Sorption Studies of Cesium on Kunipia-F Bentonite and Silicon Dioxide

IF 0.6 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Chiang Mai Journal of Science Pub Date : 2022-09-30 DOI:10.12982/cmjs.2022.093

A. O-manee, Y. Enokida, Kayo Sawada

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引用次数: 0

Abstract

Adsorption is one of the effective methods used for the removal of contaminants from radioactive wastewater. In this research, removal efficiency of Cs from the prepared low-concentration Cs solution (100 μg/L) was studied using two different adsorbents namely high purity Kunipia-F bentonite and Silicon dioxide (SiO2). After performing the adsorption tests, the Cs ions in liquid and solid phases were analyzed using the inductively coupled plasma mass spectrometry (ICP-MS) technique. The adsorption capacities of both materials were then compared. It was found that the Cs adsorption capacity of bentonite was higher than that of SiO2. The distribution coefficient of Cs in the bentonite was 1.0 L-sol/g-solid, which was 100 times greater than that of SiO2. The highest sorption of Cs on bentonite could be attributed to its smaller particle size (0.362 μm), compared to the SiO2 particle size (0.625 μm). Bentonite is natural clay and is generally used as a buffer material in geological disposal systems for high-level nuclear waste. The results of this research indicate that bentonite could be an effective absorbent for decontaminating low concentration Cs in radioactive wastewater.

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Kunipia-F膨润土和二氧化硅对铯的吸附研究

吸附法是去除放射性废水中污染物的有效方法之一。采用高纯度Kunipia-F膨润土和二氧化硅(SiO2)两种不同的吸附剂，对制备的低浓度(100 μg/L) Cs溶液中的Cs进行了去除效果研究。在进行吸附试验后，采用电感耦合等离子体质谱(ICP-MS)技术对液相和固相中的Cs离子进行分析。然后比较了两种材料的吸附能力。结果表明，膨润土对Cs的吸附量高于SiO2。Cs在膨润土中的分布系数为1.0 L-sol/g-solid，是SiO2的100倍。膨润土的粒径为0.362 μm，比SiO2的粒径(0.625 μm)小。膨润土是一种天然粘土，通常用作高放核废料地质处置系统中的缓冲材料。研究结果表明，膨润土可作为一种有效的吸收剂，用于放射性废水中低浓度铯的净化。

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来源期刊

Chiang Mai Journal of Science MULTIDISCIPLINARY SCIENCES-

CiteScore

1.00

自引率

25.00%

发文量

103

审稿时长

3 months

期刊介绍： The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.