| Eu(Ⅲ)在针铁矿及磷酸根改性针铁矿上的吸附 |
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| 引用本文： | 李琰,吴王锁.Eu(Ⅲ)在针铁矿及磷酸根改性针铁矿上的吸附[J].原子能科学技术,2013,47(1):14-20. |
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| 作者姓名： | 李琰 吴王锁 |
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| 作者单位： | 兰州大学 核科学与技术学院 放射化学与核环境研究所，甘肃 兰州730000 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用静态法研究了Eu(Ⅲ)在针铁矿及磷酸根改性的针铁矿上的吸附行为，测定了（25±1）℃下的吸附边界及吸附等温线，探讨了FA的存在对吸附的影响。实验结果表明，pH对吸附的影响较大，pH＝4～6为Eu(Ⅲ)在针铁矿上的吸附边界，磷酸根改性的针铁矿的吸附边界明显向低pH移动。Eu(Ⅲ)在针铁矿及磷酸根改性的针铁矿上的吸附更符合Freundlich等温线。Eu(Ⅲ)在针铁矿上的吸附主要是通过表面配位进行的。
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| 关 键 词： | 针铁矿 吸附 Eu(Ⅲ) |
Sorption of Eu(Ⅲ) on Goethite and P-Goethite |
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| LI Yan
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WU Wang-suo.Sorption of Eu(Ⅲ) on Goethite and P-Goethite[J].Atomic Energy Science and Technology,2013,47(1):14-20. |
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| Authors: | LI Yan WU Wang-suo |
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| Affiliation: | Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Sorption of Eu(Ⅲ) on goethite and P-goethite was studied using a batch experiment method. The results show that the sorption of Eu(Ⅲ) on goethite is strong pH-dependence, increases from about 10% to nearly 100% over the pH range of 4-6, and then keeps a constant level in higher pH range. The sorption edge of Eu(Ⅲ) onto P-goethite is much closer to a lower pH. The sorption isotherms were analyzed with Langmuir, Frenudlich and F-L models, and the Freundlich model can fit the data better. The presence of 20 mg/L FA has prominent effect on the sorption of Eu(Ⅲ) on goethite but little effect on P-goethite. |
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| Keywords: | goethite sorption Eu(Ⅲ) |
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