| Eu(III)在北山花岗岩上的吸附作用 |
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| 引用本文： | 郭治军,陈宗元,吴王锁,刘春立,陈涛,田文宇,黎春. Eu(III)在北山花岗岩上的吸附作用[J]. 中国科学:化学, 2011, 0(5): 907-913 |
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| 作者姓名： | 郭治军 陈宗元 吴王锁 刘春立 陈涛 田文宇 黎春 |
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| 作者单位： | 北京分子科学国家实验室北京大学化学与分子工程学院;兰州大学核科学与技术学院; |
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| 基金项目： | 国家自然科学基金(10775008&20971061); 教育部博士点基金(20060001032); 国防科工委军工遗留专项基金(科工计[2007]840); 中央高校基本科研业务费专项资金; 北京大学测试基金(第13–18期)资助 |
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| 摘 要： | 用电位滴定法研究了甘肃北山花岗岩(BS03,600m)的酸、碱性质,用批式法研究了Eu(III)在该花岗岩上的吸附行为.实验结果表明:在离子强度I=0.1M的NaCl溶液中,北山花岗岩的pHPZNPC为9.4,当I增大至0.4M时,pHPZNPC为9.0.不同离子强度下花岗岩的电位滴定曲线与类似条件下蒙脱石的相仿.Eu(III)在北山花岗岩上的吸附分配比(Kd)随pH、离子强度和Eu(III)浓度的变化而变化.在低pH范围,Eu(III)的Kd值随离子强度的增大显著减小,而在高pH值范围,离子强度对Kd的影响甚微.用模型定量解释了Eu(III)在北山花岗岩上的吸附随pH、离子强度和Eu(III)浓度而变化的实验数据,该模型包含Eu3+与花岗岩发生的阳离子交换反应以及Eu(III)与花岗岩表面羟基发生两个内层表面配合反应(inner-sphere surface complexation reactions).用所建模型对离子强度为0.1M时Eu(III)在北山花岗岩上的吸附行为作了预测,并与文献报道的类似条件下Am(III)在北山花岗岩上的吸附实验数据作了比较.
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| 关 键 词： | 北山花岗岩 吸附 Eu(III) 表面配位 构模 |
The adsorption of Eu(III) on Beishan granite |
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| GUO ZhiJun,,CHEN ZongYuan,WU WangSuo,LIU ChunLi,CHEN Tao,TIAN WenYu , LI Chun Beijing National Laboratory for Molecular Sciences,College of Chemistry , Molecular Engineering,Peking University,Beijing ,China School of Nuclear Science , Technology,Lanzhou University,Lanzhou ,China. The adsorption of Eu(III) on Beishan granite[J]. Scientia Sinica Chimica, 2011, 0(5): 907-913 |
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| Authors: | GUO ZhiJun CHEN ZongYuan WU WangSuo LIU ChunLi CHEN Tao TIAN WenYu & LI Chun Beijing National Laboratory for Molecular Sciences College of Chemistry Molecular Engineering Peking University Beijing China School of Nuclear Science Technology Lanzhou University Lanzhou China |
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| Affiliation: | GUO ZhiJun1,2,CHEN ZongYuan2,WU WangSuo2,LIU ChunLi1,CHEN Tao1,TIAN WenYu1 & LI Chun1 1 Beijing National Laboratory for Molecular Sciences,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China 2 School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China |
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| Abstract: | The acid-base chemistry of Beishan (Gansu, China) granite (BS03, 600 m) was studied by potentiometric titration, and the adsorption of Eu(III) on the granite was investigated using a batch technique. It was found that the pHPZNPC of the granite is 9.4 at I = 0.1 M NaCl and decreases to 9.0 at I = 0.4 M NaCl. The profile of parallel titration curves of the granite at variable ionic strengths is roughly comparable to that of montmorillonite under similar conditions. The distribution coefficient (Kd) of Eu(III... |
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| Keywords: | Beishan granite adsorption Eu(III) surface complexation modeling |
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