Mechanism of Palladium(II) Adsorption from Nitric Acid Solutions by a Styrene-Divinylbenzene Copolymer Functionalized with N,N,N-Trimethylglycine

IF 0.6 4区工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY Solvent Extraction Research and Development, Japan Pub Date : 2019-01-01 DOI:10.15261/SERDJ.26.11

Tomoya Suzuki, H. Narita, Takeshi Ogata, Hideya Suzuki, T. Matsumura, Tohru Kobayashi, H. Shiwaku, T. Yaita

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引用次数: 3

Abstract

The ability of AMP03, a styrene–divinylbenzene copolymer functionalized with N,N,N -trimethylglycine moieties, to adsorb Pd(II) from HNO 3 solutions was investigated to elucidate the affinity of N,N,N -trimethylglycine for Pd(II). AMP03 effectively adsorbed Pd(II) from 0.10–0.50 M solutions in HNO 3 , and the adsorption ability decreased with increasing HNO 3 concentration owing to competitive adsorption of the acid. In contrast, the presence of added NO 3− increased the Pd(II) adsorption ability of the copolymer. On the basis of slope analysis of data for Pd(II) and HNO 3 at adsorption equilibrium, the Pd(II)/NO 3− /ligand stoichiometry of the adsorbed Pd(II) species was determined to be 1 : 2 : 1. Structural studies performed by means of Fourier transform infrared spectroscopy and extended X-ray absorption fine structure spectroscopy revealed that the N,N,N -trimethylglycine moieties on AMP03 and NO 3− coordinated to Pd(II) via their oxygen atoms. The adsorption selectivity of AMP03 for Pd(II), Ni(II), Cu(II), and Fe(III) was compared with the selectivities of commercially available carboxylic acid and iminodiacetic acid resins. AMP03 selectively adsorbed Pd(II) over Ni(II), Cu(II), and Fe(III) compared with that of the other resins. Our results suggest that AMP03 can be used for selective recovery of Pd(II) from HNO 3 solution.

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N,N,N-三甲基甘氨酸功能化苯乙烯-二乙烯基苯共聚物对硝酸溶液中钯的吸附机理

研究了N,N,N -三甲基甘氨酸功能化的苯乙烯-二乙烯基苯共聚物AMP03吸附hno3溶液中Pd(II)的能力，以阐明N,N,N -三甲基甘氨酸对Pd(II)的亲和力。在hno3溶液中，AMP03能有效吸附0.10 ~ 0.50 M溶液中的Pd(II)，随着hno3浓度的增加，由于酸的竞争吸附，AMP03的吸附能力下降。相反，no3−的存在提高了共聚物对Pd(II)的吸附能力。通过对Pd(II)和hno3吸附平衡态数据的斜率分析，确定了Pd(II)/ no3−/配体的化学计量比为1:1:2:1。利用傅里叶变换红外光谱和扩展x射线吸收精细结构光谱进行的结构研究表明，AMP03和NO 3 -上的N,N,N -三甲基甘氨酸部分通过氧原子与Pd(II)配位。比较了AMP03对Pd(II)、Ni(II)、Cu(II)和Fe(III)的吸附选择性与市售羧酸树脂和亚氨基二乙酸树脂的吸附选择性。与其他树脂相比，AMP03在Ni(II)、Cu(II)和Fe(III)上选择性吸附Pd(II)。结果表明，AMP03可用于从hno3溶液中选择性回收Pd(II)。

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来源期刊

Solvent Extraction Research and Development, Japan 工程技术-工程：化工

CiteScore

1.30

自引率

14.30%

发文量

审稿时长

1 months

期刊介绍： Solvent Extraction Research and Development, Japan (Solvent Extr. Res. Dev., Jpn.) is a periodical issued from Japan Association of Solvent Extraction (JASE) containing papers dealing with all aspects of solvent extraction and their related methods, underlying principles, and materials. Original articles, notes, technical reports, and critical reviews will be considered for publication. Original articles must be of reasonably broad scope and significance to the solvent extraction. Notes will originally describe novel work of a limited nature or especially significant work in progress. Authors can contribute some information of novel techniques, equipment or apparatus, reagents and diluents for solvent extraction as technical reports. Critical reviews will be received from the authors to whom the editorial committee asked to contribute.