Investigation of radionuclide 63Ni(II) sorption on ZSM-5 zeolite
Investigation of radionuclide 63Ni(II) sorption on ZSM-5 zeolite
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DOI：
10.1007/s10967-010-0656-8
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发表时间：
2010-06
影响因子：
1.6
通讯作者：
Hui Zhang;Xian-jin Yu;Lei Chen;Jia-Zhen Geng
中科院分区：
文献类型：
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作者：
Hui Zhang;Xian-jin Yu;Lei Chen;Jia-Zhen Geng
在环境条件下通过间歇技术研究了使用ZSM-5沸石从水溶液中吸附 63 Ni(II)。 ZSM-5 沸石通过零净质子电荷点 (PZNPC) 滴定进行表征。研究了吸附与摇动时间、pH、离子强度、外来离子、腐殖酸 (HA)、黄腐酸 (FA) 和温度的函数关系。结果表明ZSM-5沸石上63Ni(II)的吸附强烈依赖于pH。吸附取决于低 pH 值下的离子强度，但与高 pH 值下的离子强度无关。 HA/FA的存在增强了低pH值下的63Ni(II)吸附，而降低了高pH值下的63Ni(II)吸附。 Langmuir 模型很好地模拟了吸附等温线。 63Ni(II) 吸附的热力学参数（即 ΔH0、ΔS0 和 ΔG0）分别由 293.15、313.15 和 333.15 K 处的温度依赖性吸附等温线确定，结果表明 63Ni(II) 在 ZSM-5 沸石上的吸附过程是自发的吸热过程。
The sorption of63Ni(II) from aqueous solution using ZSM-5 zeolite was investigated by batch technique under ambient conditions. ZSM-5 zeolite was characterized by point of zero net proton charge (PZNPC) titration. The sorption was investigated as a function of shaking time, pH, ionic strength, foreign ions, humic acid (HA), fulvic acid (FA) and temperature. The results indicate that the sorption of63Ni(II) on ZSM-5 zeolite is strongly dependent on pH. The sorption is dependent on ionic strength at low pH, but independent of ionic strength at high pH values. The presence of HA/FA enhances63Ni(II) sorption at low pH values, whereas reduces63Ni(II) sorption at high pH values. The sorption isotherms are simulated by Langmuir model very well. The thermodynamic parameters (i.e., ∆H0, ∆S0and ∆G0) for the sorption of63Ni(II) are determined from the temperature dependent sorption isotherms at 293.15, 313.15 and 333.15 K, respectively, and the results indicate that the sorption process of63Ni(II) on ZSM-5 zeolite is spontaneous and endothermic.