Selective Recovery of Ag(I) Using a Cellulose-Based Adsorbent in High Saline Solution,Journal of Chemical & Engineering Data

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Selective Recovery of Ag(I) Using a Cellulose-Based Adsorbent in High Saline Solution
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-03-02 , DOI: 10.1021/acs.jced.9b01107
Xin Yang _{1,

2} , Zhen Dong ₃ , Manman Zhang ₃ , Jifu Du ₂ , Long Zhao ₃

Affiliation

A spherical cellulose-based adsorbent (2-AMP resin) functionalized by 2-aminomethyl-pyridine was prepared via the radiation grafting technology. The adsorption behavior of the 2-AMP resin for Ag(I) recovery was assessed by batch and column experiments. The adsorption isotherm was best represented by Langmuir isotherm, and the adsorption capacity of the 2-AMP resin was 110.5 mg/g. The adsorption kinetics was found to follow the pseudo-second-order kinetic model. Moreover, the adsorbent presented good selectivity for Ag(I) from the coexisting ions [Ca(II), Mg(II), Ni(II), and Zn(II)] both in the batch and column experiments. The adsorption efficiency was unchanged even when the NaNO₃ concentration was about 3000 fold higher than Ag(I). The interactions between the 2-AMP resin and Ag(I) were interpreted through XPS analysis, and the adsorption mechanism was proved to be a chelation interaction between aminomethyl-pyridine groups and Ag(I). It is demonstrated that the 2-AMP resin would have a splendid potential for the recovery of Ag(I).

中文翻译：

在高盐溶液中使用纤维素基吸附剂选择性回收Ag（I）

通过辐射接枝技术制备了一种被2-氨基甲基吡啶官能化的球形纤维素基吸附剂（2-AMP树脂）。通过分批和柱实验评估2-AMP树脂对Ag（I）回收的吸附行为。吸附等温线最好用Langmuir等温线表示，2-AMP树脂的吸附容量为110.5 mg / g。发现吸附动力学遵循伪二级动力学模型。此外，在分批和柱实验中，吸附剂对共存离子[Ca（II），Mg（II），Ni（II）和Zn（II）]的Ag（I）具有良好的选择性。即使当NaNO ₃时，吸附效率也没有变化。浓度比Ag（I）高约3000倍。通过XPS分析解释了2-AMP树脂与Ag（I）之间的相互作用，并证明了其吸附机理是氨基甲基吡啶基团与Ag（I）之间的螯合相互作用。证明2-AMP树脂将具有出色的回收Ag（I）的潜力。

更新日期：2020-04-24

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