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首页> 外文期刊>Clay Minerals >Effects of γ-irradiation on the Cu~(2+) sorption behaviour of NaOH-modified Philippine natural zeolites
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Effects of γ-irradiation on the Cu~(2+) sorption behaviour of NaOH-modified Philippine natural zeolites

机译：γ-辐照对NaOH改性菲律宾天然沸石Cu〜（2+）吸附行为的影响

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摘要

Adsorption kinetic and thermodynamic tests were conducted using non-irradiated and gamma-irradiated (400 kGy) NaOH-modified Philippine natural zeolites for the removal of Cu2+ ions in aqueous solution. The effects of gamma-radiation on zeolites were investigated. Samples were equilibrated with binary systems of Cu2+ - 2Na(+) at room temperature. There were no significant changes in the elemental composition of the irradiated zeolite. Irradiation primarily results in the shrinking of the zeolite framework and improvements in the crystallinity. The gamma-irradiation increases the sorption uptake according to the kinetic study in which the adsorption kinetics followed a pseudo-second-order model. Thermodynamic tests show that the adsorption isotherms of the two samples are best described by the Langmuir model. The maximum adsorption capacities of the non-irradiated and gamma-irradiated NaOH-modified zeolites are 33.00 and 43.22 mg Cu2+ g(-1), respectively, suggesting that gamma-irradiation might enhance the maximum adsorption capacity by up to 30.8%.
机译：使用非照射和γ辐照（400kGy）NaoH改性菲律宾天然沸石进行吸附动力学和热力学试验，用于在水溶液中除去Cu 2 +离子。研究了γ-辐射对沸石的影响。在室温下用Cu 2 + < - < - +）的二元体系平衡样品。辐照沸石的元素组成没有显着变化。辐照主要导致沸石骨架的收缩和改进结晶度。 γ-辐照增加了根据动力学研究的吸附吸收，其中吸附动力学遵循伪二阶模型。热力学测试表明，两个样品的吸附等温线是最佳的Langmuir模型描述的。非照射和γ辐照的NaOH改性沸石的最大吸附容量分别为33.00和43.22mg Cu 2 + G（-1），表明γ-辐照可提高最大吸附能力达30.8％。

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