Cesium adsorption from aqueous solutions onto Japanese oak charcoal III: effects of water-extraction treatment

Cesium adsorption from aqueous solutions onto Japanese oak charcoal III: effects of water-extraction treatment
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日本橡木炭从水溶液中吸附铯 III:脱水处理的效果

DOI:
10.1007/s10086-016-1578-z
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发表时间:
2016
影响因子:
2.9
通讯作者:
Mitsuyoshi Yatagai
Mitsuyoshi Yatagai
中科院分区:
材料科学3区
文献类型:
--
作者:
Shigeru Yamauch;Takayuki Yamagishi;Kazuko Kirikoshi;Mitsuyoshi Yatagai

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为去除日本栎(Quercus serrataThunb.)和/或皱皮栎(Quercus crispula Blume)炭(OC),采用水提取处理。重复处理1、4、8或12次。使用离子色谱装置测定从未处理和处理的OC洗脱的四种金属(钠、钾、镁和钙)离子的量。采用2.50 × 10− 5和2.50 × 10− 6 mol/L氯化铯溶液,研究了水萃取处理对OC吸附铯能力的影响。对于这两种水溶液,得到了一个意想不到的结果,即当水提取处理的重复超过一定的阈值时,OC的铯吸附能力突然下降。我们解释的样品溶液的pH值和OC的零电荷点的结果。
To remove group 1 and 2 metal ions from Japanese oak (Quercus serrataThunb. and/orQuercus crispulaBlume) charcoal (OC), a water-extraction treatment was employed. The treatment was repeated 1, 4, 8, or 12 times. The amounts of four metal (sodium, potassium, magnesium, and calcium) ions eluted from non-treated and treated OC were determined using an ion chromatographic apparatus. The effects of water-extraction treatment on the ability of OC to adsorb cesium were investigated using 2.50 × 10−5and 2.50 × 10−6mol/L aqueous cesium chloride solutions. As for both aqueous solutions, an unexpected result was obtained in that the cesium-adsorption ability of OC decreased suddenly when the repetition of water-extraction treatments exceeded a certain threshold. We explain the results in terms of pH of the sample solutions and the point of zero charge for OC.
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