12747-12749,12852. |
| 作者姓名： | 张飞 李祥平 齐剑英 陈永亨 |
| 作者单位： | 1. 广州大学环境科学与工程学院,广东广州,510006 2. 广州大学化工化学学院,广东广州,510006 3. 环境保护部华南环境科学研究所,广东广州,510655 |
| 基金项目： | 国家自然科学基金青年基金项目，中国博士后科学基金项目，国家自然科学基金委员会-广东省人民政府联合基金项目，中央级公益性科研所公益基金项目 |
| 摘 要： | 利用一次平衡法,研究红壤和黄土对Tl＋吸附的热力学和动力学过程。结果表明,在试验所采用的Tl＋浓度范围内,红壤和黄土对Tl＋的吸附量均随着加入浓度的增加而增加,但是黄土对Tl＋的吸附能力明显高于红壤。2种土壤对Tl＋的吸附等温线用Langmuir方程拟合效果最好。红壤吸附Tl＋很快,20min左右基本达到平衡。而随着初始浓度的提高,黄土对Tl＋的吸附达到吸附平衡所需的时间增长,在最大浓度（15mg/L）时约120min达到吸附平衡。2种土壤对Tl＋吸附动力学过程用双常数方程拟合效果最好。 |
| 关 键 词： | Tl＋ 红壤 黄土 吸附 热力学 动力学 |
Adsorption Behavior of Thallium by Red Soil and Loess |
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| Institution: | ZHANG Fei et al(School of Environmental Science and Engineering,Guangzhou University,Guangzhou,Gungdong 510006) |
| Abstract: | The thermodynamics and kinetics of thallium adsorption by red soil and loess were studied with once balance method.The study showed that the adsorption of Tl + by two soils was increased with the increasing concentration of Tl + within the range of Tl + concentrations used in the experiment,but the amount of Tl + adsorbed on loess was higher than that on red soil.Langmuir equation was the optimal model to describe the adsorption of Tl + by the soils.The adsorption of red soil was very rapid,which could reach its balance after 20 min.The adsorption of Tl + by loess was very rapid at low concentrations.As the concentration increased,reaching its balance required more time.The balance would be reached in 120 min at the maximum concentration of 15 mg/L.Two-constant equation was the optimal model to describe the adsorption kinetics process of Tl + by red soil and loess. |
| Keywords: | Tl + Red soil Loess Adsorption Thermodynamics Kinetics |
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