Solid-Phase Extractants Based on Carbon Nanotubes for Preconcentrating Noble Metals from Hydrochloric Acid Media

IF 1 4区化学 Q4 CHEMISTRY, ANALYTICAL

Journal of Analytical Chemistry Pub Date : 2024-09-03 DOI:10.1134/S1061934824700564

E. A. Zakharchenko, V. P. Kolotov, V. I. Kazin, D. N. Dogadkin, A. E. Burakov, I. V. Burakova, D. A. Tyurin, A. G. Tkachev

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Abstract

Effective solid-phase extractants (SPE) based on multi-walled carbon nanotubes (CNT) of various structures modified with an organic reagent, 2-mercaptobenzothiazole, were developed. Using scanning and transmission electron microscopy, the morphological and structural features of SPE samples and their elemental composition were determined. It was shown that the specific surface area of the modified CNT is approximately two times lower compared to the original CNT. It was revealed that the modified materials are CNT coils coated with a uniform organic shell 10−15 nm thick. The sorption capacity of the original nanotubes in 1.0 M HCl and of their modified forms (in 0.1−3.0 M HCl) at room temperature and at 80°C was determined. It was found out that in strongly acidic media, SPE based on G-183 CNT and 2-mercaptobenzothiazole, effectively sorbs Pt, Pd and Au at room temperature, and Ru and Rh at the temperature of 80°C. A possibility of the selective extraction of platinum group metals and gold with this sorbent in the presence of macroquantities of Al, Fe, Cu, Ca and Mg was assessed.

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基于碳纳米管的固相萃取剂用于从盐酸介质中预浓缩贵金属

摘要开发了基于用有机试剂2-巯基苯并噻唑修饰的不同结构的多壁碳纳米管的高效固相萃取剂（SPE）。利用扫描和透射电子显微镜测定了固相萃取剂样品的形态和结构特征及其元素组成。结果表明，改性 CNT 的比表面积约为原始 CNT 的两倍。结果表明，改性材料是在 CNT 线圈上包覆了 10-15 纳米厚的均匀有机外壳。测定了原始纳米管在 1.0 M HCl 中的吸附能力，以及它们的改性形式（在 0.1-3.0 M HCl 中）在室温和 80°C 下的吸附能力。结果发现，在强酸性介质中，基于 G-183 CNT 和 2-巯基苯并噻唑的 SPE 在室温下可有效吸附铂、钯和金，在 80°C 温度下可有效吸附钌和铑。研究还评估了这种吸附剂在含有大量铝、铁、铜、钙和镁的情况下选择性萃取铂族金属和金的可能性。

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来源期刊

Journal of Analytical Chemistry 化学-分析化学

CiteScore

2.10

自引率

9.10%

发文量

146

审稿时长

13 months

期刊介绍： The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.