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摘要
为了研究辐射作用对膨润土性能的影响,以改性钠基膨润土为研究对象。采用电子加速器和钴源在室温下进行辐照,并对老化样品进行了测试。结果表明,在累积受照剂量为5MGy,电子辐照、γ辐照作用条件下,改性钠基膨润土的阳离子交换容量分别为77.36meq/100g、77.89meq/100g,分别比未辐照的改性钠基膨润土下降了3.7%和3.0%;自由膨胀体积分别为20.4mL、20.8mL,分别比未辐照的改性钠基膨润土下降了11.3%和9.6%。电子辐照和γ辐照作用后,导致改性钠基膨润土的阳离子交换能力下降,吸水能力减弱,自由膨胀能力下降。
Abstract
In order to investigate the influence of irradiation on performance of bentonite,taking the modified Na-bentonite as object.The samples were irradiated by electron and gamma irradiation at room temperature,and then the ageing samples were tested.The results showed that:when the cumulative dose was up to 5MGy for electron and γ irradiation,the cation exchange capacities were 77.36meq/100g and 77.89meq/100g,which decreased by 3.7% and 3.0% from unirradiated modified Na-bentonite respectively.The free expansion volumes were 20.4mL and 20.8mL,which decreased by 11.3% and 9.6% from unirradiated modified Na-bentonite.After electron and gamma irradiation,the cationic exchange ability of samples was reduced,the water absorption ability was weakened,and the free expansion ability was reduced.
关键词
膨润土
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电子辐照
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γ辐照
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阳离子交换容量
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膨胀能力
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微观结构
Key words
bentonite
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electron irradiation
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γ irradiation
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cation exchange capacity
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swelling capacity
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microstructure
两种辐射作用对改性钠基膨润土性能影响的研究[J].
化工新型材料, 2019, 47(4): 185-187 DOI:
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