高岭土吸附稀土元素的实验研究
Experimental Study of Sorption of Lanthanides on Kaolin
查看参考文献22篇
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文摘
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为更好了解粘土矿物对稀土元素(REE)的吸附及其控制因素,进行了不同溶液介质条件(平衡时间、REE含量、pH＝3～6.5) 1 g?L-1高岭土对REE吸附的系列实验.结果表明: 稀土在较短时间内(24 h)吸附/解吸过程达到平衡;Langmuir吸附等温线能模拟REE在高岭土上的吸附,总的趋势是REE含量越高,分馏越不明显;此外,pH对REE吸附和分馏有很大影响,REE分配系数随pH值增加而增加,且在pH近中性时,出现了明显的重稀土比轻稀土更多的被吸附. |
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其他语种文摘
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For a betLer understanding of adsorption of rare earth elements (REE) in minerals and its control-ling factors, adsorption experiments were performed at different solution condition (time, REE concentration, pH) with 1 g'L"1 Kaolin. REE get equilibrium in 24 h, and Langmuir adsorption curve can model sorption of Ln on Kaolin. The general trend is the fractionation between REEs which is less obvious in high REE con-centration than low REE concentration. Furthermore, there is significant effect of pH on the adsorption and fractionation of REE on Kaolin. REE distribution coef-ficient increases as solution pH increases, and heavy REE enrichment are is and more significant when so-lution pH increases. |
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来源
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中国稀土学报
,2004,22(4):507-511 【核心库】
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关键词
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土壤学
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高岭土
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吸附
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分配系数
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稀土
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地址
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4343 |
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学科
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化学 |
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基金
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中国科学院知识创新工程重要方向项目
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国家自然科学基金国家杰出青年科学基金
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文献收藏号
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CSCD:1587775
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